Now, many containers can be self-watering AquaPots! The AquaPots Insert works in conjunction with AquaPots Lite round containers and many existing containers to create a self-watering pot. The 13.5 in. insert holds 2.9 Gal. of water and fits most 16-24 in. round containers with a drainage hole.Simply place the insert into the bottom of a round container, fill the remaining space with soil, plant your favorite Proven Winners plants, water the plants directly, and finish by filling the reservoir with water as well. We recommend watering the plants directly for the first 1-weeks to 2-weeks to ensure root development, after this only the reservoir needs to be filled every 1-weeks to 2-weeks as needed.An overflow valve ensures your plants can't be overwatered, even in heavy rain. You may also apply fertilize either directly into the soil or into the reservoir for easy and continuous fertilizing. Consistent moisture from the AquaPots insert helps to keep plants healthy and thriving all season - allowing you more time to sit back and enjoy your garden!