Sensors and irrigation control systems are a growing solution to manage water use in horticulture. These are proving to be particularly effective in Almería, Spain where you can find one of the largest concentrations of greenhouses in the world. In this arid area on the south coast, water is a very scarce and expensive resource. Francisca Ferrer, local tomato farmer, is testing a set of sensors to optimise the fertigation of her plants. This system was developed in a national project (HORTISYS) which received ERDF funding.