Fertilization method of Hedyotis diffusa: The growth of Hedyotis diffusa needs fertile slightly acidic soil and heavy fertilizer. It can be planted in sandy soil rich in humus, or mixed with coarse sand, rotten leaves, peat and garden soil. If the soil is poor, put decomposed fertilizer or slow-release fertilizer in the pit when planting. Topdressing every 7 ~ 10 days after planting. After flowering, 0.02% potassium dihydrogen phosphate was added to soil every month for two months before flowering 1 time, or topdressing outside roots was halved.