What types of potassium fertilizers are commonly used for growing flowers?

The amount of potassium fertilizer used should not be too large; too much will affect the availability of calcium, magnesium and other elements in the soil, causing the soil to become compacted, which is unfavorable for plant growth. Commonly used potassium fertilizers include: (1) Plant ash; wood ash works better than grass ash, is a quick-acting fertilizer, and contains various trace elements needed by plants. (2) Potassium sulfate: contains 48~52% potassium; when used as a top dressing, mix it with organic fertilizer, and it is mainly used as a base fertilizer. (3) Potassium chloride: contains 52.4% potassium; use it as a base fertilizer or in combination with other fertilizers.