What are the methods for making homemade foliar fertilizer for orchids?

You can use soybean cake, chicken feathers, rapeseed cake, fish innards and fishy water, among others, soaked to ferment; after composting for about 3-6 months, dilute before use. In composted fertilizer, nutrients such as nitrogen, phosphorus and potassium are all fairly complete. Note that when spraying foliar fertilizer on orchids, it must be done in the evening, and it must not be sprayed at noon when the temperature is high.