Because the root system of Corydalis Africana is shallow and weak, it is not suitable for application of concentrated or organic fertilizer. It should adhere to the principle of applying thin fertilizer frequently. Urea, ammonium nitrate and potassium dihydrogen phosphate are suitable for fertilization. They can be used alone or in combination with microelements. The concentration of spraying to the leaves is not more than 0.1%, and the concentration of the substrate is not more than 0.4%.
The principle of fertilization is to apply the fertilizer with high nitrogen content at the seedling stage of Corydalis Africana. As it grows up, the fertilizer with balanced nitrogen, phosphorus and potassium should be applied. It should be noted that the smaller the seedling, the lighter the fertilizer. In the leaf cutting stage of Corydalis Africana, vitamin B solution can be used to promote the rooting and germination of plants. Remember not to apply fertilizer within one month after transplanting seedlings, otherwise it will easily lead to rotten seedlings, and then use fertilizer with high nitrogen content to promote leaf growth and luster. The fertilizer applied after the seedling grows up should pay attention to the balanced proportion of nitrogen, phosphorus and potassium to promote the growth of the plant. In order to promote the differentiation of flower bud, the fertilizer with high phosphorus content should be used when the plant matures and enters the flowering stage. In general, the liquid fertilizer should be applied once every 10-20 days, and the fertilizer with high phosphorus content should be applied before flowering. When entering the flowering stage, phosphorus and potassium fertilizer are needed. Do not apply too much nitrogen fertilizer, or the leaves will be lush but not bloom. Sprinkling pot can be used to spray leaves or to pour pots, which is more conducive to promoting absorption.
