Product details:

Maintain healthy container gardens using a Self-Watering Planter Insert. This 16.5 inch Round model features a self-fill tank, water wick and moisture level monitor. The fill hole is large enough to fit a garden hose and the vacuum-sensor technology conserves water by only allowing the plant to drink when soil begins to dry. Water-smart planter inserts also minimize evaporation off the top layer of soil and catch rainwater to refill the tank while draining any excess runoff. Another perk is that self-watering planter tanks do not sweat, so terra cotta pots won't have any unsightly water stains. This size is designed for use in a 22 inch garden container and will extend watering intervals up to 4 times beyond regular hand-watering schedules. Streamline your watering and watch flower arrangements thrive with this smart self-watering irrigation system.