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Jerusalem thorn
Jerusalem thorn
Jerusalem thorn
Jerusalem thorn
Jerusalem thorn
Jerusalem thorn
Jerusalem thorn
Parkinsonia aculeata
Also known as : Mexican palo verde, Palo de rayo
Planting Time
Planting Time
Summer
care guide

Care Guide for Jerusalem thorn

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Watering Care
Watering Care
Details on Watering Care Watering Care
Soil Care
Soil Care
Sand, Loam, Clay, Chalky, Acidic, Neutral
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Ideal Lighting
Ideal Lighting
Full sun, Partial sun
Details on Sunlight Requirements Ideal Lighting
Ideal Temperature
Ideal Temperature
8 to 11
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Planting Time
Planting Time
Summer
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Jerusalem thorn
Water
Water
Every 1-2 weeks
Sunlight
Sunlight
Full sun
Planting Time
Planting Time
Summer
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Questions About Jerusalem thorn

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Watering Watering Watering
Pruning Pruning Pruning
Sunlight Sunlight Sunlight
Temperature Temperature Temperature
Fertilizing Fertilizing Fertilizing
What's the best method to water my Jerusalem thorn?
You might want to put a garden hose at the plant base to ensure that you're promoting excellent root development. Avoid directly spraying the leaves, and know that the leaves will require more watering if they are outdoors and facing direct sunlight. You can also use bubblers that you can put on to each plant to moisten the roots. Also, use soaker hoses that can cover the entire garden or bed when adding or removing plants to push the roots deeply. Drain any excess water and wait for the soil to dry before watering. Water at ground level to prevent diseases. On a sunny day, you might want to spray the entire bush with water. Whether potted or in-ground, please remember Jerusalem thorn prefers deep watering over light sprinkling.
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What should I do if I water Jerusalem thorn too much/too little?
An overwatered Jerusalem thorn can start to have leaves that turn yellow, drop off and wilt. The plant can also look dull and unhealthy, with signs of mushy stems. When they are beginning to show these signs, it's best to adjust your schedule whenever possible. The wilting can also be a sign of under watering as well. You might see that the leaves begin to turn crispy and dry while the overwatered ones will have soft wilted leaves. Check the soil when it is dry and watering is not enough, give it a full watering in time. Enough water will make the Jerusalem thorn recover again, but the plant will still appear dry and yellow leaves after a few days due to the damaged root system. Once it return to normal, the leave yellowing will stop . Always check the moisture levels at the pot when you have the Jerusalem thorn indoors. Avoid overwatering indoors and see if there are signs of black spots. If these are present, let the soil dry in the pot by giving it a few days of rest from watering. Overwatering can lead to root rot being present in your plant. If this is the case, you might want to transfer them into a different pot, especially if you see discolored and slimy roots. Always prevent root rot as much as possible, and don't let the soil become too soggy. You should dig a little deeper when you plant your Jerusalem thorn outdoors. When you check with your fingers and notice that the soil is too dry, it could mean underwatering. Adequate watering is required to help the plant recover.
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How often should I water my Jerusalem thorn?
The Jerusalem thorn likes deep and infrequent watering. You would want to soak them in a gallon of water each time, especially when they are planted in pots. The water storage of flower pots is limited and the soil will dry out faster. Watering is required every 3 to 5 days when living in a cold region. Water it early in the morning when the soil is dry, outdoors or indoors. You can also determine if watering is needed by checking the soil inside. When the top 2-3 inches of soil is dry, it is time to give the plant a full watering. During hot days, you may need to check the moisture daily, as the heat can quickly dry out the soil in the pot. Irrigation of the soil is also required if you have a garden. When you live in a hot climate, you might want to water once a week. Only water when you notice that about 2 to 3 inches of soil become too dry outdoors or indoors. Consider the amount of rainwater on the plant and ensure not to add to it to prevent root rot.You may not need additional watering of the plants if there is a lot of rainfall.Jerusalem thorn generally grows during spring and fall. When they are outdoors, you need to add mulch about 3 to 4 inches deep to conserve more water. You need to water the plants more frequently in sandy soil because this type tends to drain faster. However, with the clay one, you need to water this less frequently where you could go for 2-3 days to dry the plant and not develop any root rot. You could mark the date on the calendar whenever you water and when you notice that the leaves are starting to droop. This can mean that you might be a day late.
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How much water do I need to give my Jerusalem thorn?
The Jerusalem thorn generally needs about a gallon of water each schedule,With the potted plants, you might want to water them deeply until you see that the water is dripping at the bottom of the pot. Then, wait for the soil to dry before watering them again. You can use a water calculator or a moisture meter to determine the amount you've given to your plant in a week. Provide plenty of water, especially in the flowering period, but let the moisture evaporate afterwards to prevent root rot. If Jerusalem thorn is planted outdoor with adequate rainfall, it may not need additional watering. When Jerusalem thorn is young or newly planted, make sure it gets 1-2 inches of rain per week. As Jerusalem thorn continues to grow, it can survive entirely on rainfall. Only when the weather is too hot, or when there is no rainfall at all for 2-3 weeks, then consider giving Jerusalem thorn a full watering during the cooler moment of the day to prevent the plant from suffering from high heat damage. Additional watering will be required during persistent dry spells.
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Should I adjust the watering frequency for my Jerusalem thorn according to different seasons or climates?
The Jerusalem thorn needs outdoors come from rain, with only persistent dry weather requiring watering. Throughout the spring and fall growing seasons, the soil needs to be kept moist but not soggy, and alternating dry and moist soil conditions will allow the Jerusalem thorn to grow well. Throughout the summer, hot weather can cause water to evaporate too quickly, and if there is a lack of rainfall, you will need to water more frequently and extra to keep it moist. Usually, the Jerusalem thorn will need less water during the winter. Since the Jerusalem thorn will drop their leaves and go dormant, you can put them into a well-draining but moisture-retentive soil mixture like the terracotta to help the water evaporate quicker. Once your Jerusalem thorn growing outdoors begins to leaf out and go dormant, you can skip watering altogether and in most cases Jerusalem thorn can rely on the fall and winter rains to survive the entire dormant period. After the spring, you can cultivate your Jerusalem thorn and encourage it to grow and bloom when the temperature becomes warmer.This plant is not generally a fan of ponding or drought when flowering. You must ensure that the drainage is good at all times, especially during the winter. When the plant is in a pot, the plant has limited root growth. Keep them well-watered, especially if they are planted in pots during summer. They don't like cold and wet roots, so provide adequate drainage, especially if they are still growing. It's always best to water your Jerusalem thorn’s diligently. Get the entire root system into a deep soak at least once or twice a week, depending on the weather. It's best to avoid shallow sprinkles that reach the leaves since they generally encourage the growth of fungi and don't reach deep into the roots. Don't allow the Jerusalem thorn’s to dry out completely in the fall or winter, even if they are already dormancy. Don't drown the plants because they generally don't like sitting in water for too long. They can die during winter if the soil does not drain well. Also, apply mulch whenever possible to reduce stress, conserve water, and encourage healthy blooms.
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What should I be careful with when I water my Jerusalem thorn in different seasons, climates, or during different growing periods?
If planting in the ground, Jerusalem thorn mostly relies on rain. However, if there is no rainfall for 2-3 weeks, you may need to give proper consideration to giving the plants a deep watering. If watering Jerusalem thorn in summer, you should try to do it in the morning. A large temperature difference between the water temperature and the root system can stress the roots. You need to avoid watering the bushes when it's too hot outside. Start mulching them during the spring when the ground is not too cold. The age of the plants matter. Lack of water is one of the most common reasons the newly planted ones fail to grow. After they are established, you need to ease off the watering schedule. Reduce watering them during the fall and winter, especially if they have a water-retaining material in the soil. The dry winds in winter can dry them out, and the newly planted ones can be at risk of drought during windy winter, summer, and fall. Windy seasons mean that there's more watering required. The ones planted in the pot tend to dry out faster, so they need more watering. Once you see that they bloom less, the leaves begin to dry up. Potted plants are relatively complex to water and fluctuate in frequency. Always be careful that the pot-planted plant don't sit in the water. Avoid putting them in containers with saucers, bowls, and trays. Too much watering in the fall can make the foliage look mottled or yellowish. It's always a good idea to prevent overwatering them regardless of the current climate or season that you might have. During the months when Jerusalem thorn begins to flower, you might want to increase the watering frequency but give it a rest once they are fully grown. Give them an adequate amount of water once every 3 to 5 days but don't give them regular schedules. Make sure the soil is dry by sticking your finger in the pot, or use a moisture meter if you're unsure if it's the right time. Too much root rot can cause them to die, so be careful not to overwater or underwater regardless of the climate or season you have in your area.
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Why is watering my Jerusalem thorn important?
Watering the Jerusalem thorn helps transport the needed nutrients from the soil to the rest of the plant. The moisture will keep this species healthy if you know how much water to give. The watering requirements will depend on the weather in your area and the plant's soil. The Jerusalem thorn thrives on moist soil, but they can't generally tolerate waterlogging. Ensure to provide enough mulch when planted on the ground and never fall into the trap of watering too little. They enjoy a full can of watering where the water should be moist at the base when they are planted in a pot to get the best blooms. If they are grown as foliage, you need to water them up to a depth of 10 to 20 inches so they will continue to grow. If it's raining, refrain from watering and let them get the nutrients they need from the rainwater.
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Key Facts About Jerusalem thorn

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Attributes of Jerusalem thorn

Lifespan
Perennial
Plant Type
Tree, Shrub
Planting Time
Summer
Bloom Time
Mid spring, Late spring, Summer
Harvest Time
Mid spring, Late spring, Early summer, Mid summer, Early fall, Mid fall, Mid winter
Plant Height
2 m to 10 m
Spread
4.5 m to 6 m
Leaf Color
Green
Flower Size
2 cm
Flower Color
Yellow
Fruit Color
Green
Stem Color
Green
Dormancy
Winter dormancy
Leaf type
Deciduous
Ideal Temperature
15 - 38 ℃

Name story

Jerusalem thorn

Symbolism

Usages

Garden Use

Scientific Classification of Jerusalem thorn

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pests

Common Pests & Diseases About Jerusalem thorn

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Common issues for Jerusalem thorn based on 10 million real cases
Wilting
Wilting is a plant disease affecting Jerusalem thorn, leading to drooping, discoloring, and eventually, plant death. The disease is caused by various pathogens and unfavorable environmental conditions, and can pose a significant challenge to maintaining healthy Jerusalem thorn plants.
Scale insects
Scale insects Scale insects
Scale insects
Scale insects are generally 2 to 3 mm across and can be found in a range of colors. They often cluster near leaf veins and can be scraped off with a fingernail.
Solutions: Outdoors, the weather and natural enemies of scale insects (such as lady beetles and parasitic wasps) typically keep these pests at bay. When their numbers become abundant (or when scale insects affect indoor plants), interventions are needed. Here are some options: Dip a cotton swab in 80% isopropyl alcohol and run it over the leaves and stems to remove scale Wash leaves with a mild detergent solution (this also removes honeydew) Inspect plants weekly for additional infestations Use spot treatments of insecticidal soap or horticultural oil Remove the plant if a heavy infestation cannot be eliminated – this will prevent it from spreading to other plants Take steps to control ants that may have been attracted to the insects' honeydew
Aged yellow and dry
Aged yellow and dry Aged yellow and dry
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.
Fruit withering
Fruit withering Fruit withering
Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Solutions: There are a number of appropriate solutions to control fruit withering: Remove any fruit as soon as it shows any signs of infection. Do not compost. Use a fungicide prior to leaf bud and then as per manufacturers instructions throughout the season.
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Wilting
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Wilting Disease on Jerusalem thorn?
What is Wilting Disease on Jerusalem thorn?
Wilting is a plant disease affecting Jerusalem thorn, leading to drooping, discoloring, and eventually, plant death. The disease is caused by various pathogens and unfavorable environmental conditions, and can pose a significant challenge to maintaining healthy Jerusalem thorn plants.
Symptom Analysis
Symptom Analysis
Common symptoms include drooping and discolor[ation] of leaves and stems. In advanced stages, there's an overall decline in plant health, visible yellowing, browning, and eventual death of the Jerusalem thorn.
What Causes Wilting Disease on Jerusalem thorn?
What Causes Wilting Disease on Jerusalem thorn?
1
Bacterial pathogens
Especially aggressive in warm, moist conditions. Bacteria penetrate the plant's water transport system, hindering water movement.
2
Fungal pathogens
Some fungi block water flow within the plant system or produce toxins, leading to wilting.
3
Environmental stress
Excess heat, water stress, or poor soil conditions can also cause wilting in Jerusalem thorn.
How to Treat Wilting Disease on Jerusalem thorn?
How to Treat Wilting Disease on Jerusalem thorn?
1
Non pesticide
Improved watering practices: Avoid over or under watering, both of which can cause wilting. Ensure regular and moderate watering specifically.

Proper plant care: Maintain optimal growing conditions for Jerusalem thorn, including sunlight exposure, humidity regulation, and nutritious soil.
2
Pesticide
Fungicidal sprays: For fungal pathogens, use systemic fungicides that can be absorbed by the plant and disrupt the fungus.

Bactericidal treatments: For bacterial causes, copper-based bactericides might be effective in controlling the disease.
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Scale insects
plant poor
Scale insects
Scale insects are generally 2 to 3 mm across and can be found in a range of colors. They often cluster near leaf veins and can be scraped off with a fingernail.
Overview
Overview
Tiny, bumpy growths all over the stem of a plant is a classic sign of scale insects. These sucking insects bury their mouthparts into the leaves, fruit, or bark of trees, shrubs, and other plants. Over time, scale insects can severely damage their hosts.
Scale insects are not just one species of insects but instead are a large, diverse group of more than 8,000 individual species, including soft scales (brown soft scale, cottony maple scale, European elm scale) and armored scales (oystershell scale, euonymus scale, San Jose scale). These tiny pests may be between 3 to 10 mm in length and are closely related to whiteflies and aphids.
Despite the differences in size and appearance, the one thing that all scale insects have in common is that they grow beneath a wax covering. This covering looks somewhat like the scales of a fish or a reptile - hence the name. It protects the insect from harm.
Scale insects feed on a wide variety of plants but are most common on herbaceous ornamental plants (both indoor and outdoor) as well as numerous species of shrubs and trees. Scale insects are easy to overlook, in part because they are so small and also because they do not look like actual insects. However, it is important to take action as soon as they are noticed to ensure the health of the plants.
Symptom Analysis
Symptom Analysis
The most obvious symptom is the presence of groups of the insects themselves, which look much like bumpy growths on plants, generally quite small (less than the size of a coin). Scale insects tend to cluster together and appear all at once.
The insects hatch from eggs inside these scales and develop through two growth stages before becoming adults. Once mature, adult females produce eggs that they hide beneath their bodies. These ultimately hatch into tiny crawlers, which are yellow to orange, and begin feeding within just a day or two. They suck sap through their needle-like mouthparts and will excrete a substance called honeydew behind them as they eat.
Since the scale insectss are subtle in appearance, symptoms in the host plants may be the first sign that is noticed. As the insects eat all the plant's nutrients, leaves will drop prematurely, and the growth of plants becomes stunted. Dead or browned leaves might remain for a long period of time on the scale-killed branches.
Sooty mold can also appear on infested plants, growing in the honeydew that the insects leave behind. It is a black fungus that is fluffy and unattractive. The sooty mold growth causes plants to yellow, since it interferes with the process of photosynthesis.
Solutions
Solutions
Outdoors, the weather and natural enemies of scale insects (such as lady beetles and parasitic wasps) typically keep these pests at bay.
When their numbers become abundant (or when scale insects affect indoor plants), interventions are needed. Here are some options:
  • Dip a cotton swab in 80% isopropyl alcohol and run it over the leaves and stems to remove scale
  • Wash leaves with a mild detergent solution (this also removes honeydew)
  • Inspect plants weekly for additional infestations
  • Use spot treatments of insecticidal soap or horticultural oil
  • Remove the plant if a heavy infestation cannot be eliminated – this will prevent it from spreading to other plants
  • Take steps to control ants that may have been attracted to the insects' honeydew
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Aged yellow and dry
plant poor
Aged yellow and dry
Natural aging can cause leaves to turn yellow and dry out.
Overview
Overview
Regardless of the type of plant or where it is grown, at some point, it will begin to aged yellow and dry. This is a natural, unavoidable process that happens when the plant has completed all of the steps in its life.
Annual plants go through this process at the end of a single growing season. Perennial plants live for multiple years, if not tens or hundreds of years, but will still ultimately exhibit these symptoms.
Symptom Analysis
Symptom Analysis
When plants have progressed through their natural developmental stages and are nearing the end of their lifecycle, they begin showing signs of decline. Leaves will start to yellow and droop, and over time they turn papery brown and dry.
Once completely dry, the leaves begin to fall from the plant until the entire plant has dried out.
Disease Cause
Disease Cause
At the end of its life, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence or natural aging and death. Cell division stops, and the plant begins catabolizing resources to use in other parts of the plant.
As this happens, the tissues begin yellow and drying until the entire plant is desiccated and perishes.
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Fruit withering
plant poor
Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Overview
Overview
Fruit withering is common on many tree fruits, including apples, pears, peaches, cherries, and plums, as well as fruiting shrubs. It is caused by a fungal pathogen and will result in wrinkled and desiccated fruit.
Symptom Analysis
Symptom Analysis
Here are the most common symptoms in the order that they are likely to occur.
  1. Both leaves and blossom on the tips of branches will go brown and wither.
  2. Gray powdery patches will appear on infected leaves and flowers, and this will be most apparent after rain.
  3. Any fruit that does appear will turn wrinkled and fail to develop.
  4. Branch tips begin to die, progressing back to larger branches, causing general deterioration of the tree or plant.
Disease Cause
Disease Cause
The withering is caused by one of two fungal pathogens, one called Monilina laxa and the other called M. fructigen. The spores overwinter on infected plant material and are then spread the following spring by wind, rain, or animal vectors. The problem will start to become noticeable in mid-spring, but will increase in severity as summer progresses and the fungus grows. If not addressed, the disease will intensify and spread to other plants in the vicinity.
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distribution

Distribution of Jerusalem thorn

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Habitat of Jerusalem thorn

Semidesert vegetation, desert valleys, desert grassland zones
Northern Hemisphere
South Hemisphere

Distribution Map of Jerusalem thorn

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Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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More Info on Jerusalem Thorn Growth and Care

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Basic Care Guide
Common Pests & Diseases
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Lighting
Full sun
Jerusalem thorn thrives best in areas where it is exposed continuously to solar rays throughout the day. It can, however, withstand conditions with a moderate reduction in light intensity. Lack or excess sunlight might affect healthy growth, which reflects its nature of originating from environments with abundant daily sunlight.
Best Sunlight Practices
Transplant
15-25 feet
The best time to transplant jerusalem thorn is during mid to late spring, as this period encourages strong root establishment before the hot summer months. It's optimal to place the plant in a location with full sun exposure. Care should be taken to ensure the soil drains well. Transplanting jerusalem thorn is a simple task, but remember to handle with care to prevent damaging the root system.
Transplant Techniques
Temperature
-5 - 43 ℃
Jerusalem thorn prefers temperatures ranging from 59 to 100 ℉ (15 to 38 ℃). Its native growth environment includes arid and semi-arid regions with hot summers and mild winters. During the summer, ensure the plant is adequately watered and protected from excessive heat exposure. In winter, protect the plant from frost and avoid overwatering.
Temp for Healthy Growth
Pruning
Spring, Winter
Characterized by its bright yellow flowers and delicate foliage, jerusalem thorn should be pruned early spring or late winter. Key techniques include thinning out crowded branches and removing dead or damaged wood to promote health and shape. During pruning, cut just above leaf nodes at a 45-degree angle. Pruning enhances flowering, prevents overgrowth, and maintains a visually pleasing form. In regions with strong winds, pruning also reduces the risk of damage to the main structure.
Pruning techniques
Propagation
The best time to propagate jerusalem thorn by cuttings is during the cooler autumn months. This enables the cuttings to root without the stress of extreme summer heat, while still giving them ample time to establish before winter. Optimal rooting occurs with warm soil temperatures and mild ambient conditions, which autumn typically provides, fostering strong root development for spring growth.
Jerusalem thorn is propagated using a variety of methods such as hardwood cuttings, layering (air), and sowing seeds. Propagation during autumn and winter is ideal. Propagation difficulty is low, and signs of successful propagation include the appearance of new shoots or roots. Key propagation-related tips include utilizing rooting hormone and ensuring proper soil moisture levels.
Propagation Techniques
Wilting
Wilting is a plant disease affecting Jerusalem thorn, leading to drooping, discoloring, and eventually, plant death. The disease is caused by various pathogens and unfavorable environmental conditions, and can pose a significant challenge to maintaining healthy Jerusalem thorn plants.
Read More
stem brown spot
Brown spot is a fungal disease affecting Jerusalem thorn, also known as Jerusalem thorn, leading to leaf spots, wilting, and potential death of the plant. It poses a significant threat to ornamental and shade trees, caused by the pathogen Bipolaris oryzae.
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Underwatering yellow
Underwatering is a plant disease caused by inadequate water amounts, negatively impacting Jerusalem thorn's growth and vitality. It leads to stunted growth, yellow leaves, and potential plant death if not addressed timely.
Read More
Plant dried up
Plant dried up disease generally occurs when Jerusalem thorn is subjected to drought, high salinity, and high temperatures, drastically affecting its growth. Yellowing and wilting of leaves, followed by the whole plant drying are some visible impacts. Additionally, poorly aerated soil can worsen the disease.
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Powdery mildew
Powdery mildew is a widespread fungal disease that significantly affects Jerusalem thorn, leading to coating of leaves, stems, and buds with white powdery spots, which in severe cases, can lead to retardation in plant growth and even plant death.
Read More
Crown gall
Crown gall is a bacterial disease that affects Jerusalem thorn, leading to tumorous growths mainly on the roots and, occasionally, on the stems. It stunts growth, compromises vigor, and can lead to plant death when severe.
Read More
Feng shui direction
East
The jerusalem thorn plant harmonizes well in an east-facing direction, an area associated with family and health in Feng Shui. The plant's lively green leaves and delicate thorns instill positive chi, potentially fostering harmony and wellness. However, exact effects may vary based on personal chi dynamics and other environmental factors.
Fengshui Details
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Plants Related to Jerusalem thorn

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Pale Meadow Beauty
Pale Meadow Beauty
Pale Meadow Beauty (Rhexia mariana) is a perennial flowering herb native to the eastern and midwestern United States. Pale Meadow Beauty is used in landscaping and is often planted along roadsides.
Creeping groundsel
Creeping groundsel
Creeping groundsel (Senecio angulatus) is a twining vine that can grow to 6 m long. Large leaves are pale green and glossy. It will grow low as a shrub or grow as a vine along a trellis, fence or garden wall. Blooms in spring with clusters of bright yellow, daisy-like flowers. It can be invasive, climbing into trees and smothering smaller plants and shrubs.
Barbados nut
Barbados nut
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Camphorweed
Camphorweed
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Hyssop-leaf sandmat
Hyssop-leaf sandmat
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Pussyfoot
Pussyfoot
Praxelis clematidea is native to South America but has been introduced elsewhere in the world and is now considered an invasive weed in Australia and North America. Because it produces many small seeds which are capable of floating on the wind or becoming attached to passing animals, pussyfoot has been able to prolifically propagate itself.
Poison ivy
Poison ivy
In pop culture, poison ivy is a symbol of an obnoxious weed because, despite its unthreatening looks, it gives a highly unpleasant contact rash to the unfortunate person who touches it. Still, it is commonly eaten by many animals, and the seeds are a favorite with birds. The leaves turn bright red in fall. Its sister species, Western poison ivy (Toxicodendron rydbergii), is not considered to be invasive in the United States, but is noxious in Australia and New Zealand.
Pokeweed
Pokeweed
Although its berries look juicy and tempting, the fruits and the root of pokeweed are toxic and should not be eaten. 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.
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About
Care Guide
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Related Plants
Jerusalem thorn
Jerusalem thorn
Jerusalem thorn
Jerusalem thorn
Jerusalem thorn
Jerusalem thorn
Jerusalem thorn
Parkinsonia aculeata
Also known as: Mexican palo verde, Palo de rayo
Planting Time
Planting Time
Summer
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Care Guide for Jerusalem thorn

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Questions About Jerusalem thorn

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Watering Watering Watering
Pruning Pruning Pruning
Sunlight Sunlight Sunlight
Temperature Temperature Temperature
Fertilizing Fertilizing Fertilizing
What's the best method to water my Jerusalem thorn?
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What should I do if I water Jerusalem thorn too much/too little?
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How often should I water my Jerusalem thorn?
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How much water do I need to give my Jerusalem thorn?
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Should I adjust the watering frequency for my Jerusalem thorn according to different seasons or climates?
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What should I be careful with when I water my Jerusalem thorn in different seasons, climates, or during different growing periods?
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Why is watering my Jerusalem thorn important?
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plant_info

Key Facts About Jerusalem thorn

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Attributes of Jerusalem thorn

Lifespan
Perennial
Plant Type
Tree, Shrub
Planting Time
Summer
Bloom Time
Mid spring, Late spring, Summer
Harvest Time
Mid spring, Late spring, Early summer, Mid summer, Early fall, Mid fall, Mid winter
Plant Height
2 m to 10 m
Spread
4.5 m to 6 m
Leaf Color
Green
Flower Size
2 cm
Flower Color
Yellow
Fruit Color
Green
Stem Color
Green
Dormancy
Winter dormancy
Leaf type
Deciduous
Ideal Temperature
15 - 38 ℃
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Name story

Jerusalem thorn

Symbolism

Usages

Garden Use

Scientific Classification of Jerusalem thorn

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pests

Common Pests & Diseases About Jerusalem thorn

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Common issues for Jerusalem thorn based on 10 million real cases
Wilting
Wilting is a plant disease affecting Jerusalem thorn, leading to drooping, discoloring, and eventually, plant death. The disease is caused by various pathogens and unfavorable environmental conditions, and can pose a significant challenge to maintaining healthy Jerusalem thorn plants.
Learn More About the Wilting more
Scale insects
Scale insects Scale insects Scale insects
Scale insects are generally 2 to 3 mm across and can be found in a range of colors. They often cluster near leaf veins and can be scraped off with a fingernail.
Solutions: Outdoors, the weather and natural enemies of scale insects (such as lady beetles and parasitic wasps) typically keep these pests at bay. When their numbers become abundant (or when scale insects affect indoor plants), interventions are needed. Here are some options: Dip a cotton swab in 80% isopropyl alcohol and run it over the leaves and stems to remove scale Wash leaves with a mild detergent solution (this also removes honeydew) Inspect plants weekly for additional infestations Use spot treatments of insecticidal soap or horticultural oil Remove the plant if a heavy infestation cannot be eliminated – this will prevent it from spreading to other plants Take steps to control ants that may have been attracted to the insects' honeydew
Learn More About the Scale insects more
Aged yellow and dry
Aged yellow and dry Aged yellow and dry 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.
Learn More About the Aged yellow and dry more
Fruit withering
Fruit withering Fruit withering Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Solutions: There are a number of appropriate solutions to control fruit withering: Remove any fruit as soon as it shows any signs of infection. Do not compost. Use a fungicide prior to leaf bud and then as per manufacturers instructions throughout the season.
Learn More About the Fruit withering more
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Wilting
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Wilting Disease on Jerusalem thorn?
What is Wilting Disease on Jerusalem thorn?
Wilting is a plant disease affecting Jerusalem thorn, leading to drooping, discoloring, and eventually, plant death. The disease is caused by various pathogens and unfavorable environmental conditions, and can pose a significant challenge to maintaining healthy Jerusalem thorn plants.
Symptom Analysis
Symptom Analysis
Common symptoms include drooping and discolor[ation] of leaves and stems. In advanced stages, there's an overall decline in plant health, visible yellowing, browning, and eventual death of the Jerusalem thorn.
What Causes Wilting Disease on Jerusalem thorn?
What Causes Wilting Disease on Jerusalem thorn?
1
Bacterial pathogens
Especially aggressive in warm, moist conditions. Bacteria penetrate the plant's water transport system, hindering water movement.
2
Fungal pathogens
Some fungi block water flow within the plant system or produce toxins, leading to wilting.
3
Environmental stress
Excess heat, water stress, or poor soil conditions can also cause wilting in Jerusalem thorn.
How to Treat Wilting Disease on Jerusalem thorn?
How to Treat Wilting Disease on Jerusalem thorn?
1
Non pesticide
Improved watering practices: Avoid over or under watering, both of which can cause wilting. Ensure regular and moderate watering specifically.

Proper plant care: Maintain optimal growing conditions for Jerusalem thorn, including sunlight exposure, humidity regulation, and nutritious soil.
2
Pesticide
Fungicidal sprays: For fungal pathogens, use systemic fungicides that can be absorbed by the plant and disrupt the fungus.

Bactericidal treatments: For bacterial causes, copper-based bactericides might be effective in controlling the disease.
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Scale insects
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Scale insects
Scale insects are generally 2 to 3 mm across and can be found in a range of colors. They often cluster near leaf veins and can be scraped off with a fingernail.
Overview
Overview
Tiny, bumpy growths all over the stem of a plant is a classic sign of scale insects. These sucking insects bury their mouthparts into the leaves, fruit, or bark of trees, shrubs, and other plants. Over time, scale insects can severely damage their hosts.
Scale insects are not just one species of insects but instead are a large, diverse group of more than 8,000 individual species, including soft scales (brown soft scale, cottony maple scale, European elm scale) and armored scales (oystershell scale, euonymus scale, San Jose scale). These tiny pests may be between 3 to 10 mm in length and are closely related to whiteflies and aphids.
Despite the differences in size and appearance, the one thing that all scale insects have in common is that they grow beneath a wax covering. This covering looks somewhat like the scales of a fish or a reptile - hence the name. It protects the insect from harm.
Scale insects feed on a wide variety of plants but are most common on herbaceous ornamental plants (both indoor and outdoor) as well as numerous species of shrubs and trees. Scale insects are easy to overlook, in part because they are so small and also because they do not look like actual insects. However, it is important to take action as soon as they are noticed to ensure the health of the plants.
Symptom Analysis
Symptom Analysis
The most obvious symptom is the presence of groups of the insects themselves, which look much like bumpy growths on plants, generally quite small (less than the size of a coin). Scale insects tend to cluster together and appear all at once.
The insects hatch from eggs inside these scales and develop through two growth stages before becoming adults. Once mature, adult females produce eggs that they hide beneath their bodies. These ultimately hatch into tiny crawlers, which are yellow to orange, and begin feeding within just a day or two. They suck sap through their needle-like mouthparts and will excrete a substance called honeydew behind them as they eat.
Since the scale insectss are subtle in appearance, symptoms in the host plants may be the first sign that is noticed. As the insects eat all the plant's nutrients, leaves will drop prematurely, and the growth of plants becomes stunted. Dead or browned leaves might remain for a long period of time on the scale-killed branches.
Sooty mold can also appear on infested plants, growing in the honeydew that the insects leave behind. It is a black fungus that is fluffy and unattractive. The sooty mold growth causes plants to yellow, since it interferes with the process of photosynthesis.
Solutions
Solutions
Outdoors, the weather and natural enemies of scale insects (such as lady beetles and parasitic wasps) typically keep these pests at bay.
When their numbers become abundant (or when scale insects affect indoor plants), interventions are needed. Here are some options:
  • Dip a cotton swab in 80% isopropyl alcohol and run it over the leaves and stems to remove scale
  • Wash leaves with a mild detergent solution (this also removes honeydew)
  • Inspect plants weekly for additional infestations
  • Use spot treatments of insecticidal soap or horticultural oil
  • Remove the plant if a heavy infestation cannot be eliminated – this will prevent it from spreading to other plants
  • Take steps to control ants that may have been attracted to the insects' honeydew
Prevention
Prevention
To prevent scale insects from affecting plants, take the following steps:
  • Carefully inspect plants before purchasing, checking every stem and leaf for signs of scale
  • Make traps for new insects by leaving double-sided tape near stems and branches
  • Ensure that plants have a good growing environment, monitoring both moisture and sunlight levels
  • Introduce small parasitic wasps and other predators to the garden
  • Rinse small plants when foliage becomes dusty
  • Prune weak areas of a plant to eliminate potential infestation hot spots
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Aged yellow and dry
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Aged yellow and dry
Natural aging can cause leaves to turn yellow and dry out.
Overview
Overview
Regardless of the type of plant or where it is grown, at some point, it will begin to aged yellow and dry. This is a natural, unavoidable process that happens when the plant has completed all of the steps in its life.
Annual plants go through this process at the end of a single growing season. Perennial plants live for multiple years, if not tens or hundreds of years, but will still ultimately exhibit these symptoms.
Symptom Analysis
Symptom Analysis
When plants have progressed through their natural developmental stages and are nearing the end of their lifecycle, they begin showing signs of decline. Leaves will start to yellow and droop, and over time they turn papery brown and dry.
Once completely dry, the leaves begin to fall from the plant until the entire plant has dried out.
Disease Cause
Disease Cause
At the end of its life, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence or natural aging and death. Cell division stops, and the plant begins catabolizing resources to use in other parts of the plant.
As this happens, the tissues begin yellow and drying until the entire plant is desiccated and perishes.
Solutions
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.
Prevention
Prevention
Unfortunately, there is no way to prevent plants from dying of “old age.” To help prolong their life, and put off symptoms of aged yellow and dry for as long as possible, take care of them by giving them enough water, fertilizing them appropriately, and making sure they get enough sunlight.
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Fruit withering
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Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Overview
Overview
Fruit withering is common on many tree fruits, including apples, pears, peaches, cherries, and plums, as well as fruiting shrubs. It is caused by a fungal pathogen and will result in wrinkled and desiccated fruit.
Symptom Analysis
Symptom Analysis
Here are the most common symptoms in the order that they are likely to occur.
  1. Both leaves and blossom on the tips of branches will go brown and wither.
  2. Gray powdery patches will appear on infected leaves and flowers, and this will be most apparent after rain.
  3. Any fruit that does appear will turn wrinkled and fail to develop.
  4. Branch tips begin to die, progressing back to larger branches, causing general deterioration of the tree or plant.
Disease Cause
Disease Cause
The withering is caused by one of two fungal pathogens, one called Monilina laxa and the other called M. fructigen. The spores overwinter on infected plant material and are then spread the following spring by wind, rain, or animal vectors. The problem will start to become noticeable in mid-spring, but will increase in severity as summer progresses and the fungus grows. If not addressed, the disease will intensify and spread to other plants in the vicinity.
Solutions
Solutions
There are a number of appropriate solutions to control fruit withering:
  1. Remove any fruit as soon as it shows any signs of infection. Do not compost.
  2. Use a fungicide prior to leaf bud and then as per manufacturers instructions throughout the season.
Prevention
Prevention
Preventative measures include:
  1. Ensuring adequate spacing between plants or trees.
  2. Staking plants that are prone to tumbling to prevent moisture or humidity build up.
  3. Prune correctly so that there is adequate air movement and remove any dead or diseased branches that may carry spores.
  4. Practice good plant hygiene by removing fallen material and destroying it as soon as possible.
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distribution

Distribution of Jerusalem thorn

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Habitat of Jerusalem thorn

Semidesert vegetation, desert valleys, desert grassland zones
Northern Hemisphere
South Hemisphere

Distribution Map of Jerusalem thorn

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Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
care_scenes

More Info on Jerusalem Thorn Growth and Care

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Basic Care Guide
Common Pests & Diseases
Explore More
Wilting
Wilting is a plant disease affecting Jerusalem thorn, leading to drooping, discoloring, and eventually, plant death. The disease is caused by various pathogens and unfavorable environmental conditions, and can pose a significant challenge to maintaining healthy Jerusalem thorn plants.
 detail
stem brown spot
Brown spot is a fungal disease affecting Jerusalem thorn, also known as Jerusalem thorn, leading to leaf spots, wilting, and potential death of the plant. It poses a significant threat to ornamental and shade trees, caused by the pathogen Bipolaris oryzae.
 detail
Underwatering yellow
Underwatering is a plant disease caused by inadequate water amounts, negatively impacting Jerusalem thorn's growth and vitality. It leads to stunted growth, yellow leaves, and potential plant death if not addressed timely.
 detail
Plant dried up
Plant dried up disease generally occurs when Jerusalem thorn is subjected to drought, high salinity, and high temperatures, drastically affecting its growth. Yellowing and wilting of leaves, followed by the whole plant drying are some visible impacts. Additionally, poorly aerated soil can worsen the disease.
 detail
Powdery mildew
Powdery mildew is a widespread fungal disease that significantly affects Jerusalem thorn, leading to coating of leaves, stems, and buds with white powdery spots, which in severe cases, can lead to retardation in plant growth and even plant death.
 detail
Crown gall
Crown gall is a bacterial disease that affects Jerusalem thorn, leading to tumorous growths mainly on the roots and, occasionally, on the stems. It stunts growth, compromises vigor, and can lead to plant death when severe.
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Lighting
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Indoor
Indoor
Outdoor
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Requirements
Full sun
Ideal
Above 6 hours sunlight
Partial sun
Tolerance
About 3-6 hours 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
Jerusalem thorn thrives best in areas where it is exposed continuously to solar rays throughout the day. It can, however, withstand conditions with a moderate reduction in light intensity. Lack or excess sunlight might affect healthy growth, which reflects its nature of originating from environments with abundant daily sunlight.
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.
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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
Jerusalem thorn thrives in full sunlight but is sensitive to heat. As a plant commonly grown outdoors with abundant sunlight, it may exhibit subtle symptoms of light deficiency when placed in rooms with suboptimal lighting.
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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 jerusalem thorn 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
Jerusalem thorn 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 ensure optimal growth, gradually move plants to a sunnier location each week, until they receive at least 6 hours of direct sunlight daily. Use a south-facing window and keep curtains open during the day for maximum sunlight exposure and nutrient accumulation.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
Jerusalem thorn thrives in full sun exposure but is sensitive to heat. Although sunburn symptoms occasionally occur, they are unable to withstand intense sunlight in high-temperature environments.
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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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Temperature
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Indoor
Outdoor
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Requirements
Ideal
Tolerable
Unsuitable
Just like people, each plant has its own preferences. Learn about your plants' temperature needs and create a comforting environment for them to flourish. As you care for your plants, your bond with them will deepen. Trust your intuition as you learn about their temperature needs, celebrating the journey you share. Lovingly monitor the temperature around your plants and adjust their environment as needed. A thermometer can be your ally in this heartfelt endeavor. Be patient and gentle with yourself as you explore your plants' temperature needs. Cherish your successes, learn from challenges, and nurture your garden with love, creating a haven that reflects the warmth of your care.
Essentials
Jerusalem thorn prefers temperatures ranging from 59 to 100 ℉ (15 to 38 ℃). Its native growth environment includes arid and semi-arid regions with hot summers and mild winters. During the summer, ensure the plant is adequately watered and protected from excessive heat exposure. In winter, protect the plant from frost and avoid overwatering.
Regional wintering strategies
Jerusalem thorn has some cold tolerance and generally does not require any additional measures when the temperature is above {Tolerable_growing_temperature_min}. However, if the temperature is expected to drop below {Tolerable_growing_temperature_min}, it is necessary to take some temporary measures for cold protection, such as wrapping the plant with plastic film, fabric, or other materials. Once the temperature rises again, the protective measures should be removed promptly.
Important Symptoms
Symptoms of Low Temperature in Jerusalem thorn
Jerusalem thorn has moderate tolerance to low temperatures and thrives best when the temperature is above {Suitable_growth_temperature_min}. During winter, it should be kept above {Tolerable_growing_temperature_min}. When the temperature falls below {Limit_growth_temperature}, the leaves may start to droop. In mild cases, they can recover, but in severe cases, the leaves will wilt and eventually fall off.
Solutions
Trim off the frost-damaged parts. Prior to encountering low temperatures again, wrap the plant with materials such as non-woven fabric or cloth, and construct a wind barrier to protect it from the cold wind.
Symptoms of High Temperature in Jerusalem thorn
During summer, Jerusalem thorn should be kept below {Suitable_growth_temperature_max}. When the temperature exceeds {Tolerable_growing_temperature_max}, the color of the leaves becomes lighter, the leaf tips may become dry and withered, the leaves may curl, and the plant becomes more susceptible to sunburn.
Solutions
Trim away the sunburned and dried-up parts. Move the plant to a location that provides shade from the midday and afternoon sun, or use a shade cloth to create shade. Water the plant in the morning and evening to keep the soil moist.
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