Egg Shell Precautions for Compost and Birds

Calcium is a beneficial nutrient in your garden, a lack of calcium can result in deformed or curling of new leaves and poor root development.

Brassicas – cabbage, broccoli, cauliflower…- benefit from the addition of calcium. A good source of calcium not to overlook is egg shell. Whether using egg shells direct to the soil or in the compost bin they are a benefit to the garden. Tomatoes and peppers like crushed shells worked into the soil around them.

Wild birds also are attracted to a calcium offering when they cannot get it naturally from the soil surface. During the winter months I often put crushed egg shells on the bird feeding platform and they love it.

Before you start to toss all shells out for the wildlife or into the compost bucket there is a precaution. Egg shells are good for the garden, but not eggs, whether raw or cooked. Unless they have been thoroughly washed egg shells still have egg white inside, and raw egg breeds salmonella. This is not good in your garden and certainly not healthy for the birds.

All residue must be removed inside and out of the shell before using. Washing fragile shells can be quite a task so an easier method is to bake them. Place the shells on a cookie sheet and bake at 250o for 30 minutes. This will sterilize the shells and make it safe for garden and wildlife. Let the shells cool down completely and if you are feeding them to the birds the pieces should be broken to under ¼”.

For the garden, direct or composter, they need to be smaller still. A simple way to crush the shells is to place them between paper towels, wax paper or newspaper and using a rolling pin or a can crush to a fine grit. This will speed up the breakdown for plants to absorb and when sprinkled direct around the base of a plant the small shards inhibit slugs and many other crawling pests.

A few simple steps and egg shells are a great enhancement in your backyard for healthy plants and birds.