How to Add Zinc to House Plants


Keep your houseplants thriving with careful attention to their fertilization needs. If your houseplant foliage becomes yellow, this indicates a zinc deficiency. Most fertilizers contain some zinc as a trace element; however, zinc is not a main ingredient in these fertilizers. If your houseplants exhibit a zinc deficiency, continue to use an all-purpose fertilizer and supplement these feedings with zinc sulphate. Monitor the condition of your plants and you should see marked improvement after supplementing with zinc.

Step 1

Mix the all-purpose fertilizer with water, using half the recommended amount to make a half-strength fertilizer solution.

Step 2

Move the houseplant to a sink or a tub for drainage.

Step 3

Pour the mixed fertilizer around the roots of the houseplant until the fertilizer drains out the bottom of the container.

Step 4

Measure the zinc sulphate according to package recommendations for the size of your growing container.

Step 5

Sprinkle the zinc sulphate around the soil of the houseplant, taking care not to allow the fertilizer granules to touch the plant foliage.

Step 6

Water the houseplant generously immediately after applying the zinc sulphate.

Things You'll Need

  • All-purpose houseplant fertilizer (water-soluble)
  • Zinc sulphate (granular)


  • Zinchem: The Importance of Zinc in Plant Nutrition
  • Extremely Green: Organic Fertilizer and Soil Amendment Guide
Keywords: fertilization needs, houseplant foliage, zinc deficiency

About this Author

Kathryn Hatter is a 42-year-old veteran homeschool educator and regular contributor to Natural News. She is an accomplished gardener, seamstress, quilter, painter, cook, decorator, digital graphics creator and she enjoys technical and computer gadgets. She began writing for Internet publications in 2007. She is interested in natural health and hopes to continue her formal education in the health field (nursing) when family commitments will allow.