Starting a rose bush and other plants from a cutting (slip). I Remember my Maternal Grandmother and Mother placing rose slips around the flower garden, covered with Mason jars to protect them and get them started. Many a rose bush grew.
Dont throw out the water your boil your eggs in. This water contains tons of calcium that your plants will love. Just let the water cool and dump it on your plants. I also save my egg shells, rinse them out real well, smash them up then mix them with dirt