The Latest Cultivation Techniques and Methods Tutorial for Royal Poinciana

Royal Poinciana, also known as the royal poinciana tree, phoenix tree, fire tree, and red flower tree, is a deciduous tree of the Fabaceae family and the genus Delonix. Because of its bright red or orange flowers combined with bright green bipinnate compound leaves, it is praised as one of the most colorful trees in the world. It is widely planted in botanical gardens and parks in southern Chinese cities as an ornamental tree or street tree. Now let us take a look at the cultivation techniques for Royal Poinciana!

Growth Habits of Royal Poinciana

Royal Poinciana is a tropical tree species. It begins to bloom 6 to 8 years after planting. It prefers a high-temperature, humid environment with ample sunlight, with an optimum growing temperature of 20 to 30°C. It is not cold-tolerant, and the winter temperature should not fall below 10°C. Deep, fertile, sandy loam rich in organic matter is ideal. It fears waterlogging, so drainage must be good. It is relatively drought-tolerant and tolerant of poor soil. Generally, a 1-year-old plant can reach 1.5 to 2 m in height, a 2-year-old plant can reach 3 to 4 m, and it begins to flower 6 to 8 years after planting. In South China, winter buds sprout in early February each year, growth peaks from April to July, growth declines in late July due to excessively high temperatures, growth speeds up after mid-to-late August as temperatures drop, slows down after October, and leaves fall from December to January of the following year.

Propagation Techniques for Royal Poinciana

Royal Poinciana is mainly propagated by sowing. Seeds mature in December. Collect the pods, remove the seeds, and store them dry, then sow in the following spring. Before sowing, soak the seeds in boiling water, and after it cools, continue soaking for 1 to 2 days, changing to clean water 1 to 2 times during this period. Germination begins 6 to 7 days after sowing, and all seedlings can emerge in just over 20 days. One-year-old seedlings can reach about 1.5 m. Young seedlings are relatively sensitive to frost. In the early stage, a balanced fertilizer can be applied, with less nitrogen fertilizer. Fertilization should stop after autumn to encourage early lignification. In winter, if the leaves have not yet fallen, they can be removed by hand, and film mulching or individual wrapping can be used to protect against frost. One-year-old seedlings can be lifted from the nursery and planted out.

Cultivation Techniques for Royal Poinciana

1. Site selection: Royal Poinciana has low soil requirements and can grow well even on relatively poor soil. Because its roots have rhizobia, it can fix nitrogen and increase soil fertility. However, waterlogging will kill the rhizobia and affect plant growth, so it should be planted in a sunny location with fertile, deep soil and good drainage.

2. Timely transplanting: Royal Poinciana seedlings should be transplanted once after growing for 1 to 2 years, preferably in early spring. The plant and row spacing should be about 60 cm. Three-year-old seedlings can be used for planting out. The planting site should be open and sunny, and the plants should be watered thoroughly during dry weather. Transplanting before bud break in spring gives a high survival rate. Planting can also be done in the rainy season, but some branches and leaves should be pruned to ensure survival.

3. Timely pruning: Royal Poinciana has strong sprouting ability. The trunk-cutting method can be used to cultivate large seedlings. After planting out, loosen the soil and weed 2 to 3 times each year, water timely, apply a topdressing once each in spring and autumn, and promptly remove root suckers to ensure good tree growth. The trunk will constantly produce branches and leaves. If allowed to grow naturally, the plant shape will vary greatly, so frequent pruning is required.

4. Pest and disease control: The main pests of Royal Poinciana are noctuid moths, whose larvae feed on the leaves and cause damage, often stripping the host leaves completely, seriously affecting tree growth and ornamental value, with the heaviest damage in July, August, and September. Control should focus on the period when the larvae gather in groups to cause damage, dusting powder in the early morning before the dew has dried. You can dust with 2.5% trichlorfon powder, 1.5% parathion (1605) powder, or 1.5% dimethoate powder, at 1.5 to 2 kg per mu.