How to care Sweet Basil

Sweet basil is a species of mint plant native to Asia and Africa. It is a popular houseplant, and thrives when it receives plenty of regular sun and water. This plant is also easy to transfer from one soil environment to another. The edible sweet basil leaves can be eaten fresh or dried with pizza, salads, soups, teas, and many other dishes.

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Water

Twice per week

Sunlight

Full sun

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Basic Care Guide

Water

Sweet basil likes a moist environment. Frequent watering is required for seedlings to keep the soil moist. Established plants should be watered once every 4-6 days in spring and fall, and every 2-4 days in summer. In winter, move inside and reduce watering.

Also, it is preferable to use rainwater and distilled water, because tap water may contain a lot of calcium, magnesium, and other mineral salts, and long-term use tends to compact the soil. Inserting a finger into the flowerpot soil. If the soil is particularly hard and dry, it needs to be watered immediately. If the soil is soft and wet, no immediate watering is required.

Ground Sweet basil

Sweet basil needs water regularly throughout the growing season.There are a few different ways you can go about determining how much water to give to your Sweet basil . Some gardeners choose to pick their water volume based on feeling the soil for moisture. That method suggests that you should water until you feel that the first six inches of soil have become moist. Beginning in spring, you should plan to water this plant about once per week.Typically, you should give a Sweet basil about two gallons of water per week, depending on how hot it is and how quickly the soil becomes dry. However, following strict guidelines like that can lead to overwatering if your plant requires less than two gallons per week for whatever reason. As the season presses on and grows warmer, you may need to increase your watering rate to about two to three times per week. Exceeding at this rate can be detrimental to your Sweet basil . With that said, you should also ensure that the soil in which your Sweet basil grows remains relatively moist but not wet, regardless of how often you must water to make that the case.

Potted Sweet basil

Watering a Sweet basil that lives in a pot is a bit different. Generally, you'll need to increase your watering frequency, as the soil in a pot can heat up and dry out a bit faster than ground soil. As such, you should plan to water a container-grown Sweet basil a few times per week in most cases, versus just once per week for an in-ground plant. You will need to use a different method to determine how much water to supply. Typically, you should give enough water to moisten all of the layers of soil that have become dry. To test if that is the case, you can simply stick your finger in the soil to feel for moisture. You can also water the soil until you notice a slight trickle of excess water exiting the drainage holes of your pot.

Sweet basil will move through several different growth stages throughout the year, some of which may require more water than others. For example, you will probably start your Sweet basil as a seed. While the seed germinates, you should plant to give more water than your Sweet basil will need later in life, watering often enough to maintain consistent soil moisture. After a few weeks, your Sweet basil will grow above the soil and may need slightly less water than at the seedling phase. Then, once this plant is mature, you can begin to use the regular watering frequency of about once per week. As flower development takes place, you may need to give slightly more water to aid the process.

Underwater and overwater

The remedy for underwatering a Sweet basil plant is somewhat obvious. When you notice that your plant lacks moisture, simply begin watering it on a more regular basis. The issue of overwatering can be a much more dire situation, especially if you fail to notice it early. When a Sweet basil is overwatered, it may contract diseases that lead to its decline and death. The best way to prevent this outcome is to choose a proper growing location, one that receives plenty of sunlight to help dry the soil and has good enough drainage to allow excess water to drain rather than pooling and causing waterlogged soils. If you overwater a Sweet basil that lives in a pot, you may need to consider changing it to a new pot. Your previous container may not have contained soil with good drainage or may not have had sufficient drainage holes. As you repot your overwatered Sweet basil , make sure to add loose soils and to use a pot that drains efficiently.

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What is the best way to water my Sweet basil?

To water Sweet basil, you can use a garden hose with a spray nozzle, a watering can, or just about any other common watering tool. Generally, Sweet basil is not too picky about how they receive their water, as they can live off of rainwater, tap water, or filtered water. Often, you should try not to water this plant from overhead, as doing so can damage the leaves and flowers and may lead to disease as well. At times, the best method for watering this plant is to set up a drip irrigation system. These systems work well for Sweet basil as they apply water evenly and directly to the soil. For one Sweet basil that grows in a container, you can use a similar watering approach while changing the tools you use. To water a container-grown Sweet basil, use a cup, watering can, or your tap to apply water directly to the soil.

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What should I do if I water my Sweet basil too much or too little?

The remedy for underwatering Sweet basil is somewhat obvious. When you notice that your plant lacks moisture, simply begin watering it on a more regular basis. The issue of overwatering can be a much more dire situation, especially if you fail to notice it early. When your Sweet basil is overwatered, it may contract diseases that lead to its decline and death. The best way to prevent this outcome is to choose a proper growing location, one that receives plenty of sunlight to help dry the soil and has good enough drainage to allow excess water to drain rather than pooling and causing waterlogged soils. If you overwater your Sweet basil that lives in a pot, you may need to consider changing it to a new pot. Your previous container may not have contained soil with good drainage or may not have had sufficient drainage holes. As you repot your overwatered Sweet basil, make sure to add loose soils and to use a pot that drains efficiently.

How often should I water my Sweet basil?

Sweet basil needs water regularly throughout the growing season. Beginning in spring, you should plan to water this plant about once per week. As the season presses on and grows warmer, you may need to increase your watering rate to about two to three times per week. Exceeding at this rate can be detrimental to your Sweet basil. With that said, you should also ensure that the soil in which your Sweet basil grows remains relatively moist but not wet, regardless of how often you must water to make that the case. Watering Sweet basil that lives in a pot is a bit different. Generally, you'll need to increase your watering frequency, as the soil in a pot can heat up and dry out a bit faster than ground soil. As such, you should plan to water a container-grown Sweet basil a few times per week in most cases, versus just once per week for an in-ground plant.

How much water does my Sweet basil need?

There are a few different ways you can go about determining how much water to give to your Sweet basil. Some gardeners choose to pick their water volume based on feeling the soil for moisture. That method suggests that you should water until you feel that the first six inches of soil have become moist. Alternatively, you can use a set measurement to determine how much to water your Sweet basil. Typically, you should give your Sweet basil about two gallons of water per week, depending on how hot it is and how quickly the soil becomes dry. However, following strict guidelines like that can lead to overwatering if your plant requires less than two gallons per week for whatever reason. When growing Sweet basil in a container, you will need to use a different method to determine how much water to supply. Typically, you should give enough water to moisten all of the layers of soil that have become dry. To test if that is the case, you can simply stick your finger in the soil to feel for moisture. You can also water the soil until you notice a slight trickle of excess water exiting the drainage holes of your pot.

How can I tell if i'm watering my Sweet basil enough?

It can be somewhat difficult to avoid overwatering your Sweet basil. On the one hand, these plants have relatively deep roots that require you to moisten the soil weekly. On the other hand, Sweet basil are plants that are incredibly susceptible to root rot. Along with root rot, your Sweet basil may also experience browning as a result of overwatering. Underwatering is far less likely for your Sweet basil as these plants can survive for a while in the absence of supplemental watering. However, if you go too long without giving this plant water, it will likely begin to wilt. You may also notice dry leaves.

How should I water my Sweet basil through the seasons?

You can expect your Sweet basil’s water needs to increase as the season moves on. During spring, you should water about once per week. Then, as the summer heat arrives, you will likely need to give a bit more water to your Sweet basil, at times increasing to about three times per week. This is especially true of Sweet basil that grow in containers, as the soil in a container is far more likely to dry out faster than ground soil when the weather is warm. In autumn, while your Sweet basil is still in bloom, it may need a bit less water as the temperature has likely declined, and the sun is no longer as strong as it was in summer.

How should I water my Sweet basil at different growth stages?

Sweet basil will move through several different growth stages throughout the year, some of which may require more water than others. For example, you will probably start your Sweet basil as a seed. While the seed germinates, you should plant to give more water than your Sweet basil will need later in life, watering often enough to maintain consistent soil moisture. After a few weeks, your Sweet basil will grow above the soil and may need slightly less water than at the seedling phase. Then, once this plant is mature, you can begin to use the regular watering frequency of about once per week. As flower development takes place, you may need to give slightly more water to aid the process.

What's the difference between watering Sweet basil indoors and outdoors?

There are several reasons why most Sweet basil grow outdoors rather than indoors. The first is that these plants typically grow to tall. The second reason is that Sweet basil needs more daily sunlight than most indoor growing locations can provide. If you are able to provide a suitable indoor growing location, you may find that you need to give your Sweet basil water a bit more often than you would in an outdoor growing location. Part of the reason for this is that indoor growing locations tend to be a lot drier than outdoor ones due to HVAC units. The other reason for this is that soil in containers can dry out relatively quickly as well compared to soil in the ground.

Fertilizer

An appropriate amount of quick-acting fertilizer can make sweet basil grow better based on the principle of less fertilizer applied more frequently. In the case of fertilizer deficiency, sweet basil will be short. In the prosperous growing period, organic fertilizer can be applied once every two weeks. Observe its growth and keep it growing healthily.

During spring and fall, the roots, stem, and leaves grow and the flower buds differentiate. In summer, the temperature is high and the water evaporation is fast. Liquid fertilizer should be applied in small amounts but frequently. In winter, the temperature is low and the plant grows slowly or even stops growing, so no fertilizer is required generally.

Sweet basil is grown for its attractive foliage. It does best when it is grown in a rich potting mix with a neutral pH level. If the soil is rich enough, it may not be necessary to provide any extra nutrients in the form of fertilizer. However, this plant can benefit from frequent, weak doses of fertilizer to keep leaves growing well. And, if you want your Sweet basil to produce move leaves, you will need to provide both sufficient fertilizer and a lot of moisture.

All plants need nutrients to grow, but some types are able to take what they need and don’t need any supplementation with fertilizers. Sweet basil, like other plants, use nutrients to support growth and all internal processes. Each of the main nutrients that plants use (nitrogen, phosphorus, and potassium) contribute to one or more of a plant’s essential functions, and in the case of foliage it is nitrogen that provides the most support. It can be difficult for a Sweet basil to get enough nitrogen from the soil , which is why many gardeners prefer to supplement by feeding Sweet basil with a source of nitrogen.

Sweet basil generally grows well, but a fertilizer can be applied about once a month to give the plant a boost when it is actively growing. You should fertilize Sweet basil about once a month only during the spring and summer months, but not during fall and winter when it becomes less active and does not use as many nutrients.You’ll know when to start fertilizing Sweet basil if you see signs of new growth. The fertilization schedule remains the same whether the plant is grown outside or indoors in a container. However, if your Sweet basil is in a container, you probably will not need to fertilize for the first one to two months. Potting soil made for container plants already contains plenty of nutrients, so you should only start to fertilize after your plant has been in the same soil for a while.

A balanced fertilizer works well for Sweet basil, for example an all-purpose fertilizer with a 10-10-10 NPK number. For natural fertilizers, blood meal or worm castings work well. You may also choose a fertilizer that is higher in nitrogen than other nutrients, such as fish fertilizer. Nitrogen provides support to leaves, which are the main feature that people want from Sweet basil. There is no point in providing a lot of supplements for flowers or seeds if that is not your purpose in growing the plant. Apply fertilizer based on the instructions on the particular type you have purchased. It is generally a good idea to start with half-strength fertilizer to avoid accidentally over-fertilizing your Sweet basil. Since this plant requires frequent fertilization, it is common to accidentally fertilize too much. Remember that it’s always easier to add more fertilizer than it is to try to save an over-fertilized plant. Don’t apply fertilizer to dry soil - it should already be at least somewhat moist before fertilizing. This helps the fertilizer absorb more easily and helps avoid fertilizer burn. You should also water after applying dry fertilizers to your soil.

Some fertilizers are meant to be mixed into the soil when planting, while others are applied on top of the soil and then watered in. For most types of Sweet basil, a water soluble fertilizer is an easy choice. Simply mix the fertilizer solution into your watering can at the recommended dosage for Sweet basil and then water the plant as usual. Slow-release granules or fertilizer spikes can also work well if you prefer not to remember to fertilize monthly.

Over-fertilization leads to a build-up of salts in the soil which leads to a lack of vitality overall and pale coloration in the leaves. Leaves may also wilt or develop brown tips as the excess salt from the fertilizer tries to make its way out of the leaves. Too much fertilizer makes it impossible for the plant to take up water and nutrients, which will eventually kill it if you don’t take steps to save your Sweet basil. If the Sweet basil is in a container, you could either remove it from the pot and repot it in fresh potting mix, or flush out the soil by running a lot of water through and letting it drain out thoroughly. If your Sweet basil is outdoors, the same theory applies, although it can be more difficult to flush outdoor soil. Water thoroughly and hold off on fertilizing again for a while. You may want to perform a soil test before you add any more fertilizer to make sure you don’t provide too much of any one nutrient.

Never fertilize your Sweet basil if it is not healthy, for example if it has developed a disease or has insect pests on it. Also do not fertilize a dehydrated plant, since the fertilizer will make this problem even worse. Only fertilize healthy plants. Do not splash fertilizer onto the leaves or stem of this plant when watering, since it can cause burned spots. Be careful not to allow the fertilizer to make direct contact with the plant, unless you are usually a special fertilizer designed to be applied to the foliage.

Why do I need to fertilize my Sweet basil?

All plants need nutrients to grow, but some types are able to take what they need and don’t need any supplementation with fertilizers. Sweet basil, like other plants, use nutrients to support growth and all internal processes.

Each of the main nutrients that plants use (nitrogen, phosphorus, and potassium) contribute to one or more of a plant’s essential functions, and in the case of foliage it is nitrogen that provides the most support. It can be difficult for a Sweet basil to get enough nitrogen from the soil, which is why many gardeners prefer to supplement by feeding Sweet basil with a source of nitrogen.

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When is the best time to fertilize my Sweet basil?

Sweet basil generally grows well, but a fertilizer can be applied about once a month to give the plant a boost when it is actively growing. You should fertilize Sweet basil about once a month only during the spring and summer months, but not during fall and winter when it becomes less active and does not use as many nutrients.

You’ll know when to start fertilizing Sweet basil if you see signs of new growth. The fertilization schedule remains the same whether the plant is grown outside or indoors in a container. However, if your Sweet basil is in a container, you probably will not need to fertilize for the first one to two months. Potting soil made for container plants already contains plenty of nutrients, so you should only start to fertilize after your plant has been in the same soil for a while.

When should I avoid fertilizing my Sweet basil?

Never fertilize your Sweet basil if it is not healthy, for example if it has developed a disease or has insect pests on it. Also do not fertilize a dehydrated plant, since the fertilizer will make this problem even worse. Only fertilize healthy plants.

Do not splash fertilizer onto the leaves or stem of this plant when watering, since it can cause burned spots. Be careful not to allow the fertilizer to make direct contact with the plant, unless you are usually a special fertilizer designed to be applied to the foliage.

What type of fertilizer does my Sweet basil need?

Fertilizers contain high levels of nitrogen, potassium and phosphorus, along with other essential nutrients such as iron, manganese and zinc. These are all necessary elements that promote growth in Sweet basil.

A balanced fertilizer works well for Sweet basil, for example an all-purpose fertilizer with a 10-10-10 NPK number. For natural fertilizers, blood meal or worm castings work well. You may also choose a fertilizer that is higher in nitrogen than other nutrients, such as fish fertilizer. Nitrogen provides support to leaves, which are the main feature that people want from Sweet basil. There is no point in providing a lot of supplements for flowers or seeds if that is not your purpose in growing the plant.

How do I fertilize my Sweet basil?

Apply fertilizer based on the instructions on the particular type you have purchased. It is generally a good idea to start with half-strength fertilizer to avoid accidentally over-fertilizing your Sweet basil. Since this plant requires frequent fertilization, it is common to accidentally fertilize too much. Remember that it’s always easier to add more fertilizer than it is to try to save an over-fertilized plant.

Don’t apply fertilizer to dry soil - it should already be at least somewhat moist before fertilizing. This helps the fertilizer absorb more easily and helps avoid fertilizer burn. You should also water after applying dry fertilizers to your soil.

Some fertilizers are meant to be mixed into the soil when planting, while others are applied on top of the soil and then watered in. For most types of Sweet basil, a water soluble fertilizer is an easy choice. Simply mix the fertilizer solution into your watering can at the recommended dosage for Sweet basil and then water the plant as usual. Slow-release granules or fertilizer spikes can also work well if you prefer not to remember to fertilize monthly.

What happens if I fertilize my Sweet basil too much?

Over-fertilization leads to a build-up of salts in the soil which leads to a lack of vitality overall and pale coloration in the leaves. Leaves may also wilt or develop brown tips as the excess salt from the fertilizer tries to make its way out of the leaves.

Too much fertilizer makes it impossible for the plant to take up water and nutrients, which will eventually kill it if you don’t take steps to save your Sweet basil. If the Sweet basil is in a container, you could either remove it from the pot and repot it in fresh potting mix, or flush out the soil by running a lot of water through and letting it drain out thoroughly.

If your Sweet basil is outdoors, the same theory applies, although it can be more difficult to flush outdoor soil. Water thoroughly and hold off on fertilizing again for a while. You may want to perform a soil test before you add any more fertilizer to make sure you don’t provide too much of any one nutrient.

Sunlight

Sweet basil is a full sun plant and needs sufficient sunlight during the whole growth period. It is best placed where it is exposed to sunlight for more than 6 hours average daily. Without enough sunlight, photosynthesis will be inhibited and accumulated nutrients reduced.

If the average daily sunlight exposure is less than 4 hours, thin leaves and light aroma may result. However, sweet basil should be properly shaded in hot summers, especially the seedlings.

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How much sunlight should Sweet basil get per day to grow healthily?

You must expose the plants to at least 6 to 8 hours of sunlight daily. They prefer more exposure to the morning light, especially in the summer. The Sweet basil needs full sun and more sunlight that it can get. The more light these species get, the more they can manufacture food, produce beautiful blooms, and survive.

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What type of sunlight does Sweet basil need?

The Sweet basil grows best under full sunlight. It's best not to crowd them together so they can get exposure to the sun evenly. The leaves shouldn't be starved with sunlight. If planted in pots, try to expose the herbaceous flowers in windows with direct sun and ensure they receive full sunlight regardless of the months.

They don't tend to do well in partial or filtered light as this will not produce strong stems and healthy flowers. It's best if the Sweet basil is always exposed to the sun.

Can sunlight hurt plants? How to protect Sweet basil from sun and heat damage?

When the temperature rises above 90℉(32℃), the Sweet basil can get damaged by extreme temperatures, especially if they are exposed to many hours of sun. It's always ideal for providing some shade from the light in the afternoon in the summer. It's always important to keep in mind that the sunlight in the summer is stronger than the one in the winter. Sunlight exposure is also 50% longer in the summer than in the winter.

If the Sweet basil is too stressed with sunlight, you might want to keep them fully hydrated. Water them when the top of the soil is about 2 inches dry, and move the plants indoors if it's too hot outside. This is the case if they are planted in containers.

It can be normal for the plant leaves to wilt during the day. Generally, they can recover at night. However, when you notice that the Sweet basil is still drooping, this means that the plant is losing water fast, and you need to water them.

Should I protect Sweet basil from sun exposure?

The Sweet basil does not need any protection from the sun. In fact, they love the sun, and some species are heliotropic. Plant them in south-facing gardens whenever possible so they can be exposed from morning to afternoon. While the sun can benefit them, some may experience a sunburn. You might offer protection from the afternoon and midday sun through a shade of a tree or a wall.

Growing the Sweet basil in shady areas is impossible because the larger flowers would require a lot of energy to grow and produce. Always provide the lighting conditions and set them in an area with full sun for best results.

What will happen if Sweet basil gets inadequate sunlight?

When the Sweet basil does not get adequate sunlight, or they are not placed in full sun locations, it's worth noting that the photosynthetic process will slow down. A lack of sunlight will cause the stems to become more leggy since they become thin and long since they tend to seek too much sunlight. They will not bloom and produce seeds in the shade.

Inadequate sunlight will also mean that the older leaves can die, the color of the new ones is lighter than the old foliage, and the new growth is smaller than the last ones.

The Sweet basil indeed loves the sun so much. However, they can wilt when exposed to excessive heat and ultraviolet light during the extreme summer months, so be careful. You might want to cover them with a net that has a green shade, especially in the summer, to prevent the leaves and the flowers from scorching. When they are indoors, reduce the heat with the help of a fan.

Does Sweet basil need special care about sunlight during its different growth stages?

When the Sweet basil is growing, they need more light than their mature counterparts. The younger ones should receive adequate light, but they might not be prepared for sudden full sunlight, especially if they are grown in a nursery. They can be more sensitive to the summer sun, so the lighting should be gradual and slow.

How much light does Sweet basil need for photosynthesis?

During summer or late spring, the Sweet basil needs 6 to 8 hours of direct light every single day. This is whether they are planted outdoors. If the Sweet basil is planted in pots or you're growing them in the winter, they need direct fluorescent lights that help them grow better. Make sure to place them in an indoor area where they are facing south or east so they can have enough sunlight for photosynthesis.

Are there any cautions or tips for sunlight and Sweet basil?

When transplanting the plants, they should not be exposed to sudden sunlight. Give the Sweet basil to grow and mature before transplanting outside. Some species of herbaceous plants can grow taller and might cast a shade on other young plants. Allow between 80 to 100 days of growing season before planting another batch to ensure that every plant receives more than enough sunlight for at least 6 hours a day.

Make sure that the Sweet basil receives the best light possible, especially if it's planted in a nursery. These are sun-loving plants, but too much sunlight with a very hot temperature is also detrimental to their growth. Indoor lights should be replaced with natural sunlight as much as possible since these species crave this every day.

Pruning

Sweet basil can be pruned when they reach 20 cm in height. Yellow leaves, once found, should be cut off promptly. If the plant grows too exuberantly and the ornamental effect deteriorates, redundant branches can be cut off. After pruning, add a small amount of slow-release fertilizer. Sweet basil usually dies after the seeds are ripened, and its life can be extended by cutting off the flowers to prevent the seeds from ripening.

Is pruning necessary for my Sweet basil?

Sweet basil is a kind of annual plant so it doesn't need much pruning. You only need to cut off and clean the diseased, yellow or dropped leaves and stems during its growing period. This will help your Sweet basil to stay away from pathogens infection.

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How do I prune my Sweet basil?

During the growth of the plant, yellowing, drying and spotted leaves are produced, and these spotted and discolored leaves need to be trimmed off. If the whole piece of leave is discolored or infected, you will need to cut it off completely. In other situations, you will only need to cut off the discolored or infected part on certain leaves. Sweet basil above the ground will die and dry up in the winter, and the dead plants need to be cleaned up.

Are there any cautions I should be careful with when pruning my Sweet basil?

Sweet basil leaves are delicate, so take care not to score or bruise them. Unless the leaves are withered or heavily discolored, do not prune the leaves from the lowermost branches unless they’re damaged. They typically grow the largest, so they supply the plant with critical energy to keep it growing right. Please prevent the wounds from water after pruning until they are fully recovered. Remember always sterilize the tools before pruning. When the pruning is finished, please throw all the waste leaves and stems into the trashbins to avoid diseases and bugs.

Are there any tips for pruning my Sweet basil?

Sterilize all the tools before pruning; unclean tools will pass pathogens to the plant through wounds;
Prune on sunny days because the new cuts will be infected by pathogens if they're distained by rain or water.
Throw all the waste leaves and stems into trashbins, they will easily rot and attract diseases and bugs

When should/shouldn't I prune my Sweet basil?

Expect to prune your Sweet basil every week if it’s growing well or every two weeks if it grows slowly. It is always good to prune it on sunny days because if you prune it on rainy days, the rainwater will distain the cuts and cause the whole plant to be infected.

What should I look for when pruning my Sweet basil in different seasons?

Because Sweet basil is an annual plant, the pruning should take place basically during the seasons that the plant grows rapidly. During the growth of the plant, yellowing, drying and spotted leaves are produced, and these spotted and discolored leaves need to be trimmed off.

Advanced Care Guide

Temperature

Sweet basil is native to Tropical Asia and likes a warm and humid environment. It is more resistant to heat than cold, and to drought than waterlogging. The optimum growth temperature is between 22 to 28 ℃ in the daytime and 13 to 18 ℃ at night. The leaves will turn yellow if the ambient temperature is lower than 13 ℃. Damage may be caused to the plant if the temperature is lower than 10 ℃, and the leaves will droop if the temperature is higher than 35 ℃.

What is the optimal temperature for Sweet basil?

For this tropical plant to thrive, you’ll want to keep them between 75℉ and 90℉ (25-32℃). Each species can handle temperatures outside of this range, but keeping it within several degrees of these limits will ensure they grow to their maximum potential.

As for its extreme temperature limits, any environment below 50℉ (10℃) or above 95℉ (35℃) will begin to hinder its growth and cause various aberrations to its leaves and stems. This is especially true with low temperatures; even a light frost can cause your tropical plants to perish. Cellular death can begin to happen at a rapid pace, with some species dying in as little as 12 to 24 hours.

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Does Sweet basil require different temperatures for different growing phases?

While Sweet basil doesn’t require any changes in temperature to enter different growing phases, it is important to stay consistent. Wild temperature fluctuations can slow down its growth regardless of its current phase, so it's always better to keep them in a controlled environment. That optimal temperature range of 75℉ and 90℉ (25-32℃) is vital to maintain, especially staying above the lower limit. Going above 90℉(32℃) isn’t ideal, but as tropical plant it won’t suffer too much. On the other hand, going below 50℉ (10℃) (and especially 40℉/5℃) will begin to directly damage this heat-loving plant species.

Does Sweet basil need different temperatures for different seasons?

Sweet basil does not need different temperatures for different growing seasons. The most important step in seasonal care is to keep the environment within the optimal temperature range. That's why it's always best to keep this plant indoors. That way, you can control the temperature no matter what the climate is like outside.

Light is also important for tropical species, with all of these plants preferring a partial side level of sun exposure. This means any light they receive needs to be dappled or filtered, with bright but indirect light being the best option when growing your plants indoors. Too much direct sunlight can negatively affect your plant’s leaves, reducing its growth potential.

What are the temperature guidelines to keep your Sweet basil healthy?

Tip #1: Don’t Leave Your Plant Near Windows in Colder Months

If you want to make sure your plant isn’t exposed to colder temperatures, you may want to keep them away from windows. In colder months like late fall and winter, even the smallest draft can leak cold air into your home through cracks in your windows. While this air usually dissipates and warms up as it travels throughout your home, any plants placed in close proximity to the window will be affected. Move your tropical plants into an area where they will still get bright but indirect light, while making sure they won’t be affected by potential drafts.

Tip #2: If You Find Dry Patches, Your Plant May Be Getting Too Much Sunlight or Heat

You may notice the leaves become white or even scorched on a sunny day. These discolorations and unusual markings usually indicate that a plant is getting too much heat or sunlight, and it may be dehydrated. Excess light and heat will dry out the soil, stopping plants from getting the moisture they need to support their cellular structure. It also slows down or stops the process of photosynthesis, further hindering growth. If ignored for too long, these dry spots can spread and eventually result in the death of your plants.

Tip #3: Avoid Frost at All Costs

Colder temperatures and frost can damage your plants by causing ice crystals or disrupt normal physiological activity. This makes it nearly impossible for water to move freely throughout plant tissue, creating a deficit of moisture in their stems and leaves. You can tell a plant has been damaged by frost if it begins to suffer from hydrosis (it will appear as though it's soaked with water.) If the problem persists, your plants may begin shriveling and turning a dark brown or black hue. After that, the plant will almost certainly die.

What is the best way to maintain the right temperature for my Sweet basil?

The best way to maintain the right temperature range for Sweet basil is by keeping an eye on both the climate and humidity. You’ll want to try to keep each species in a room where you have access to climate control, keeping the heat in the temperature range best mimics its natural habitat. The humidity levels will also have a direct effect on temperature, so it's important to monitor these as well. You can artificially raise the humidity of your growing space by using a humidifier or lightly misting the leaves with water.

If you intend to grow this species outside, you may find it difficult to maintain the right balance of temperature and humidity. If temperatures begin to drop or the air becomes too dry, your best option is to find room within your home and move your plant inside. An indoor growing space will allow you to control the climate more closely, helping your plant reach its full potential.

Soil

Sweet basil is a deep-rooted plant, with the roots growing up to 51 to 102 cm deep. Therefore, well-drained, fertile, loose sandy loam or humus soil is the best culture soil. Potted plants can be planted in a mixed culture of peat and vermiculite at 2:1, or garden soil and fully decomposed organic fertilizer at 2:1.

Sweet basil does not have strict requirements on soil conditions. It can be planted in both acid and alkaline soil and can tolerate pH values of 5-8, but neutral soil is the best.

Propagation

Planting

Harvest

Sweet basil can be propagated by cuttage or sowing. Sowing is the main cultural method for families.

Only sow Sweet basil seeds in warm weather, preferably during the later weeks of spring after any danger or frost or dropping temperatures has passed. Even in warm weather, make sure the soil is warmed up sufficiently, as cooler soil can hinder germination and growth. You need to do it indoors for a successful germination if you want to sow the seeds earlier. To sow Sweet basil in your growing medium, you don't need many extra tools to get the job done. Put on your gardening gloves and get started! What you will need:

Healthy and full seeds, the germination rate of such seeds will be higher
Growing medium with potting mix soil divided into rows
Fertilizer or compost
(optional) a dibbler or stake
A spray bottle to hydrates the soil
A piece of plastic film (Optional)

Steps： Step 1: Prepare the soil: Mix the soil with organic fertilizer. Fully rotted fertilizer is recommended, and the volume of the fertilizer should not exceed one quarter of the volume of the soil when mixing. Step 2: Sprinkle the plants in the soil and cover the seed surface with soil afterwards. Or use a dibbler or stake to pre-dig holes for the seeds, placing about 3 seeds in each mound. The depth of the soil on the surface of the seed needs to be about five times the thickness of the seed. Step 3: Leave a 4-6-inch gap between each seed mound. Step 4: Water the soil in the container well after planting to provide enough water for the seeds to germinate. Step 5: Mulch the surface of the container soil to moisturize the soil and promote seed germination. Use a spray can to spray the soil with water when the soil is relatively dry. Keep this until the seeds germinate.

Note: Before seeds germinate they can be kept in a low light location. But after the seeds germinate, you need to add light to the plant in time, otherwise it will excessive growth.

Only sow Sweet basil seeds in warm weather, preferably during the later weeks of spring after any danger or frost or dropping temperatures has passed. Even in warm weather, make sure the soil is warmed up sufficiently, as cooler soil can hinder germination and growth. You need to do it indoors for a successful germination if you want to sow the seeds earlier. To sow Sweet basil in your growing medium, you don't need many extra tools to get the job done. Put on your gardening gloves and get started! What you will need:

Healthy and full seeds, the germination rate of such seeds will be higher
Growing medium with potting mix soil divided into rows
Fertilizer or compost
(optional) a dibbler or stake
A spray bottle to hydrates the soil
A piece of plastic film (Optional)

Steps： Step 1: Prepare the soil: Mix the soil with organic fertilizer. Fully rotted fertilizer is recommended, and the volume of the fertilizer should not exceed one quarter of the volume of the soil when mixing. Step 2: Sprinkle the plants in the soil and cover the seed surface with soil afterwards. Or use a dibbler or stake to pre-dig holes for the seeds, placing about 3 seeds in each mound. The depth of the soil on the surface of the seed needs to be about five times the thickness of the seed. Step 3: Leave a 4-6-inch gap between each seed mound. Step 4: Water the soil in the container well after planting to provide enough water for the seeds to germinate. Step 5: Mulch the surface of the container soil to moisturize the soil and promote seed germination. Use a spray can to spray the soil with water when the soil is relatively dry. Keep this until the seeds germinate.

Note: Before seeds germinate they can be kept in a low light location. But after the seeds germinate, you need to add light to the plant in time, otherwise it will excessive growth.

Only sow Sweet basil seeds in warm weather, preferably during the later weeks of spring after any danger or frost or dropping temperatures has passed. Even in warm weather, make sure the soil is warmed up sufficiently, as cooler soil can hinder germination and growth. You need to do it indoors for a successful germination if you want to sow the seeds earlier. To sow Sweet basil in your growing medium, you don't need many extra tools to get the job done. Put on your gardening gloves and get started! What you will need:

Healthy and full seeds, the germination rate of such seeds will be higher
Growing medium with potting mix soil divided into rows
Fertilizer or compost
(optional) a dibbler or stake
A spray bottle to hydrates the soil
A piece of plastic film (Optional)

Steps： Step 1: Prepare the soil: Mix the soil with organic fertilizer. Fully rotted fertilizer is recommended, and the volume of the fertilizer should not exceed one quarter of the volume of the soil when mixing. Step 2: Sprinkle the plants in the soil and cover the seed surface with soil afterwards. Or use a dibbler or stake to pre-dig holes for the seeds, placing about 3 seeds in each mound. The depth of the soil on the surface of the seed needs to be about five times the thickness of the seed. Step 3: Leave a 4-6-inch gap between each seed mound. Step 4: Water the soil in the container well after planting to provide enough water for the seeds to germinate. Step 5: Mulch the surface of the container soil to moisturize the soil and promote seed germination. Use a spray can to spray the soil with water when the soil is relatively dry. Keep this until the seeds germinate.

Note: Before seeds germinate they can be kept in a low light location. But after the seeds germinate, you need to add light to the plant in time, otherwise it will excessive growth.

Sweet basil is generally sown in spring and fall, and the best time for sowing is a sunny morning. The soil can be exposed to sunlight before sowing to kill harmful microorganisms in the soil. Select plump, pest-free seeds, spread them evenly in the soil, cover them with a layer of 5 mm thick soil, and spray water gently. If you worry about uneven sowing, you can mix the seeds with fine soil in advance and then spread them in the garden.

The best temperature for sowing sweet basil is about 20 ℃, and the seedlings are expected to grow in 4-5 days. When they grow 1-2 leaves, poor or excessively dense seedlings may be removed, and the spacing of seedlings set to about 3 to 4 cm. When 8-10 leaves grow out on one plant, the plant can be transplanted. Keep plants spaced to about 25 cm apart.

Sweet basil can be used as an ornamental plant or picked as a fragrant herb to cook with at any time. Its leaves can be harvested before flowers bloom. Cut leaves with a small knife and try to avoid damaging the roots. Its leaves can be used in cold dishes or salads, or to remove the fishy taste of seafood, and dried leaves can be used as a spice. Its stem, leaves, and flowers can be harvested before blooming. They can be used to extract essential oils. It is best to harvest them at 9:00-17:00 after 2-3 consecutive sunny days. Its seeds are generally be harvested in late summer.

Potting Suggestions

Needs excellent drainage in pots.

Seasonal Care Tips

Seasonal Precautions

Sweet basil is resistant to heat, so it is best to move plants indoors in winter. Sweet basil should be properly shaded in summer; seedlings especially should not be directly exposed to strong sunlight. With hot temperatures and fast water evaporation, summer is also its most intense growing period. Use a lower concentration of liquid fertilizer in summer and fertilize more often to supplement enough nutrients and water for the plant. Smooth drainage should be ensured in summer because high humidity and poor drainage can easily cause the plant to be infected with fungus leaf spot.

Summer

Fall

Winter

This plant and other annuals benefit from some care in the summer.

1

Keep the soil consistently moist, especially when rainfall is scarce. When the plant’s leaves begin losing some of the glossy shine, it’s time to water.

2

Continue to apply monthly applications of an all-purpose fertilizer.

3

Remove any spent blooms to encourage reflowering.

4

Ensure the plant is still receiving several hours of sunlight. Container plants may require relocating to another area.

5

Keep an eye out for any pests and diseases and remove debris from around the plant’s base.

As long as the plant is growing in the fall:

1

continue to care for your plant by watering and fertilizing with the all-purpose mixture. These steps will keep your annuals to keep them moist, shiny, and well-fed. If you'd rather not have your plant spread via seeds, deadhead spent blooms.

2

Some annuals may benefit from being cut back by 1/4 during the autumn.

3

To attempt to propagate more plants during the fall, you can either let your plant go to seed or sow the seeds yourself.

4

Depending on the variety, some plants do best in full sun while others need partial shade.

Your plant will only require minimal care during the colder winter months.

1

To overwinter your plant best, move it to a pot and bring it indoors, or take a cutting and propagate a new plant. As long as it isn't exposed to colder temperatures, there's a chance that your annual plant can thrive and last until spring, depending on the variety of your plant.

2

Make sure you continue providing enough light and occasional water for your overwintering annual to give it the best chance.

Common Pests & Diseases

Common issues for Sweet basil based on 10 million real cases

Brown spot

This infection can cause brown spots or patches to appear on the plant.

Solutions: In minor cases of brown spot, there isn’t any need to treat the disease. However, if much of the foliage is affected and defoliation occurs, the plant will benefit from getting rid of the infection. It is recommended to start by applying organic treatment options, working up to the more potent synthetic, chemical fungicides if necessary. Organic options won’t kill the fungus, but will prevent it from spreading. Dissolve ½ teaspoon of baking soda and one teaspoon of liquid soap in a gallon of water. Using a spray bottle, spray on tops and bottoms of leaves until the mixture drips off. Repeat every two weeks until existing spots stop enlarging and new spots no longer appear. Spray a copper-based fungicidal soap on the leaves, coating the top and bottom leaf surfaces. Reapply as directed on the product label. Copper penetrates the leaf surface and prevents germination of spores so the fungus cannot spread. Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.

Leaf rot

This pathogen can cause the leaves to rot.

Solutions: Bacterial infections need to be treated quickly to prevent the spread to neighboring, healthy plants, potentially wiping out large sections of your indoor or outdoor garden. In mild cases: Use sterilized (10% bleach solution) pruning shears or scissors to remove any infected plant parts, making sure to dispose of them off site. Use a copper-based bactericide to treat the unaffected foliage, as well as the soil, and neighboring plants. Follow the manufacturer’s rate and timing directions found on the product label. In severe cases, where more than half the leaves are affected: Remove all of the infected plants from the garden, disposing of them off site. Treat the soil and neighboring plants using a copper-based bactericide. Follow the manufacturer’s rate and timing directions found on the product label.

Underwatering

Leaves may wilt for a variety of reasons.

Solutions: The easiest (and most obvious) way to address underwatering is to fully hydrate the plant. However, this must be done carefully. A common mistake that many gardeners make is to douse their underwatered plants with water. This can overwhelm the roots of the plant and shock its system, something that can be even more damaging than the lack of water to begin with. Instead, water thoroughly and slowly, taking breaks to let the water slowly saturate through the soil to get to the roots. Use room temperature water, as cold water might be too much of a shock. In the future, shorten the time between waterings. A good rule of thumb is to check the soil around each plant daily. If it’s dry to at least two inches down, it’s time to water. If a container plant is repeatedly drying out very quickly, repotting into a slower-draining container might be a good idea, too.

Leaf deformity

Leaf deformities can have a variety of causes.

Solutions: Follow these steps to revive plants with abnormal leaves. Remove damaged leaves: Plants can recover from damage when given the time to do so. Remove any deformed leaves so they don't continue drawing energy from the plant. This also creates room for healthier ones to grow. Stop using herbicide: Though herbicide damage is challenging to diagnose, gardeners can potentially prevent deformed leaves by not using any and by strictly following manufacturers instructions. Spray insecticide: Prevent pests from inhabiting plant leaves by spraying with insecticide regularly and practicing good natural pest prevention techniques. Apply a balanced fertilizer: Solve nutrient deficiencies and excesses by using a well-balanced fertilizer (organic or conventional both work) before planting, and consider topdressing when signs of stress are apparent. Fix watering schedule: If plant leaves are curled downward due to too much or too little water, adjust the watering schedule so the soil is moist, but not damp. Remove infected plants: If the plant has succumbed to a viral infection, not much can be done to revive it. Remove and destroy all compromised plant material to prevent spread to other plants.

Aged yellow and dry

Natural aging can cause leaves to turn yellow and dry out.

Solutions: If the yellowing and drying of leaves and flowers is a natural progression due to age, nothing can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible.

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More About Sweet Basil

Plant Type

Herb

Lifespan

Annual, Perennial, Biennial

Spread

30 cm

Bloom Time

Summer, Fall

Flower Color

White

Pink

Purple

Leaf Color

Green

Purple

Flower Size

Inflorescence 3 cm to 8 cm

Plant Height

20 to 150 cm

Name story

Sweet basil

In European cuisine, it will be like losing its soul when there is no basil in the dish. No matter what recipe it is, you will like to add a little of it into the dish. It is because it gives off a strong and intense smell yet it adds a hint of sweetness into the dish. Hence, it is called Sweet basil.

Usages

Beauty Improvement Value

Sweet basil can be made into essential oil to moisturize and tighten skin, balance oil secretion, and refresh the mind with its cooling smell.

Garden Use

Anyone with an herb garden is likely to have at least one sweet basil plant growing. It is a staple of food and herb gardens because of its aromatic properties and resistance to deer and rabbits. Sweet basil can be grown by other herbs or veggies, such as tomatoes and peppers, and will naturally repel insects.

View More Info

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Common Problems

Why do the leaves turn yellow or wither?

There are many reasons for yellowing leaves. Leaves turn yellow if the temperature is lower than 13 ℃. Therefore, it is best to move plants inside in winter if the ambient temperature is too low. If the soil is dry for a long time or the soil is poorly drained, diseases may result. Keep soil moist and well-drained. If they don't get enough sunlight, plants can't produce enough energy through photosynthesis, and leaves turn yellow or wither. Your plant should be exposed to 6 or more hours of sunlight. It is also possible that insufficient soil fertility causes the leaves to turn yellow or wither, and a suitable amount of organic fertilizer can be applied to improve the plant's condition.

Why do the leaf tips wither?

Leaf tips can wither from insufficient water or sunlight. The flowerpot may be changed and the water amount should be well controlled. Lighting should be adjusted in summer and winter to avoid blazing sunlight in summer and ensure sufficient sunlight in winter.

Why do the leaves curl and shrink?

If the plant cannot obtain sufficient water, leaves shrink due to water shortage, so you must control how much water it gets. It is also possible that the root got damaged during a flowerpot change. The plant absorbs water from the soil through the root, so the root damage can cause water shortage. It will take some time for the plant to recover in such a case. It may also be affected by insects, such as aphids, which feed on the sap in the plant, causing the young leaves to curl and shrink. Insects can be washed away with water and/or special pesticides applied.

Why doesn't the plant have an aroma, or only a light aroma?

The aromas of sweet basil vary from variety to variety, just like that of the lilac flower. Some aromas are slightly peppermint, slightly sweet, or slightly spicy. Light aromas may be caused by insufficient sunlight or fertilizer. The average time of daily sunlight exposure should be above 4 hours and slow-release fertilizer should be added.

Why doesn't it ever bloom?

Insufficiency of sunlight or fertilizer can keep a plant from blooming. Put the plant in a bright, ventilated place, and apply a proper amount of nutrient solution each time you water. It may also be due to the long-term use of tap water with high mineral salts, so it is recommended to water with rainwater or distilled water instead of tap water.

Why do the roots of sweet basil rot?

Sweet basil is a deep-rooted plant; roots grow up to 51 to 102 cm long. Therefore, the size and depth of the flowerpot must be considerable. In addition, the growth of the root is closely related to the quality of soil, so poor drainage, permeability, and improper watering can cause the roots to rot. Sandy loam, or soil with good drainage and permeability, is preferred. Water more in summer and less in winter.

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American pokeweed

Although its berries look juicy and tempting, the fruits and the root of american pokeweed are toxic and should not be eaten. American pokeweed is considered a pest species by farmers but is nevertheless often grown as an ornamental plant. Its berries can be made into pokeberry ink as well.

Bloom Time

Summer

Horseweed

Horseweed is a North American herbaceous annual plant with a hairy stem, numerous pointed leaves, and waxy inflorescence. It has been naturalized in Eurasia and Australia, where it is a common weed in urban and agricultural regions. Horseweed can be used in a survival situation to start a friction fire.

Bloom Time

Summer

Plumed cockscomb

The plumed cockscomb is a bright plant with recognizable red, pink, or purple flowers. It grows best in warm, tropical environments. Occasionally, plumed cockscomb is used as an ingredient in soap. In China and India, however, the plant is considered a pesky weed that reduces biodiversity.

Bloom Time

Summer

Elder

Elder is a malodorous shrub whose berries nevertheless act as an important food source for birds. To humans, except for its flowers and ripen fruits, other parts are poisonous. Ripen fruits can be cooked and made into jams, jellies and chutneys, while flowers could be made into syrups, but it is recommended to be guided by a professional before picking.

Bloom Time

Summer

Lambsquarters

Lambsquarters has many other names, including pigweed, goosefoot, and bacon weed. This plant seems to appear out of nowhere and is considered by many to be a pesky weed. However, the greens of this plant are edible, can be prepared similar to spinach, and are packed with nutrients.

Bloom Time

Summer

Cucumber

Cucumber (Cucumis sativus) is a creeping vine native to South Asia. It has a long history of cultivation - mentions of its use are found in various ancient scripts, including the Bible, Epic of Gilgamesh and Pliny the Elder's "Natural History". Today, cucumber is one of the most widely cultivated vegetable species in the world.

Bloom Time

Summer

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How to care Sweet Basil

Symbolism

Basic Care Guide

Water

Water

Never miss a care task again!

Fertilizer

Fertilizer

Sunlight

Know the light your plants really get.

Pruning

Advanced Care Guide

Temperature

Soil

Propagation

Planting

Harvest

Propagation

Potting Suggestions

Seasonal Care Tips

Seasonal Precautions

Summer

Fall

Winter

This plant and other annuals benefit from some care in the summer.

As long as the plant is growing in the fall:

Your plant will only require minimal care during the colder winter months.

Common Pests & Diseases

Treat and prevent plant diseases.

More About Sweet Basil

Name story

Usages

Find your perfect green friends.

Common Problems

Why do the leaves turn yellow or wither?

Why do the leaf tips wither?

Why do the leaves curl and shrink?

Why doesn't the plant have an aroma, or only a light aroma?

Why doesn't it ever bloom?

Why do the roots of sweet basil rot?

Plants with Same Care Needs

Botanist in your pocket

App

How to care Sweet Basil

Symbolism

Basic Care Guide

Water

Water

Never miss a care task again!

Fertilizer

Fertilizer

Sunlight

Know the light your plants really get.

Pruning

Advanced Care Guide

Temperature

Soil

Propagation

Planting

Harvest

Propagation

Potting Suggestions

Seasonal Care Tips

Seasonal Precautions

Summer

Fall

Winter

This plant and other annuals benefit from some care in the summer.

As long as the plant is growing in the fall:

Your plant will only require minimal care during the colder winter months.

Common Pests & Diseases

Treat and prevent plant diseases.

More About Sweet Basil

Name story

Usages

Find your perfect green friends.

Common Problems

Why do the leaves turn yellow or wither?

Why do the leaf tips wither?

Why do the leaves curl and shrink?