The growth environment of Delonix regia

Delonix regia is a tropical tree species that begins to bloom after 6-8 years of planting. It prefers high temperature and humidity and a sunny environment. It grows at a suitable temperature of 20-30°C and is not cold-resistant. The temperature in winter is not less than 10°C. The sandy loam with deep fertility and rich in organic matter is suitable; it is afraid of stagnant water, must be well drained, and more resistant to drought; tolerant to barren soil. Delonix regia is generally up to 1.5 to 2 meters high in one year, and up to 3 to 4 meters high in two years. It is planted for 6 to 8 years to start flowers.

In South China, Delonix regia sprouts in early winter in February every year, and the peak of growth is from April to July. In late July, the temperature is too high and the growth rate decreases. After mid-to-late August, the temperature drops and the growth speeds up, and the growth slows down after October. , Deciduous leaves from December to January of the following year.
Seeds are commonly used for sowing seedlings. The thousand seeds of Delonix regia weigh about 400 grams. It is difficult for the seed coat to absorb water. It is necessary to scald the seed with 80℃ warm water to accelerate the germination. After natural cooling, continue to soak for 24 hours and drain for later use.
Sowing by the strip-on-demand method, Delonix regia seedlings are more sensitive to frost. Comprehensive fertilizers can be applied in the early stage, and nitrogen fertilizers should be used less. Fertilization should be stopped after the fall to promote early lignification. In winter, if the leaves have not fallen off, they can be cut off manually, and covered with a film or wrapped in a single plant to prevent frost. 1-year-old seedlings can be planted out of the nursery.