Five different types of plants in concrete pots 71117145 Stock Photo at Vecteezy Some Good Reasons To Plant Pots For Spring Deborah Silver & Co. Seeds with the Fastest Germination Quick Growing Vegetables & Flowers trailingpetunia.com one the biggest indoor gardening myths is that rocks will create drainage in the bottom of a planter without drainage holes. but without an actual drainage hole, theres no where for the water to go!