You’ll need :12 empty eggshell halves from large eggs.
Easy to grow flower, vegetable and herb seeds.
Plastic egg carton.
Clear plastic bag larger than an egg carton.
Water spritzer or plastic squeeze bottle for watering
When it’s time to transplant the young plants outdoors, place them in the soil, eggshell and all. Crush the eggshells a bit and they will provide nourishment to the soil and your growing plants.
See more here
You should also see :
build a bench around a tree