The Growtub is a complete growing unit with a built-in plant support system, reservoir & moisture retaining lid, which seals in water & helps keep the planter moist. A unique 3 cane support system can hold the heaviest & most abundant cropping plants, whilst its robust polypropylene construction ensures your Growtub stays in tip-top condition all year round. Diameter 28cm (11); height 23cm (9). Canes not included. (Pack of 3).