How to Grow a Potted Radermachera sinica? A Detailed Guide to the Latest Care Methods

The happiness tree is also known as the pepper tree, the mountain bean tree, the bean tree, and so on. It is a small tree of the genus Radermachera in the family Bignoniaceae, often grown as a small to medium-sized potted plant that can be placed on balconies, in bedrooms, entrance halls, and other spots. Its leaves are dense and verdant, full of vitality and vigor, and it can serve as an ornamental plant that brings good fortune, carrying with it the wish of bringing happiness to people. Now let us take a look together at how to grow a potted happiness tree!

The Growth Habits of the Happiness Tree

The happiness tree is native to Taiwan, China, Guangdong, Hainan, Guangxi, Guizhou, Yunnan, and other places, and is also distributed in India, the Philippines, Bhutan, and other countries. It likes high temperatures, high humidity, and plenty of sunlight. It tolerates high temperatures, fears cold, prefers moisture, and dislikes dryness. It grows in valleys or open forests on flat ground. For cultivation, use loose, fertile, well-drained loam and sandy loam rich in organic matter.

Propagation Methods for the Happiness Tree

1. Sowing: At the end of December, when the capsules of the happiness tree are close to splitting and the seeds are fully mature, harvest the long strip-shaped capsules. After drying them, shake out the winged seeds. After rubbing them, winnow away the fragments of the membranous seed wings, then store them dry until sowing the following spring. Usually, from March to April, first soak them for 3 to 4 hours, then remove them and spread them out to dry slightly. After mixing them with sandy soil, broadcast sow them on a prepared seedbed, lightly cover with a thin layer of soil, and cover with plastic film to retain moisture. After the seeds sprout, remove the film and set up a light-shade shed for shading.

2. Cuttings: From March to April, when the ambient temperature reaches about 15°C, cut 1- to 2-year-old woody branches about 15 cm to 20 cm long, remove all the leaves, and make the lower cut preferably 0.5 cm below a node. Insert them into a sandy loam seedbed, with the cutting inserted to a depth of about 1/3 to 1/2 of the cutting length. During the period when the lower cut is healing and rooting, spray water to keep the seedbed moist. Only after a well-developed root system has grown can they be transplanted into pots with a soil ball.

3. Layering: From March to April, perform ring barking below a node on a 2-year-old vigorous branch or stem of the happiness tree. The width of the bark removal is generally 2 to 3 times the diameter of the layered stem. Below the ring-barked wound, tie a piece of plastic film measuring 15×20 cm and tie it against a thick main trunk to prevent it from drooping and being broken by the wind. By late autumn, after the ring-barked wound has grown a fairly well-developed root system, cut it away from the mother plant and plant it separately in a pot.

How to Grow a Potted Happiness Tree?

1. Soil: When the happiness tree is growing, soil is equally important. Choose a loose, breathable, well-drained, and nutritious soil. Usually prepare it with garden soil : leaf mold : decomposed organic fertilizer : river sand = 5:3:1:1. Persist in loosening the soil once a month during the growing season to ensure the roots remain in a well-aerated state at all times. If water accumulates in the pot, drain it as soon as possible, and after the potting soil dries out, repot and replace the soil.

2. Temperature: The happiness tree likes a warm and humid environment, and temperature is the most important factor. Keep the daytime temperature between 19 and 21°C, and the nighttime temperature between 18 and 20°C. In the hot midsummer, try to keep the temperature below 27°C. When the ambient temperature is very high, provide shade appropriately with a shed. In winter, the temperature must not be lower than 8 degrees, and the humidity must not be less than 5 degrees, otherwise it will be frostbitten below this temperature.

3. Humidity: The happiness tree prefers moisture in both its soil environment and indoor environment. Keep indoor humidity between 70 and 80%. In large banquet halls where humidity cannot be controlled, spray the leaf surfaces once in the morning and once in the evening. If the humidity is too low or it remains in a dry environment for a long time, the leaves will curl and turn yellow, affecting its ornamental value.

4. Light: Light is very important for the happiness tree. It likes to grow in a semi-shaded environment. In the north, it is generally kept indoors, so there is no problem of direct sunlight. What it does fear is being placed in a dark place for a long time, where it receives neither direct light nor scattered light; after a long time, it will certainly drop its leaves. Therefore, in winter it should be placed on a balcony or in front of a sunny window to get sufficient light.

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

6. Pruning: The purpose of growing a happiness tree 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, you can prune it following its natural direction of growth, or prune it into a mushroom shape or a rounded mound shape, while also cutting away some old leaves and yellow leaves.

7. Fertilizing: In addition to requiring an appropriate amount of decomposed cake fertilizer and 3% multi-element compound fertilizer in the potting mix, a potted happiness tree should also be given continuous topdressing. During the growing season, apply a quick-acting liquid fertilizer once a month, usually decomposed cake fertilizer water. For a small number of household potted plants or large potted specimens displayed in public places for a long time, a small amount of multi-element slow-release compound fertilizer granules can be buried periodically, or a mixed solution of 0.2% urea plus 0.1% potassium dihydrogen phosphate can be used for watering.

8. Pests and Diseases: Pests on the happiness tree generally include scale insects, mites, and aphids. Use Jiebisidi, methidathion, Manjing, fenbutatin oxide, zinc phosmet, omethoate, and Decis to control the insects. As long as you ventilate frequently, pests generally will not occur. The happiness tree is still quite strong in disease resistance and usually rarely suffers from diseases.

What to Do If the Happiness Tree's Leaves Turn Yellow?

1. Metabolism: The happiness tree is constantly carrying out metabolism as it grows, so there will be the phenomenon of old leaves dying and turning yellow. Just cut off the yellow leaves directly; no special care is needed.

2. Caused by having no roots: If the happiness tree was just bought, it may be because the happiness tree has no roots. You can handle it according to the actual situation, either return it or let it rest quietly until it sprouts new roots.

3. Sudden environmental changes: If the temperature, humidity, and light change too suddenly, or if repotting damaged the roots and it needs to recover, causing the leaves to turn yellow, you can take measures to reduce the degree of environmental change and wait for the happiness tree to adapt.

4. Improper watering: If too much water is given, root respiration is blocked or the roots even rot, affecting absorption and causing a large number of yellow leaves. At this time, pay attention to watering. Do not wait until the soil is completely dry before watering. Water thoroughly when you water, and do not keep the frequency fixed for a long time.

5. Dry air: If it is caused by dryness due to poor indoor ventilation, the leaf tips will appear scorched and yellow. At this time, you can increase indoor ventilation and also spray water appropriately to increase indoor humidity.

6. Insufficient light: If it is caused by the plant being in too dark an environment with insufficient light. At this time, you can give the happiness tree plenty of sunlight, but avoid exposure to strong sun.

7. Too much fertilizer: Check whether the amount of fertilizer applied was too large, whether the organic fertilizer used was fully decomposed, and so on. At this time, you can flush the potting soil with water to dilute the fertilizer strength, but be careful not to cause water accumulation.