The Q&A Archives: fertilizer

Question: What does house plant fertilizer have in it that normal fertilizer do not?

Answer: In addition to nitrogen, phosphorus and potassium (the 3 numbers on a fertilizer package), houseplant formulations also include sulphur, magnesium, calcium, iron, manganese, boron, zinc, copper, molybdenum, chlorine, nickel, sodium, cobalt and silicon. These are also essential for healthy plant growth and development and are included in houseplant fertilizers because potting soil is used as a growing medium and it is devoid of these elements.

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