With this DIY spiral garden, gravity allows water to drain freely from the top of the spiral and seep to all layers, creating a dry zone at the top and moist area at the bottom. This gives you many op (Garden Step Water)
keep shells in open container in fridge. When full, crush shells into small bits and sprinkle around base of plants. Sharp eggshells will deter slugs, snails, and other bugs from nibbling on garden and add touch of calcium to soil.