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Japanese dead nettle
Japanese dead nettle
Japanese dead nettle
Meehania urticifolia
The stem is upright, the height is 15 to 30 cm, long hairs are sparse, and the whole grass is fragrant. After the flower, a long running branch that crawls on the ground is taken out from under the stem. Leaves are opposite and have a petiole of 2 to 3 cm in length, a triangular heart shape, a length of 2 to 5 cm, a width of 2 to 3.5 cm, a leaf edge is a blunt sawtooth, and the base is a heart Become a shape. The wings are approximately 1.3 cm long, with 15 veins, the tip is shallow and split into five, and sparsely open hairs. The flowers are bright purple in the shape of lips. The corolla is 4 to 5 cm in length, the upper lip is split into two short, the lower lip is split into three, the central fissure is large, it curls downward and split into two shallowly, and there is a dark purple pattern on the white background, the throat There are long hairs that open at the tip of. The foliage at the base of the flower is almost the same as the leaf at the bottom, and becomes smaller when going up. The sepals are deep reddish purple than the flowers and stand out after the flowers.
Hardiness Zones
Hardiness Zones
4 to 8
plant_info

Key Facts About Japanese dead nettle

Attributes of Japanese dead nettle

Lifespan
Perennial
Plant Type
Herb
Planting Time
Spring
Plant Height
20 cm to 40 cm
Spread
1 m
Flower Color
Purple
Blue
Pink
Leaf type
Semi-evergreen
Ideal Temperature
5 - 32 ℃

Scientific Classification of Japanese dead nettle

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distribution

Distribution of Japanese dead nettle

Habitat of Japanese dead nettle

Rich damp deciduous woods

Distribution Map of Japanese dead nettle

distribution map
Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
habit
question

Questions About Japanese dead nettle

Watering Watering Watering
Sunlight Sunlight Sunlight
What is the best way to water my Japanese dead nettle?
When watering the Japanese dead nettle, you should aim to use filtered water that is at room temperature. Filtered water is better for this plant, as tap water can contain particles that are harmful to its health. The reason that the water should be at room temperature or slightly warmer is that the Japanese dead nettle comes from a warm environment, and cold water can be somewhat of a shock to its system. Also, you should avoid overhead watering for this plant, as it can cause foliage complications. Instead, simply apply your filtered room temperature water to the soil until the soil is entirely soaked. Soaking the soil can be very beneficial for this plant as it moistens the roots and helps them continue to spread through the soil and collect the nutrients they need.
Read More more
What should I do if I water my Japanese dead nettle too much or too little?
Both overwatering and underwatering will be detrimental to the health of your Japanese dead nettle, but overwatering is a far more common issue. When this species receives too much water, its stems and leaves may begin to wilt and turn from green to yellow. Overwatering over a prolonged period may also lead to diseases such as root rot, mold, and mildew, all of which can kill your plant. Underwatering is far less common for the Japanese dead nettle, as this plant has decent drought tolerance. However, underwatering remains a possibility, and when it occurs, you can expect to find that the leaves of your Japanese dead nettle have become brittle and brown.
It is crucial that you notice the signs of overwatering as soon as possible when caring for your Japanese dead nettle. Some of the diseases that arise from overwatering, such as root rot, may not be correctable if you wait too long. If you see early signs of overwatering, you should reduce your watering schedule immediately. You may also want to assess the quality of soil in which your Japanese dead nettle grows. If you find that the soil drains very poorly, you should replace it immediately with a loose, well-draining potting mix. On the other hand, if you find signs that your Japanese dead nettle is receiving too little water, all you need to do is water more regularly until those signs have subsided.
Read More more
How often should I water my Japanese dead nettle?
If your plant is in a pot. The most precise way to decide whether your Japanese dead nettle needs water is to plunge your finger into the soil. If you notice that the first two to three inches of soil have become dry, it is time to add some water.
If you grow your Japanese dead nettle outdoors in the ground, you can use a similar method to test the soil. Again, when you find that the first few inches of soil have dried out, it is time to add water. During the spring and early fall, this method will often lead you to water this plant about once every week. When extremely hot weather arrives, you may need to increase your watering frequency to about twice or more per week. With that said, mature, well-established the Japanese dead nettle can show an admirable ability to withstand drought.
Read More more
How much water does my Japanese dead nettle need?
When it comes time to water your Japanese dead nettle, you should not be shy about how much water you give. With the first two to three inches of soil dry, this plant will appreciate a long and thorough watering. Supply enough water to soak the soil entirely. The amount of water you add should be enough to cause excess water to flow through the drainage holes at the bottom of your pot. If you don’t see excess water draining from the pot, you have likely underwatered your plant. But do not let the water accumulate inside the soil, which will be very dangerous to the plant as well. Alternatively, a lack of water draining through the pot could indicate poorly draining soils, which is detrimental to the health of this plant and should be avoided. If the plant is outside, 1 inch of rain per week will be sufficient.
Read More more
How should I water my Japanese dead nettle at different growth stages?
The water needs of the Japanese dead nettle can change depending on growth stages as well. For example, when your Japanese dead nettle is in the first few years of its life, or if you have just transplanted it to a new growing location, you will need to give more water than usual. During both of those stages, your Japanese dead nettle will put a lot of energy towards sprouting new roots that will then support future growth. For those roots to perform their best, they need a bit more moisture than they would at a more mature phase. After a few seasons, your Japanese dead nettle will need much less water. Another growth stage in which this plant may need more water is during the bloom period. Flower development can make use of a significant amount of moisture, which is why you might need to give your Japanese dead nettle more water at this time.
Read More more
How should I water my Japanese dead nettle through the seasons?
The Japanese dead nettle will have its highest water needs during the hottest months of the year. During the height of summer, you may need to give this plant water more than once per week, depending on how fast the soil dries out. The opposite is true during the winter. In winter, your plant will enter a dormant phase, in which it will need far less water than usual. In fact, you may not need to water this plant at all during the winter months. However, if you do water during winter, you should not do so more than about once per month. Watering too much at this time will make it more likely that your Japanese dead nettle will contract a disease.
Read More more
What's the difference between watering my Japanese dead nettle indoors and outdoors?
It is most common to grow the Japanese dead nettle indoors for any gardener that does not live in temperate and tropical regions. Those gardeners should consider the fact that soil in a container can dry out a bit faster than ground soil. Also, the presence of drying elements such as air conditioning units can cause your Japanese dead nettle to need water on a more frequent basis as well. if you planted it outside. When that is the case, it’s likely you won’t need to water your Japanese dead nettle very much at all. If you receive rainfall on a regular basis, that may be enough to keep your plant alive. Alternatively, those who grow this plant inside will need to water it more often, as allowing rainwater to soak the soil will not be an option.
Read More more
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More Info on Japanese Dead Nettle Growth and Care

Basic Care Guide
Lighting
Partial sun
Japanese dead nettle is a plant that thrives well under moderate sunlight although capable of growing even in areas where sunlight is significantly filtered. The light exposure influences its overall health and growth. In its native environment, it grows in areas that are not exposed to extreme sunlight. Prolonged exposure to pronounced light or marked shade can impede its growth and vigor.
Best Sunlight Practices
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Japanese dead nettle
Japanese dead nettle
Japanese dead nettle
Meehania urticifolia
The stem is upright, the height is 15 to 30 cm, long hairs are sparse, and the whole grass is fragrant. After the flower, a long running branch that crawls on the ground is taken out from under the stem. Leaves are opposite and have a petiole of 2 to 3 cm in length, a triangular heart shape, a length of 2 to 5 cm, a width of 2 to 3.5 cm, a leaf edge is a blunt sawtooth, and the base is a heart Become a shape. The wings are approximately 1.3 cm long, with 15 veins, the tip is shallow and split into five, and sparsely open hairs. The flowers are bright purple in the shape of lips. The corolla is 4 to 5 cm in length, the upper lip is split into two short, the lower lip is split into three, the central fissure is large, it curls downward and split into two shallowly, and there is a dark purple pattern on the white background, the throat There are long hairs that open at the tip of. The foliage at the base of the flower is almost the same as the leaf at the bottom, and becomes smaller when going up. The sepals are deep reddish purple than the flowers and stand out after the flowers.
Hardiness Zones
Hardiness Zones
4 to 8
plant_info

Key Facts About Japanese dead nettle

Attributes of Japanese dead nettle

Lifespan
Perennial
Plant Type
Herb
Planting Time
Spring
Plant Height
20 cm to 40 cm
Spread
1 m
Flower Color
Purple
Blue
Pink
Leaf type
Semi-evergreen
Ideal Temperature
5 - 32 ℃
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Scientific Classification of Japanese dead nettle

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distribution

Distribution of Japanese dead nettle

Habitat of Japanese dead nettle

Rich damp deciduous woods

Distribution Map of Japanese dead nettle

distribution map
Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
question

Questions About Japanese dead nettle

Watering Watering Watering
Sunlight Sunlight Sunlight
What is the best way to water my Japanese dead nettle?
more
What should I do if I water my Japanese dead nettle too much or too little?
more
How often should I water my Japanese dead nettle?
more
How much water does my Japanese dead nettle need?
more
How should I water my Japanese dead nettle at different growth stages?
more
How should I water my Japanese dead nettle through the seasons?
more
What's the difference between watering my Japanese dead nettle indoors and outdoors?
more
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Get tips and tricks for your plants.
Keep your plants happy and healthy with our guide to watering, lighting, feeding and more.
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care_scenes

More Info on Japanese Dead Nettle Growth and Care

Basic Care Guide
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Your Ultimate Guide to Plants
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80+ scholars in botany and gardening
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Lighting
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Outdoor
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Requirements
Partial sun
Ideal
About 3-6 hours sunlight
Full shade
Tolerance
Less than 3 hours of sunlight
Watch how sunlight gracefully moves through your garden, and choose spots that provide the perfect balance of light and shade for your plants, ensuring their happiness.
Essentials
Japanese dead nettle is a plant that thrives well under moderate sunlight although capable of growing even in areas where sunlight is significantly filtered. The light exposure influences its overall health and growth. In its native environment, it grows in areas that are not exposed to extreme sunlight. Prolonged exposure to pronounced light or marked shade can impede its growth and vigor.
Preferred
Tolerable
Unsuitable
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Artificial lighting
Indoor plants require adequate lighting for optimal growth. When natural sunlight is insufficient, particularly in winter or in less sunny spaces, artificial lights offer a vital solution, promoting faster, healthier growth.
View more
Indoor plants require adequate lighting for optimal growth. When natural sunlight is insufficient, particularly in winter or in less sunny spaces, artificial lights offer a vital solution, promoting faster, healthier growth.
1. Choose the right type of artificial light: LED lights are a popular choice for indoor plant lighting because they can be customized to provide the specific wavelengths of light that your plants need.
Full sun plants need 30-50W/sq ft of artificial light, partial sun plants need 20-30W/sq ft, and full shade plants need 10-20W/sq ft.
2. Determine the appropriate distance: Place the light source 12-36 inches above the plant to mimic natural sunlight.
3. Determine the duration: Mimic the length of natural daylight hours for your plant species. most plants need 8-12 hours of light per day.
Important Symptoms
Symptoms of Insufficient Light in %s
Japanese dead nettle is a versatile plant that thrives in full sunlight but can tolerate partial shade. While it can adapt to different light conditions, when grown indoors with insufficient light, subtle symptoms of light deficiency may arise.
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(Symptom details and solutions)
Small leaves
New leaves may grow smaller in size compared to the previous ones once they have matured.
Leggy or sparse growth
The spaces between leaves or stems of your Japanese dead nettle may become longer, resulting in a thin and stretched-out appearance. This can make the plant look sparse and weak, and it may easily break or lean due to its own weight.
Faster leaf drop
When plants are exposed to low light conditions, they tend to shed older leaves early to conserve resources. Within a limited time, these resources can be utilized to grow new leaves until the plant's energy reserves are depleted.
Slower or no new growth
Japanese dead nettle enters a survival mode when light conditions are poor, which leads to a halt in leaf production. As a result, the plant's growth becomes delayed or stops altogether.
Lighter-colored new leaves
Insufficient sunlight can cause leaves to develop irregular color patterns or appear pale. This indicates a lack of chlorophyll and essential nutrients.
Solutions
1. To optimize plant growth, shift them to increasingly sunnier spots each week until they receive 3-6 hours of direct sunlight daily, enabling gradual adaptation to changing light conditions.2. To provide additional light for your plant, consider using artificial light if it's large or not easily movable. Keep a desk or ceiling lamp on for at least 8 hours daily, or invest in professional plant grow lights for ample light.
Symptoms of Excessive light in %s
Japanese dead nettle thrives in full sun exposure but can adapt to partial shade. Although sunburn symptoms occur occasionally, they are generally tolerant of different light conditions due to their resilience.
View more
(Symptom details and solutions)
Chlorosis
Chlorosis is a condition where the plant's leaves lose their green color and turn yellow. This is due to the breakdown of chlorophyll from excessive sunlight, which negatively affects the plant's ability to photosynthesize.
Sunscald
Sunscald occurs when the plant's leaves or stems are damaged by intense sunlight exposure. It appears as pale, bleached, or necrotic areas on the plant tissue and can reduce the plant's overall health.
Leaf Curling
Leaf curling is a symptom where leaves curl or twist under extreme sunlight conditions. This is a defense mechanism used by the plant to reduce its surface area exposed to sunlight, minimizing water loss and damage.
Wilting
Wilting occurs when a plant loses turgor pressure and its leaves and stems begin to droop. Overexposure to sunlight can cause wilting by increasing the plant's water loss through transpiration, making it difficult for the plant to maintain adequate hydration.
Leaf Scorching
Leaf scorching is a symptom characterized by the appearance of brown, dry, and crispy edges or patches on leaves due to excessive sunlight. This can lead to a reduction in photosynthetic capacity and overall plant health.
Solutions
1. Move your plant to the optimal position where it can receive abundant sunlight but also have some shade. An east-facing window is an ideal choice as the morning sunlight is gentler. This way, your plant can enjoy ample sunlight while reducing the risk of sunburn.2. It is recommended to trim off any completely dehydrated or withered parts of the plant.
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