Forgot to water the plants again? This self-watering planter is made from naturally porous unglazed earthenware. The water goes in the central chamber, and seeps gently out through the walls (the clever thing is the plants’ own capillary action determines the rate of water seepage, so there’s less risk of over-watering). Available from Joey Roth. Read more about the history of this kind of irrigation pot (called an ‘Olla’) here, it’s been used for hundreds of years and is now making a comeback.