How to Enrich Soil for Indoor Plants With Egg Shells

Wash egg shells in boiling water for three or four minutes to kill bacteria. This step is not important when composting egg shells, but since you will be using these shells for indoor plants, the extra step helps eliminate any future problems to you or the plant that may be caused by bacteria.

Dry the shells thoroughly. You can leave them on a counter to dry, or place them in a gas oven where the heat from the pilot light accelerates drying.

Grind the cleaned, dried shells using a mortar and pestle, or simply crush them in your hands. You will not need to pulverize the shells at this point, just break them up into manageable chunks.

Drop the broken shells into a blender or food processor to grind them into a fine powder.

Scratch the surface of the plant’s soil and add about a teaspoonful of egg shell powder. Rake the soil lightly to work the powder into the dirt. You will not need to work it much since regular watering and shell break down over time will work together to release the calcium inside.