What is Farm TubFarm Tub is a registered trademark for decorative self-watering planters and growing systems for vegetable and flower gardening. Farm Tub Planters and DIY Self-Watering Kits utilize a water reservoir and capillary wick system that is easy to manage and self-irrigates once plants are established. For effectiveness the system requires the use of a high-grade potting soil such as Black Gold Natural and Organic Potting Soil. Farm Tub growing systems are available as part of a custom-made Farm Tub Planter or as a Do It Yourself Kit to convert existing planters or stock tanks to become self-watering. Water conscious gardeners as well as travelers love the Farm Tub growing system because they dont have to worry about watering as often or while away. Grow your own food herbs and flowers while maximizing yield and conserving water. We ship DIY kits of all sizes and planters with the integrated system up to 2x2x4 ft or smaller. Larger planter sizes available for pick up in Colorado.