Homemade Eggshell Plant Fertilizer


Garden center shelves are lined with a variety of assorted plant fertilizers, both chemical and organic. One thing the myriad of fertilizers have in common is that none are inexpensive. If you're a budget-minded gardener, save used eggshells and turn them into an effective fertilizer for vegetables, plants or flowers. Eggshells are loaded with calcium carbonate, a common fertilizer ingredient. In addition, eggshells contain small amounts of nitrogen, phosphorus and other beneficial trace elements.


Step 1

Rinse eggshells carefully in warm, running water. Place the eggshells on a tray or a sheet of waxed paper and put them in a warm place to dry until they're brittle. You can also place the eggshells on a baking sheet and put them in an oven set at the lowest temperature.

Step 2

Place the eggshells in a bowl. Break the shells with your hands, then use the back of a large spoon to crush the shells into a fine powder. If you prefer, pulverize the shells in a blender or food processor.

Step 3

Sprinkle the powdered eggshells around garden plants. Work the powder lightly into the top of the soil with a trowel.


Step 1

Bring a gallon of water to boil in a soup kettle or large saucepan. Add the shells from 18 to 20 eggs.

Step 2

Remove the pan from the burner and allow the eggshells to steep in the water for eight hours. Pour the cooled eggshells and water through a strainer into a large container or gallon jar. Discard the shells or throw them on your compost pile.

Step 3

Store the liquid fertilizer in a covered container. Add a small amount of the water to your houseplants or outdoor plants every week.

Things You'll Need

  • Eggshells
  • Tray, waxed paper or baking sheet
  • Bowl
  • Large spoon
  • Blender (optional)
  • Gallon of water
  • Shells from 18 to 20 eggs
  • Soup kettle or large saucepan
  • Gallon jar or other large container
  • Strainer
  • Covered container
  • Trowel


  • OneIndia: Homemade Fertilizers
  • "Backwoods Home Magazine": You Can Make Your Own Fertilizers
  • Savannah Now: Plant Lover's Homemade Fertilizer
Keywords: eggshell plant fertilizer, calcium carbonate, organic

About this Author

M.H. Dyer is a long-time writer, editor and proofreader. She has been a contributor to the East-Oregonian Newspaper and See Jane Run magazine, and is author of a memoir, “The Tumbleweed Chronicles, a Sideways Look at Life." She holds an Master of Fine Arts from National University, San Diego.