Rhus chinensis
Chinese gall · Nutgall · Nutgalltree · Chinese sumac · Nutgal sumac
Description
Source: leafsnapRhus chinensis, the Chinese sumac or nutgall tree, is a deciduous shrub or small tree in the genus Rhus. Growing to 6 m (20 ft) tall, it has downy shoots and leaves comprising several leaflets. These turn red in autumn before falling.The plant is common in East and South Asia, and is cultivated as an ornamental in temperate climates. Galls produced on the species that are called Chinese gall, Galla Chinensis, or Wu Bei Zi (五倍子) in Chinese, are a source of gallotannins, molecules of hydrolyzable tannins. Infestation of the tree by Chinese sumac aphids (Melaphis chinensis Bell) may lead to production of a gall that is valued as a commercial product in China. Chinese galls are used in traditional Chinese medicine for coughs, diarrhea, night sweats, dysentery, and intestinal and uterine bleeding. Some research has suggested that chemical compounds found in Rhus chinensis possess in vitro antiviral, antibacterial, anticancer, hepatoprotective, antidiarrheal, and antioxidant activities. However, this evidence is not substantiated by multiple international researchers. The aqueous extracts of the gall also inhibit alpha-glucosidase activity in vitro.
🌳 Chinese sumac offers benefits beyond its apparent uses. Its leaves contain tannins that can be used to make natural dyes for the textile industry. Additionally, studies indicate that the presence of Chinese sumac may reflect soil quality, acting as a natural bioindicator for certain metallic elements, which underscores its ecological and industrial importance.
Care Guide
💧 Water Every 7 days
Chinese sumac thrives in areas with moderate rainfall and typically needs watering every 1-2 weeks. As a deciduous plant, it sheds its leaves during dry seasons to conserve water. This plant exhibits a balanced water preference, as it is neither tolerant of drought nor suited to overly humid conditions.
How should I water my Chinese sumac the best way?
To ensure optimal root development for your plants, consider using a garden hose at the base rather than directly spraying the leaves. If your plants are outdoor and exposed to direct sunlight, bear in mind that the leaves will require more water. One option to moisten the roots is to use bubblers for each plant. Additionally, soaker hoses can be useful in covering the whole garden or bed when adding or removing plants, as they encourage deep root growth. Remember to drain excess water and allow the soil to dry before watering again. To prevent diseases, water at ground level rather than on the leaves. On sunny days, consider spraying the entire bush with water. It's important to note that whether your Chinese sumac is potted or in-ground, it prefers deep watering rather than light sprinkling.
What should I do if I give too much or too little water to Chinese sumac?
If you notice that leaves of an overwatered Chinese sumac turn yellow, drop off, and wilt, it's a sign that the plant is not healthy. Mushy stems and a dull appearance also indicate excessive watering. When these signs appear, it's important to adjust your watering schedule. Wilting can also be a sign of under watering, characterized by crispy and dry leaves. In such cases, it is necessary to check the soil moisture and provide sufficient watering when it is dry. However, after a few days of recovery, the plant may still appear dry with yellow leaves due to root damage. Normal leaf coloration will return once the plant has fully recovered. If you have a Chinese sumac indoors, regularly check the moisture levels and avoid overwatering, looking out for signs of black spots. If present, allow the soil to dry out by refraining from watering for a few days. Overwatering can cause root rot, which is indicated by discolored and slimy roots. If this occurs, consider transferring the plant to a different pot and prevent root rot by not letting the soil become too soggy. When planting the Chinese sumac outdoors, ensure that the soil is adequately watered if it feels too dry when checked with your fingers.
How often do I need to water my Chinese sumac plant?
The Chinese sumac prefers deep and infrequent watering, especially if they are planted in pots. The limited water storage in pots causes the soil to dry out quickly. In colder regions, you should water them every 3 to 5 days, watering in the morning when the soil is dry. You can check if watering is needed by observing the top 2-3 inches of soil; if it's dry, it's time to water. On hot days, monitor the moisture daily to prevent the soil from drying out. In gardens, irrigation is necessary in hot climates, typically once a week. You should only water the plants when the top 2-3 inches of soil are too dry. Consider rainfall and avoid overwatering to prevent root rot. Chinese sumacs generally grow during spring and fall, and when planted outdoors, adding a 3-4 inch layer of mulch helps conserve water. Sandy soil drains faster and requires more frequent watering, while clay soil needs less frequent watering to avoid root rot. Keep track of watering dates and look out for drooping leaves as an indication of watering needs.
How should I water my Chinese sumac?
The Chinese sumac generally needs about a gallon of water on a regular schedule. For potted plants, water them deeply until water drips from the bottom of the pot, then wait for the soil to dry before watering again. You can use a water calculator or moisture meter to track how much water you've given your plant in a week. It's important to provide plenty of water during the flowering period, but allow the moisture to evaporate afterwards to prevent root rot. If you have planted Chinese sumac outdoors and there is sufficient rainfall, you may not need to water it additionally. However, when the sumac is young or newly planted, make sure it receives 1-2 inches of rain per week. As the sumac grows, it can rely solely on rainfall. Only consider watering it fully during cooler times of the day if the weather is very hot or if there has been no rain for 2-3 weeks to prevent damage from high heat. Additional watering will be necessary during extended dry periods.
Do I need to change how often I water my Chinese sumac depending on the season or weather?
The Chinese sumac needs to be watered when there is not enough rain, especially during dry weather. In the spring and fall, the soil should be kept moist but not too wet. Alternating between dry and moist soil conditions helps the Chinese sumac grow well. During summer, hot weather can cause water to evaporate quickly, so you may need to water more often to keep the soil moist. In winter, the Chinese sumac needs less water because it becomes dormant and drops its leaves. A well-draining soil mixture like terracotta can help the water evaporate quickly during this time. Once the Chinese sumac begins to leaf out and go dormant again, you can rely on fall and winter rains to provide enough moisture. When the Chinese sumac is in a pot, it has limited root growth, so it should be kept well-watered, especially in summer. Good drainage is important, as the plant does not like cold and wet roots. Deep soaking the entire root system once or twice a week is best, rather than shallow sprinkles that only reach the leaves. Even during dormancy, the Chinese sumac should not be allowed to dry out completely in the fall or winter. Be careful not to drown the plants by leaving them sitting in water for too long, as this can cause them to die. Applying mulch can help reduce stress, conserve water, and promote healthy blooms.
☀️ Light Full sun
The Chinese sumac performs best with abundant sunlight, though it can also tolerate spots with moderate light. Its natural hardiness stems from originating in sun-rich habitats. Too much or too little light can damage its health and negatively affect its growth.
How many hours per day should Chinese sumac get sunlight to grow healthily?
To ensure healthy growth, Chinese sumac needs a minimum of 3–6 hours of daily sun. However, it's worth noting that most plants that can tolerate partial sun can also thrive in full sun. The reason is that these plants need less light for photosynthesis, making them more adaptable compared to plants that specifically require full sun or partial shade.
What kind of sunlight does Chinese sumac require?
Chinese sumac prefers full or partial sun. It thrives with direct morning light, but during summer, it requires shielding from the intense afternoon sun. In moderate climates, excessive afternoon sun can scorch the leaves, causing harm to the plant's overall look and well-being.
Can the sun harm Chinese sumac? How can I protect Chinese sumac from sun and heat damage?
Chinese sumac, when moved from indoors to outdoors, is prone to damage from direct sunlight. To prevent sunburns, it is advisable to gradually move the pots from shaded areas to brighter spots. However, even plants acclimated to the sun can suffer from extreme heat. To combat this, it is crucial to keep the soil consistently moist during heatwaves. Providing afternoon shade or using a shade cloth can offer protection to sensitive Chinese sumac plants in containers during extreme weather.
Should I protect Chinese sumac from the sun?
Chinese sumac benefits from bright morning sun and some full sun exposure, but the harsh midday sun in the summer can be overwhelming for it. If the plant is in the ground, it can gradually adjust to the increasing intensity of the summer sun throughout the season. However, if the plant is in a pot and has been indoors or in a protected area, it can get damaged if suddenly exposed to direct summer sun in the hottest part of the day. To protect the plant from this intense afternoon sun, it is recommended to plant or place it in an understory location where taller trees, plants, or buildings provide shade during midday.
What will happen if Chinese sumac doesn't get enough sunlight?
Chinese sumac may become pale green or display drooping, yellow leaves when they don't receive enough sun. While some leaf drop is normal, if leaves are falling without new ones growing back, it indicates a problem. Additionally, if Chinese sumac isn't getting enough light, any new growth it does produce will likely be weak, pale, and susceptible to insects. Paying attention to these signs and adjusting the plant's lighting conditions can greatly improve its health.
🌡️ Temperature 15–35°C
Chinese sumac originates from areas where temperatures commonly fall between 59 and 95°F (15 and 35°C). It prefers mild to warm conditions, and during colder times it’s advisable to move it to a slightly warmer location to preserve the plant’s health.
What is the best temperature for Chinese sumac?
The best temperature range for Chinese sumac to thrive is between 65 and 80℉ (18 and 27℃). During the primary growing phase, the highest temperature it can tolerate is 95℉ (35℃), while the lowest tolerable temperature is 15℉ (-10℃). Chinese sumac is known for its ability to withstand freezing winters. To summarize the temperature preferences, the perfect range is 65-80℉ (18-27℃), the highest range is 85-95℉ (30-35℃), and the lowest range is -5 to 15℉ (-20 to -10℃) or below.
Do I need to change the temperature for Chinese sumac as it grows in different stages?
According to research, Chinese sumac shows signs of slow growth when exposed to prolonged periods of higher temperatures. This is particularly evident during the development of axillary buds and main shoots. To promote healthy growth after germination or transplanting, it is recommended to maintain consistent and cooler temperatures, around 65℉ (18℃).
How can I make sure the Chinese sumac stays warm during cold seasons?
Chinese sumac is able to survive freezing temperatures when planted directly in the ground, as long as the temperature does not drop below 15℉(-10℃) during winter. However, if planted in pots or containers, special care must be taken to protect the roots from the cold. This can be done by wrapping the container in a blanket or by bringing it indoors where it will be completely shielded from the harsh winter conditions.
If the temperature is too high or too low, what harm will Chinese sumac experience?
Consistently high temperatures are more harmful to Chinese sumac than consistently low temperatures. When it gets too hot, the plant's seed germination and photosynthesis efficiency decrease due to hormone triggers caused by heat stress. This can be observed through signs like wilting, leaf browning, and even death. On the other hand, if Chinese sumac gets too cold, important plant functions like nutrient uptake and photosynthesis stop, potentially leading to the plant's death. Additionally, a single freezing event during the growing season can cause a membrane phase transition, also resulting in the cessation of plant functions and eventual death.
What should I remember about temperature for Chinese sumac?
To ensure the health and growth of Chinese sumac, maintaining a consistent soil temperature is crucial. This can be achieved by regularly watering, applying mulch to bare soil, and planting in shaded areas. Following these strategies promotes successful budding, flowering, and new growth.
💨 Humidity
🪴 Soil 6-7
🌱 Fertilizer
The timing of fertilizing Chinese sumac is important. Apply fertilizer in early spring and repeat it monthly until early summer. Fertilizer encourages attractive blooms and supplies energy during both dormant and active growth stages.
Why do I have to put fertilizer on my Chinese sumac plant?
There are several important reasons to fertilize a Chinese sumac. One obvious reason is that it helps produce beautiful blooms. Fertilizing in early spring is best for ensuring excellent flowers during that season. Additionally, fertilizer gives the sumac energy that it can store in the ground during dormant growth phases. Providing extra nutrients during fall planting or late spring helps the sumac hold more energy for active growth.
When should I put fertilizer on my Chinese sumac to make it grow better?
To effectively fertilize Chinese sumac, timing is crucial. Applying fertilizer too early, when the Chinese sumac is still dormant, leads to ineffective usage and runoff, causing waste and pollution. It is recommended to apply the first round of fertilizer in early spring, followed by monthly applications until early summer.
When is the best time to not put fertilizer on my Chinese sumac?
To care for Chinese sumac, it is important to choose a fertilizer with a lower level of nitrogen compared to other nutrients. Excessive nitrogen can lead to an abundance of leaves but few blooms. Avoid fertilizing after early autumn, as this may cause excessive growth before winter. Additionally, refrain from fertilizing during hot and dry periods, as dry soil is not as effective in delivering nutrients. Fertilizing at this time may also stimulate growth that requires more water, which may not be readily available. Ideally, fertilize the tree or shrub earlier in the season when temperatures are cooler. Lastly, be mindful that Chinese sumac can absorb fertilizer from nearby plants or lawns, so take care to avoid inadvertently giving it a double-dose of fertilizer.
What kind of plant food should I use for my Chinese sumac?
For a Chinese sumac, the best fertilizer is one with a balanced mix of nutrients, slightly higher in phosphorus. Gardeners can also improve the soil by adding organic materials like compost, worm castings, and manure. When flower buds start to appear, experienced gardeners may use water-soluble fertilizers with phosphorus, enhancing flower development, size, and bloom duration. Fertilizers can come in various forms, but liquid or powdered ones are the best for Chinese sumac. Regardless of the form, it is important to dilute the fertilizer and apply it while watering the plant.
How should I fertilize my Chinese sumac?
When using fertilizer for your Chinese sumac, it's important to follow the specific directions and do some research. Over-fertilizing can be harmful, so determining the correct amount is crucial. A general guideline is to use the age of the tree or the diameter of the trunk to determine the amount of fertilizer to use. Typically, use one-tenth of a pound of fertilizer per year or per inch of trunk, but no more than one pound. Granular and organic fertilizers like blood meal should be applied by sprinkling around the tree's base, extending to the drip line. Avoid letting the fertilizer come in contact with the trunk. The granules will break down over time and seep into the soil, where the roots can absorb them. After fertilizing, spread a one-inch layer of compost around the base of the tree and water thoroughly.
🪴 Pot & Repot
✂️ Pruning
The Chinese sumac is known for its striking foliage and clusters of white flowers. To ensure healthy growth, it is important to prune the plant in the spring. Begin by removing any dead branches and thinning out crowded areas to improve air circulation. Regular pruning helps maintain the plant's size, enhances its appearance, and reduces the risk of disease. Additionally, make sure your tools are clean and sharp for the most effective pruning.
🌿 Propagating
🐛 Diseases & pets
☠️ Toxicity
Characteristics
- Plant Type
- Tree, Shrub
- Life Cycle
- Perennial
- Genus
- Rhus
- Family
- Anacardiaceae
- Hardiness Zone
- 7-10
- Mature Height
- 4.57 m to 7.32 m
- Mature Spread
- 4.57 m to 6.1 m
- Leaf Color
- Green, Yellow, Red, Gold, Orange
- Leaf Type
- Deciduous
- Flower Color
- White
- Flower Size
- 15.24 cm
- Bloom Time
- Early summer, Mid summer
- Planting Time
- Winter, Spring, Summer
- Harvest Time
- Mid summer, Late summer
- Native Area
- India, Malaysia, Cambodia, Vietnam, Myanmar, Japan, Koppen, Bhutan, Pakistan, Laos, South Korea, Thailand, China