Tomato growbag planters (Sutton Farm SY2)

The serrated end is pushed into the growbag, fill up the middle of the pot with extra compost, plant your tomatoes deeper than normal (take off any leaves that will be buried), fill up the middle bit with compost, make sure that the holes are sitting on the top of the growbag compost. Feed and water your tomatoes by filling the channel with the holes at the bottom. There are six of these, enough for 2 to 3 growbags (ideally 3).