Can I Use Egg Shells For Calcium In My Zucchini

Question

I have potted zucchini plants that have some yellow leaves. Is this a calcium deficiency and if so can I use egg shells for calcium?

Answer 1

Unfortunately, your photo did not come through. Many deficiencies cause yellowing, and it will depend on where the yellowing occurs and how it appears.

A soil test will tell you, without guesswork, what deficiencies you are looking at.

As far as calcium goes... eggshells are a wonderful source of calcium- AFTER it is composted. It will not be available in the near future for your plant to use.

Epsom salts will be a quick form of calcium when used as a foliar spray, but make sure that you actually have a calcium deficiency before you apply it. You wouldn't want to apply more calcium than is needed, or you risk locking out other nutrients.

Here are some articles that will help:

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/epsom-salt-gardening.htm

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/calcium-fertilizer.htm