square farmer 13-inch plant pot saucer plant riser pot elevator (5-pack) square farmer 2-products-in-1: a square plant saucer with a built in plant riser for greater root breath-ability, proper drainage, and simplified food regulation. helps avoids root and plant related problems by properly draining the waste water away from your indoor and outdoor plants. great for use with rock wool grow blocks. intended for 1-3 gallon pots. and, perfect for fabric pots. square shape makes it easy to place a shop vac nozzle into corner to remove excess liquid.