What are the potash fertilizers used for flowers?

Potash fertilizers used in flowers are potassium chloride, potassium sulfate, potassium dihydrogen phosphate, potassium stone salt, potassium magnesium salt and so on. Among them, potassium chloride is a kind of quick-acting fertilizer which is soluble in water. Potassium dihydrogen sulfate is often sprayed as foliar fertilizer, which can effectively supplement phosphorus and potassium and promote flowering.