Do crushed eggshells help plants?
Christopher Ramos
Published May 27, 2026
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Similarly one may ask, what are crushed eggshells good for?
Eggshells are rich in calcium and other minerals that help your garden thrive, which is why they make a great fertilizer! Crush a few eggshells into tiny pieces and sprinkle into each hole before planting. Eggshells can also help deter common garden pests like slugs, snails, and even stray cats!
Also, what plants benefit from coffee grounds and eggshells? Crops that attract snails such as basil, cabbage, lettuce, marigolds and strawberries will certainly benefit from a sprinkle of eggshells onto their soil. Plants that tend to like coffee grounds include hydrangeas, gardenias, azaleas, lilies, ferns, camellias and roses.
Similarly, you may ask, how do you crush eggshells for plants?
To prep the eggshells, grind with a mixer, grinder, or mortar and pestle and till them into the soil. Because it takes several months for eggshells to break down and be absorbed by a plant's roots, it is recommended that they be tilled into the soil in fall. More shells can be mixed into your soil in the spring.
Can egg shells be used as fertilizer?
Egg shells will add small amounts of calcium, potassium, a bit of sodium, but not enough to harm the plants, phosphorous and magnesium. They don't provide all the nutrients a plant needs but could be used as a supplement to your regular fertilizing regime. Mix them in the garden soil or potting mix prior to planting.
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