How to Grow Radermachera - Planting & Caring

By Sharon & Team   /   Shrubs Category   /   2023

Radermachera, also known as China Doll or Emerald Palm, is an evergreen shrub that can grow up to 6 feet tall. It has dark green, glossy leaves and clusters of white or pale pink flowers. Radermachera is native to China and Taiwan and is often used as an ornamental plant in these countries.

How to Grow Radermachera - Planting & Caring

Growing Easiness

Is it easy to grow Radermachera plant? Common ly known as the China Doll or Radiant Cradleflower, this plant is easy to grow with small difficulties. It is a beautiful houseplant that can reach up to 6 feet in height. The Radermachera prefers bright, indirect light but can also tolerate low light conditions. It is important to keep the soil moist but not wet and to fertilize the plant every two weeks during the growing season. Although the Radermachera is a relatively low-maintenance plant, it is important to watch for pests such as aphids and mealybugs.

Plant Size

How big can it be? Because it can reach a height of 1.5 m, it is often better to form it into a compact shrub that is only 60-70 cm tall. This allows for easy maintenance and shaping of the plant, as well as preventing it from becoming too leggy or top-heavy.

Growth Rate

How fast is the growth? The Radermachera plant is a fast grower, gaining 15 to 30 centimeters in height every year. This makes it a popular choice for gardeners who want a plant that will fill in a space quickly. Radermachera is also known for being drought tolerant and able to thrive in a range of different climates, making it a versatile option for gardeners in many different parts of the world.

Radermachera Basic Knowledge

Plant Form Shrub
Family Bignoniaceae
Origin China

Lifespan, Perennial or Annuals

How long is the lifespan? Although Radermachera plants are not the longest-lived houseplants, they can still thrive for several years with the proper care. These evergreen shrubs can grow to be six to eight feet tall and wide, making them a substantial addition to any indoor space. When given the right amount of light, water, and fertilizer, Radermachera plants can bloom indoors year-round.

Ideal Temperature

What is the ideal temperature? The reason for the increased growth rate at an elevated temperature is not fully understood. It is known that the growth of many plants is more intensive at an elevated temperature. The Radermachera plant is no exception. It is possible that the increased growth rate is due to the fact that at an elevated temperature the metabolic processes in the plant are accelerated.


What about the humidity? Sometimes, when the air is too dry, the leaves of the Radermachera plant will become dry and brittle. To maintain optimal humidity levels for your Radermachera, aim for a relative humidity of 60% or higher. You can increase humidity around your Radermachera by grouping it with other plants, running a humidifier, or placing the plant on a pebble tray. To create a pebble tray, simply fill a shallow dish with gravel and add water until it just reaches the top of the gravel. Be sure to empty the dish and refill it with fresh water as needed to prevent the growth of mold or bacteria.

Light Requirement

What amount of light this plant needed? Since it is a plant that originates in tropical and subtropical Asia, it should not be surprising that it needs a lot of light to grow well. Bright diffused light is best, but the plant will also do well under fluorescent lights. It is important to note, however, that the plant will quickly lose its lower leaves if there is a lack of light, so make sure to give it plenty of light, especially in the winter.

Soil Composition

What is good soil for Radermachera? Unless you want to grow your Radermachera in a container, soil is an important consideration. This plant requires a rich light humus soil with the addition of peat and sand. For a soil of your own preparation, take 1 part garden earth, 1 part coarse sand or perlite, and 1/2 parts peat or humus. Ground coal pieces can also be added. Good drainage is required, so consider a bottom layer of bricks with a top layer of sand.

Watering Time

How much I must water Radermachera? The Radermachera plant is native to subtropical and tropical Asia. It grows in moist, well-drained soils in partial to full sun. It prefers moderate to high humidity and does not tolerate drought conditions. The plant is drought-tolerant once established. It should be watered regularly during the growing season and sparingly in winter.

Fertilizing and Nutritient

About fertilizer. The reason to use organic fertilizer is because it is good for the plant. It helps the plant to grow. Also, using organic fertilizer helps the plant to get the nutrients it needs. And, using organic fertilizer is good for the environment.


How to reproduce Radermachera? Eventually, every gardener faces the need to propagate the plant. The most common methods are layering, cuttings and seeds. You can propagate Radermachera sinica in all these ways. The apical cuttings at a soil temperature of 77 ° F. Cuttings (6-8 cm long) are rooted in a mixture of peat and sand. The lower pair of leaves are removed, and the cut is processed with a rootstock. For rooting, cover the stalk with a film. Rooted cuttings for 2-4 pcs. planted in one pot. You can propagate seeds that are planted in separate pots to a depth of 1.5 cm, germinate at a temperature of not less than 35,61 ° F. After the shoot, the pots are transferred to a bright place. A month later, a complex fertilizer is introduced, and after the seedlings grow up, they are transplanted into larger pots. The plant is multiplied by layers. For this, shoot up to half slanting is cut in a few centimeters from the bottom of a pair of leaves, a chip is inserted into the incision so that it does not overgrow, treat it with a rootstock and overlay the incision site with moss or a mixture of moist peat with sand. Tie with polyethylene or foil. After 3-4 weeks, when the roots appear, the top of the rooted shoot is cut and planted.


Why Radermachera won't bloom? When the Radermachera plant is blooming, the flowers are yellow and fragrant. The flowers are bell-shaped, and they bloom in clusters. The plant does not bloom in the room.

Transfer or Repotting

How much I must water Radermachera? If the plant is old, it should be transferred every two to three years. Three-year-old and younger plants should be transferred every year in the spring. The pot size should be 2-3 cm larger than the previous pot. The roots should be cut or placed spirally in the pot. This plant grows quite rapidly.

Caring The Radermachera

How to care the plant? If you want your Radermachera to bush out and look its best, you'll need to prune it regularly. In the summer, you can take it out of the pot and put it in a shady spot in the street.

Pests & Challenges

What is the challenge when caring Radermachera plant? Although it unpretentious, but it is very capricious. It is very susceptible to spider mites, aphids, chervets and whiteflies. If the leaves of the plant begin to grow smaller and paler, and the shoots are too stretched, then most likely the reason is the lack of light. Young leaves can be small due to lack of nutrients. Often, the leaves begin to dry out at the edges and tips, and on the leaf blade there are dry tissue sites. All these problems arise from too dry air or from the fact that the plant is in the sun. Over time, the lower leaves of the plant turn yellow and begin to fall off due to the natural aging process.

Toxic & Poisonous Type

Are Radermachera poisonous? Because all parts of the Radermachera plant are poisonous, it is important to take care when handling this plant. If ingested, the plant can cause nausea, vomiting, and diarrhea. If the plant comes into contact with the skin, it can cause irritation.