Homemade orchid foliar fertilizer?

Soak liquid such as bean cake, chicken feather, rapeseed cake, fish belly and fishy water can be selected for fermentation. After retting for about 3-6 months, it can be diluted and used. Nitrogen, phosphorus, potassium and other nutrients in the retting fertilizer are relatively complete. It is necessary to pay attention to spraying foliar fertilizer on orchids in the evening, not at noon when the temperature is high.