Propagation and cultivation techniques of "Phoenix Tree" Carthamus tinctorius!

Red flower jacaranda is known as one of the most colorful trees in the world because of its bright red or orange flowers and bright green pinnate compound leaves. It is planted in botanical gardens and parks in southern cities of China as an ornamental tree or street tree. Here is an introduction to the propagation and cultivation techniques of "Phoenix Tree" red flower jacaranda!

1. Growth habits of red flower jacaranda

aria is a tropical tree species. It begins to bloom after 6~8 years of planting. It likes high temperature, humidity and sufficient sunshine environment. It grows at 20~30℃ and is not cold resistant. The winter temperature is not lower than 10℃. It is suitable for deep fertile sandy loam rich in organic matter. It is afraid of ponding. It must have good drainage. It is more resistant to drought and barren soil. Generally, it can reach 1.5~2 meters in one year and 3~4 meters in two years. It begins to bloom after 6~8 years of planting. In South China, The winter buds germinate in early February every year, the growth peak is from April to July, the growth volume decreases due to high temperature in late July, the temperature decreases after mid-late August, the growth accelerates, the growth slows down after October, and the leaves fall from December to January of the next year.

II. Propagation techniques of Jacaranda rubra

the seeds mature in December, the pods are collected, the seeds are dried and stored, the seeds are sown in spring of the following year, the seeds are soaked in boiling water before sowing, after cooling, the seeds are soaked for 1~2 days, the water is changed for 1 ~2 times in the middle, the seeds begin to germinate 6~7 days after sowing, the seedlings can be fully grown in more than 20 days, the annual seedlings can reach about 1.5 meters, the seedlings are sensitive to frost, comprehensive fertilizers can be applied in the early stage, nitrogen fertilizer should be applied less, fertilization should be stopped after autumn to promote early lignification, In winter, if the leaves have not fallen off, they can be cut off manually, covered with film or wrapped with single plant to prevent frost, and the 1-year-old seedlings can be planted out of the nursery.

3. Cultivation techniques of red flower jacaranda

1. garden selection

The red flower jacaranda does not have high requirements for soil, and can grow well in poor soil sections. Because its roots have rhizobia, it can fix nitrogen and increase soil fertility. However, accumulated water will cause rhizobia to die and affect plant growth. It should be planted in fertile, deep, well drained and sunny places.

2. timely transplanting

The seedlings of Jacaranda sinensis should be transplanted once after 1~2 years of growth. Transplantation should be carried out in early spring. The plant spacing should be about 60cm. The 3-year-old seedlings can be used for planting. The planting place should be open and sunny. When the weather is dry, it should be watered adequately. The survival rate before transplanting in spring is high. It can also be planted in rainy season, but some branches and leaves should be cut off to ensure their survival.

3. timely pruning

The red flower jacaranda plant sprouts strongly, can take the dry method to cultivate the big seedling, after planting, loosen the soil every year, weed 2~3 times, water in time, apply topdressing once in spring and autumn, remove the root sprouts in time, so as to ensure the good growth of the tree body, the trunk will grow branches and leaves at any time, if it grows naturally, the plant shape will change greatly, so it needs to be pruned frequently.

4. pest control

The pests of Jacaranda falcata are mainly moths, which eat plant leaves as larvae and often eat up host leaves, seriously affecting the growth and viewing of trees. The strongest is in July, August and September. To control them, we should seize the harmful period of larvae clustering. Before the dew is not dry in the morning, we can use 2.5% trichlorfon powder or 1.5% parathion (1605) powder or 1.5% dimethoate powder, 1.5~2kg per mu.

The above is the introduction of propagation technology and cultivation technology of red flower jacaranda by soil flow net. Red flower jacaranda is the national tree of Madagascar Republic in Africa, the city flower of Shan Tou City in Guangdong Province, China, the city tree of Xiamen City in Fujian Province, Tainan City in Taiwan Province and Panzhihua City in Sichuan Province.