Dahlia has a high demand for sunshine. It needs to grow in a sunny place. It needs to receive more than 6 hours of sunshine every day. Only in this way can it grow. If it is in the shade environment for a long time, the plant will grow poorly, the root system will be weak, and the flowers will be small and light. But in the hot summer, because the sun is very strong, we should avoid the strong light, and timely block the sun.
There is a certain demand for the soil during the growth, so it is necessary to ensure that the drainage is good and the soil is loose, and there is no ponding, otherwise the root will rot.
Dahlia likes cool climate and is afraid of hot climate. It grows best in the environment of 20 ℃. In North China, it grows best from late spring to late autumn.
It is not allowed to apply too much or too little water. In the growing period, water should be poured 2-3 times a day, and water control and flower conservation should be done properly before flowering.
In addition to maintaining a sufficient amount of base fertilizer, it is also necessary to apply fertilizer in a timely manner. From mid to late July to before flowering, thin liquid fertilizer should be applied every 7-10 days during this period.
