Sources of Potassium (Organic)

Banana peels

Wood ash (❗️do not use wood ash for potassium unless you also need to adjust the soil pH.)

Muriate of potash (potassium chloride)

Sulfate of potash (potassium sulfate)

Sul-Po Mag (langbeinite)

Manure Greensand

Kelp Meal/Seaweed

Alfalfa Meal