Nature's 3 Tier Stacking Planters - Self-Watering DesignNatures distributing original stacking planters are unique! nowhere else will you find our patented self watering system. Stack them up & create amazing floral displays! The self watering design allows water to trickle down to the planters from the top, sufficiently keeping your precious plants fed! Stacking planters are designed to be free standing or hung.