When talking about soil and fertilizers, what are the primary nutrients in addition to NPK (Nitrogen, Phosphorus, Potassium) that play a major role in plant development?
I have several african violets in special clay pots. The pots kind of resemble a double boiler, and the lower pot is filled with water, then the upper section, containing the plant, is unglazed on its ...
How often should I fertilize my lawn? Should I follow a certain schedule? I have heard of people fertilizing on around holidays [US: Easter (sometime in April), Memorial day (last week of May), fourth ...