Just water the flowers with water soaked in soybeans, and hydroponic plants can also be used. It should be noted that

The water soaked in soybeans should be diluted after fermentation and then watered. It is best to suck a layer of clear water on the soaked water of soybeans and dilute it before watering the flowers (the precipitated water is poured on the land because it smells bad), so the smell is less.