Save your eggshells. Half an eggshell can be filled with soil and used to grow seedlings in. Once the seedlings have outgrown the eggshells, they can then be crushed and added to the compost heap which will add much needed calcium to the makeup of your final compost. You do not necessarily need to crush the eggshells first but it does help them to break down faster.
Frugal Gardening Tips
Posted on 29th March 2016 by Gardening Express.