How to grow a Radermachera sinica? Detailed guide to cultivation methods and precautions

Radermachera sinica is an ornamental plant often seen in many home and office environments, but many people do not know the cultivation methods and precautions for Radermachera sinica. Below, the editor will introduce the cultivation methods and precautions for Radermachera sinica in detail. Let us take a look together.

Growth habits of Radermachera sinica

Radermachera sinica likes high temperatures, high humidity, and sunny environments; it tolerates high temperatures, fears cold, prefers moisture, and dislikes dryness. It grows in sparse forests in valleys or on flat land.

For cultivation, use loose, fertile, well-drained loam and sandy loam rich in organic matter. It is mostly distributed in sparse forests in valleys and on flat land at altitudes of 300 m to 850 m (Guangxi, Hainan) and 1,100 m to 1,700 m (south of central Yunnan).

Propagation methods of Radermachera sinica

1. Seed propagation: At the end of December each year, when the capsules of Radermachera sinica are close to splitting and the seeds are fully mature, harvest the long strip-shaped capsules, dry them in the shade, and store them dry. Between March and April of the following year, soak the dried seeds for 3 to 4 hours first, remove them, spread them out briefly to air-dry, mix them with sandy soil, and scatter them on the seedbed. Lightly cover with a thin layer of soil, cover with plastic film to retain moisture, and remove the film after the seeds sprout, but shading is still needed. When 4 to 5 large leaves have grown, they can be transplanted into pots.

2. Cutting propagation: Between March and April, cut 1- to 2-year-old woody branches 15 to 20 cm long, remove all leaves, and insert them into a sandy loam seedbed. The cutting should be inserted to a depth of about 8 cm of the cutting length. At the same time, spray water to keep the seedbed moist. After a complete root system has grown, it can be transplanted into a pot with the soil ball.

3. Layering propagation: In March to April, perform ring-barking below the node of a strong 2-year-old branch, with a width 2 to 3 times the diameter of the stem being layered. Use clean, moist peat soil or sandy loam to knead form a soil ball 8 to 10 cm in diameter at the ring-barked area. Then wrap the soil ball with a 15 cm × 20 cm piece of plastic film, mainly leaving an opening at the upper end for water collection, and tie it against the thick main trunk. By late autumn, a relatively complete root system will grow at the ring-barked opening. At this time, it can be cut away from the mother plant and planted separately in a pot.

Cultivation methods of Radermachera sinica

1. Temperature control

Radermachera sinica likes a warm and humid environment, and temperature is the most important factor. The daytime temperature should be controlled between 19°C-21°C, and the nighttime temperature should be controlled between 18°C-20°C. This is the most suitable growth temperature. Too high or too low will affect its growth.

In the hot midsummer, try to keep the temperature below 27°C. When the ambient temperature is very high, appropriately build a shed for shade. Increase ambient humidity, thereby increasing leaf surface humidity. In winter, the temperature must not be lower than 8°C, and the humidity must not be less than 5°C, otherwise it will be frostbitten below this temperature.

2. Humidity control

Radermachera sinica prefers moisture in both soil environment and indoor environment. Indoor humidity should be controlled between 70-80%. In large banquet halls where humidity cannot be controlled, we spray the leaf surfaces once in the morning and once in the evening. If the humidity is too low or it is in a dry environment for a long time, the leaves will curl and turn yellow, affecting ornamental value.

3. Light control

Radermachera sinica is a plant that likes sunlight and also tolerates shade. Light is very important. Radermachera sinica likes to grow in semi-shaded environments. In the north, under normal circumstances we keep it indoors, so there is no problem of direct sunlight.

Radermachera sinica fears being placed in dark places for a long time, where it cannot receive direct or scattered light. After a long time, it will definitely drop leaves. Therefore, in winter it should be placed on a balcony or in front of a sunny window to receive sufficient light.

4. Watering method

In summer, potted Radermachera sinica should be watered once every 3 to 4 days, but this also depends on the individual situation. In winter, indoors in the north, Radermachera sinica almost stops growing, and watering should be controlled so that the potting soil is just not dry. If you water, water thoroughly; if you do not water, do not pour even a drop of water into the pot. This is the principle, please remember it.

5. Pruning techniques

The purpose of growing Radermachera sinica is for ornament and to complement the indoor environment. If the tree shape does not look good, it will not be attractive, so it should be pruned carefully, generally into a mushroom shape or a rounded mound shape. Cut off some old leaves and yellow leaves.

6. Soil management

When Radermachera sinica is growing, soil is equally important. Choose loose, breathable, well-drained, and nutrient-rich soil. Usually use garden soil : leaf mold : decomposed organic fertilizer : river sand = 5:3:1:1 ratio to prepare it. Persist in loosening the soil once a month during the growing season to ensure the root area is always in a well-aerated state.

If water accumulation is found in the pot, remove it as soon as possible, and after the potting soil dries out, repot and change the soil to maintain better growth of Radermachera sinica.

7. Fertilization method

During the growing period, fertilize Radermachera sinica diligently to ensure vigorous growth. Use compound fertilizer or nitrogen-phosphorus-potassium 20:10:10 or farmyard manure, etc. Fertilization can be stopped in winter.

Alright, the editor has introduced the propagation methods and cultivation methods of Radermachera sinica here. Next, let us look at the pest and disease control and cultivation precautions for Radermachera sinica.

Pest control of Radermachera sinica

1. Leaf spot disease

[Damage characteristics] In environments with high temperature, high humidity, and poor ventilation, its leaves are susceptible to leaf spot disease.

[Control method] Strengthen ventilation and light transmission, and avoid water remaining on leaf surfaces for a long time. When a small number of diseased leaves are found, remove and burn them in time, and regularly spray 50% carbendazim wettable powder 600 times solution, once every half month, for 3-4 consecutive times. For home pot cultivation, for disease spots appearing on a small number of leaves of individual plants, clotrimazole cream can be applied.

2. Scale insects

[Damage characteristics] Under conditions of high temperature, high humidity, and poor ventilation, especially when kept in a greenhouse for a long time in autumn and winter, scale insects are likely to appear on the stems and leaves of Radermachera sinica.

[Control method] Strengthen ventilation and light transmission, and pay attention to controlling environmental humidity. When a small number of live insects are found, wipe them off promptly with a damp cloth, or use transparent tape to stick them off. In production cultivation, during the peak hatching period of nymphs, spray with 25% buprofezin wettable powder 1500 times solution. Other agents such as Guoguang Jie Bisi and methidathion also have good effects.

3. Mites

[Damage characteristics] The main symptoms of damage are new leaves wrinkling and curling, and the leaf surface being uneven. It generally occurs from June to September. High temperature and dryness are conducive to large outbreaks of this pest, while under relatively humid conditions the pest occurs less.

[Control method] Mainly use acaricides such as Miejing, Damanling, and Hexythiazox.

4. Aphids

[Damage characteristics] One of the most common aphids is the green peach aphid. Symptoms include wrinkled and deformed leaves, usually with shiny honeydew spots. Aphids can be seen with the naked eye.

[Control method] Spray with phorate, omethoate, deltamethrin, etc.

Precautions for growing Radermachera sinica

1. When the temperature is above 30°C, provide appropriate shade and spray water, or spend the summer in a cool place. In winter, place it on a south-facing balcony with sufficient light. Cold damage occurs when the minimum temperature is below 5°C, causing a large number of fallen leaves. Seedlings tolerate shade, so provide shade in summer.

2. Radermachera sinica likes relatively moist soil and growing environment. Air humidity should generally remain between 70%-80%, and should not exceed 85% at most. If placed at home, mist the plant regularly with slightly warm clean water to maintain its fresh appearance and also increase environmental humidity.

3. Radermachera sinica likes warmth. In hot seasons, it is best to place the plant in a ventilated place with sufficient scattered light, and avoid direct strong light to prevent leaf burn. In winter, it should be placed in a warm room. The overwintering temperature is best maintained above 10°C. If the temperature remains below 5°C for a long time, cold damage may occur, causing leaf drop, and in severe cases plant death.

4. Radermachera sinica likes light and is also fairly shade-tolerant. Seedlings tolerate shade and are even more tolerant. When maintaining in pots, place it in a place with sufficient scattered light, so that excessive shade does not make the leaves dull, yellow, and fall off.

5. Radermachera sinica likes moisture. During the growing period, keep the soil moist, but when new shoots are sprouting, appropriately control water to prevent leggy growth of new shoots. In spring, water once every 2-3 days; in the high-temperature seasons of summer and autumn, water once every 1-2 days; in winter, control water and water once every 7-10 days. Watering should be determined according to weather, season, and other conditions. In dry and hot seasons, spray the plant daily to retain moisture to prevent excessive leaf dehydration and yellowing.

Reasons for yellowing leaves of Radermachera sinica

1. It is possible that the Radermachera sinica has no roots, and may have been newly sawed off and placed in a pot (flowers bought from itinerant vendors are prone to this situation).

2. Because of sudden environmental changes, temperature, humidity, and light differ greatly from the maintenance environment in the greenhouse, or repotting damaged the roots and it needs to recover, resulting in yellowing leaves.

3. A large number of fallen leaves of Radermachera sinica may be related to watering, because if the plant is in overly dry soil, the root system will be damaged to a certain extent. At this time, pouring in a large amount of water will suffocate the originally damaged root system, obstruct respiration, further damage the root system, affect absorption, and cause a large number of fallen leaves.

4. Caused by poor ventilation and air permeability, with withered and yellow leaf tips, caused by dry indoor air.

5. It may be caused by the plant being in too dark an environment with insufficient light.

6. Whether the amount of fertilizer applied is too large, whether the organic fertilizer used is fully decomposed, and so on.

How to grow Radermachera sinica_ cultivation methods and precautions for Radermachera sinica

Content summary: Radermachera sinica is a type of small tree and is relatively suitable for indoor pot cultivation. Its maximum growth height can reach 10 m. Radermachera sinica is also known by other names such as mountain bean tree, bean pod wood, and Dazhaoyang. It is mostly distributed in tropical regions such as Guangdong and Taiwan, China. It likes sunlight and tolerates high temperatures, but must not be dry, and needs frequent watering. Suitable soils are sandy soil and organic soil. Wild Radermachera sinica mostly grows in valleys at altitudes above 300 m, and it has extremely high medicinal value. This article explains the planting methods and cultivation precautions for Radermachera sinica.

[Morphological characteristics of Radermachera sinica]

Radermachera sinica is a small tree with a height that can reach more than 10 m. Its leaves are divided into petioles and leaf rachises, and their shape is ovate. The leaf rachis can reach more than 30 cm in length. The small leaves are lanceolate, with a length of more than 4 cm and a width of more than 2 cm. The leaf tail of Radermachera sinica is relatively pointed, and the surface is green, smooth and attractive, without impurities. The calyx of Radermachera sinica is white and contains white milky sap, and the style is exposed, about 12 mm long. The corolla is campanulate and funnel-shaped, and the corolla color is white. Radermachera sinica fruits in October each year and matures in December.

[Planting method of Radermachera sinica: sowing]

First, in December, harvest the mature Radermachera sinica fruits. At this time, the fruits are in a split state, indicating that they are in the mature stage. After harvesting, dry them in the sun, take out and store the seeds released from the fruits, remove the surface membrane, and store them dry. When sowing in early spring, soak them in clean water beforehand for about two hours, then place them in a plastic bottle in a shed room. Before long, the Radermachera sinica seeds will germinate. After that, cover the surface with a thin layer of soil and add plastic film. The seedlings will automatically break through the film and grow.

[Planting method of Radermachera sinica: cuttings]

The best time for cuttings is March each year. At this time, when the temperature reaches about 15°C, take out the branches prepared last year, about 15 cm long, remove all leaves from the branches, and the best position for the lower cut is about 0.5 cm below the branch node. Then insert them into sandy soil, with the best depth being one third of the cutting length. After that, spray water to moisten the seedbed, and after about half a month they can survive and take shape.

[Planting method of Radermachera sinica: propagation]

In early spring, from a Radermachera sinica at least about two years old, cut off a growing branch or stem, mainly using ring-barking, then tie a piece of plastic film about 15 cm around the wrapped surface, and then tie it to the main trunk of the tree, which can effectively prevent the branch from breaking due to wind. In autumn, the roots will be fully grown. At this time, cut it away from the main trunk and plant it in a pot.

[Precautions for growing Radermachera sinica: temperature]

The planting temperature management for Radermachera sinica should be 20°C-30°C. However, once the direct temperature for Radermachera sinica exceeds 30°C, it needs to be shaded with a shade shed, or it can be watered directly and moved to a cool place. When the temperature drops to 10°C, it should also be moved indoors for management. If the temperature is below 5°C, the leaves will be directly damaged. The best growing environment is indoors. Radermachera sinica is a light-loving plant, so it can mainly receive full sun. Seedlings are more shade-tolerant. For household potted plants, it can be placed on a balcony for better lighting.

[Precautions for growing Radermachera sinica: watering and fertilizing]

Potted Radermachera sinica should be kept in a relatively moist soil environment. It generally sprouts in spring. At this time, water appropriately, only needing to keep the soil moist. For indoor potted Radermachera sinica, in hot weather, spray water 2-3 times. In winter, when the temperature is lower, Radermachera sinica enters dormancy, and watering can be spaced 2-3 days apart. When planting Radermachera sinica, an appropriate amount of multi-element compound fertilizer can be added, and fertilizer should be added appropriately during this period, once a month, and cake fertilizer water can be chosen. For indoor potted Radermachera sinica, urea can be applied, and in autumn and winter, potassium dihydrogen phosphate solution can be applied as a top dressing, which can help Radermachera sinica improve cold resistance.

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How to grow Radermachera sinica, cultivation methods and precautions for Radermachera sinica

Radermachera sinica is a very good ornamental plant. It can be seen in the living rooms of many families, but do you know how to grow Radermachera sinica? What are the cultivation methods and precautions for Radermachera sinica? So today the editor will introduce the cultivation methods and precautions for Radermachera sinica, so that everyone can understand how to grow Radermachera sinica.

Cultivation methods of Radermachera sinica:

First, soil selection. When growing Radermachera sinica, we should choose loose, fertile, well-drained and breathable culture soil rich in organic matter. This kind of soil can promote better growth of Radermachera sinica. Generally, we mix 5 parts garden soil, 3 parts leaf mold, 1 part decomposed organic fertilizer, and 1 part river sand.

Second, light and temperature. Radermachera sinica likes a relatively warm environment. The optimal growth temperature is 20 to 30 degrees. If it exceeds or falls below this temperature, it must be controlled, otherwise the plant will stop growing or even die. In addition, Radermachera sinica is a light-loving plant and can tolerate shade slightly. It can grow in full sun or semi-shade. If it does not receive light for a long time, it is prone to leaf drop.

Third, water and fertilizer management. Radermachera sinica grows very quickly in a relatively humid environment, especially during the seedling stage. If you want to limit the growth of potted Radermachera sinica, you can control the watering intensity and just keep it generally moist. Fertilization of Radermachera sinica needs to take the season into account. Generally, during growth, adding an appropriate amount of decomposed cake fertilizer and 3% multi-element compound fertilizer to the culture soil is enough. If you want it to grow better, you can apply top dressing appropriately.

Precautions when growing Radermachera sinica:

The main cultivation techniques of Radermachera sinica are sowing, cuttings, and layering; while cultivation conditions are related to light, temperature, soil, water, and fertilizer. The most important thing is that in winter the greenhouse temperature should be kept no lower than 8 degrees, otherwise cold damage is likely to occur, and even the whole plant may die. In addition, Radermachera sinica also requires attention regarding the time to obtain seeds. At the end of December, when its capsules are close to splitting and the seeds are fully mature, harvest the long strip-shaped capsules, dry them in the shade, release the winged seeds, rub them and winnow away the membranous seed wing fragments, and store them dry until sowing in the following spring.

The above are the cultivation methods and precautions for Radermachera sinica. Now everyone knows how to grow Radermachera sinica! In addition, the editor also wants to tell everyone that Radermachera sinica is not only for ornament. For example, Radermachera sinica itself also has the effects of clearing heat and detoxifying, and dispersing blood stasis and reducing swelling. For external use, it can treat bruises and fractures, venomous snake bites, and carbuncles and swellings. For internal use, it can be used for summerheat with fever.

Extended reading:

How to fertilize Radermachera sinica, what fertilizer to apply? Pest and disease control, flower language, how to grow it, cultivation methods and precautions