The Q&A Archives: Adding nutrients

Question: After having the soil tested in my garden, I was told the potassium level was low. What can I add to increase the level?

Answer: This nutrient, sometimes called potash, is essential for vigorous growth, disease resistance, fruit and vegetable flavor and development, and general plant function. Potassium breaks down slowly so you won't have to add it often. Certain animal manures (cow and horse) and mineral fertilizers, such as greensand, add potassium to the soil.

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