14", Bottoms Up Planting System, An Ideal Method For Most Vine Vegetable Plants, Herbs, & Even Strawberries, Vertical Growing Advantage Of Gravity Allows Water & Nutrients To Flow Directly To The Roots, Resulting In Robust Growth & Strong Root Systems, Simple To Set Up & Maintain, No Weeding Required, Features Built In Water Reservoir At Top, Reusable Season To Season.