I saw an article on apartment therapy awhile back about using egg shells as seed starters. What a great idea! Many people compost their egg shells, so we know that they break down well. We don’t have to worry about frost in Northern California right now, but we still decided to plant some seeds indoors and watch them grow. When they are ready to put in the garden the egg shell goes into the ground too!
Every time I used an egg I’d rinse out the shells and set it aside. Pretty soon we had enough to start a dozen seedlings!