Mar 25, 2021 · Craft a Bottomless Plant Pot. To create your bottomless planter, you will need a plastic pot at least 10 inches (25.4 cm.) deep, potting soil and/or compost, a trowel or spade, and a box cutter. Cut out the bottom of the container with a box knife. Place the cylinder in the garden among your other plants or in a separate location in the yard.