Nancy Jane's Self Watering Stacking Planters have a patented self watering system. Stack them or hang them to create outstanding flower displays. Stacking Planters are specifically designed so that when stacked they produce a column of multiple growing facets that may be suspended by a chain or left freestanding on your patio. Stacking planters are perfect for annuals, herbs, strawberries, and even spectacular silk arrangements. See www.stackingplanters.com for planting ideas.