Oil cake left after plant seeds are pressed; There are: rapeseed cake, sesame cake, peanut cake and so on. Fermented and decomposed into cake fertilizer; Peanut cake fertilizer contains a large number of nutrients needed for plant growth, including trace elements. After this "cake fertilizer" is sealed with rice washing water, the fat water made by fermentation is called cake fertilizer. "cake fertilizer water" is a very good organic fertilizer, which needs to be diluted to a certain proportion by adding water. Some residues that are not completely decomposed can be used as the base fertilizer of flowers by landfill, and the effect is also remarkable. Succulents are mainly composed of NPK, phosphorus and potassium fertilizer, supplemented by other elements. It is best to use it in liquid form for quick action. Peanut cake contains more nitrogen, so it can be used as appropriate in vegetative growth period, and phosphorus and potassium fertilizer should be supplemented in bud stage before flowering. It is not common for succulents to lack fertilizer, but it is more common to burn roots with more fertilizer. Because succulents don't eat fat very much, trace elements in the soil are enough to deal with it. Fertilization must be thin.