FHD square growing pots provide greater capacity for growing mediums and provide a better fit when used in combination with flood and drain tables. Fill them with soilless mix, soil, granulated rockwool, rocks, coco peat, perlite, vermiculite, or your favorite combination. These commercial greenhouse quality pots are made of durable and recyclable black polypropylene for years of reliable growing.Drainage is provided for at the base of the pot, and the molded rim is a convenient grip spot when transporting or rotating your pots within your gardening area.