We've shown you how to make self-watering planter boxes with plastic storage containers. If you want something a little more permanent for your backyard, The Family Handyman has a great design for a self-watering planter.
This build is fairly complex, but the resulting planters are attractive enough to show off in your garden, and can keep plants hydrated for weeks at a time without adding water. The design utilises porous plastic drainage tubes wrapped in fabric to soak the soil and let your herbs and vegetables sip water as needed. If you're interested in building one of your own, be sure to check out the guide on The Family Handyman.
Build Your Own Self-Watering Planter [The Family Handyman]