"Large-capacity" doesn't do this planter justice. This thing is HUGE. And although we designed our newest planter for tomato-growing success, we discovered it's awesome for flowers and trailing vines too. Vented sides and an inner liner promote air pruning for robust, healthy roots. An innovative self-watering system — a base reservoir with evaporation grid and wicking capillary strip — ensures consistent hydration even on the hottest, sunniest summer days. Optional casters, sold separately, make this container really easy to move — perfect for shifting sunlight over the course of a season or for a mix of sun- and shade-tolerant plants. Years in the making and tested all the way from Vermont to California, you can now create lush, living floral arrangements without breaking a sweat!