Aeroponics apparatus is disclosed, which includes a tray 4, 6 having a base 22 and at least two side-walls 8, the tray being able to hold a plant support at a position spaced from the base of the tray, and a nebulizer 29 for nebulizing nutrient solution, the nebulizer located at the base of the tray and comprising an ultrasonic transducer and a fixing portion for fixing the ultrasonic transducer in position. The base of the tray may be shaped to form a sump 24 to collect nutrient solution, and the nebulizer may be located at the sump. The transducer may be a piezoelectric transducer. Also disclosed is a method for crop production using the aeroponics apparatus by either flowing nutrient solution into the base of the tray to contact at least the roots of the crops, or providing nutrient solution at the base of the tray and nebulizing the nutrient solution so that the nebulized nutrient solution contacts at least the roots of the crops. The method may further comprise providing a root density sensor and nebulising nutrient solution to provide a predetermined droplet size distribution corresponding to a predetermined optimum droplet size for the density of the root bed
