The compost is fresh and sterile which gives the plants the best start in life. Simply transplant the plants into the bags when the first tiny green fruits begin to develop in May or June. To provide reliable support, position a taut wire over the growing bag, attaching it to opposite ends of the greenhouse. 2 Puncture some drainage holes through the plastic bag with a sharp knife so that any excess water will run out and not waterlog the roots. Now cut evenly spaced planting holes along the bag.
Most bags can take either two or three plants.
Where each opening has been made, dig a hole in the compost large enough to take the young tomato plants. Take each plant out of its pot and loop the hanging support string under the root-ball. Lower the plant carefully into the hole. 4 Check the string has not become tangled with any of the other supports and that it is positioned to the rear of the plant. Then, to make sure the support is securely anchored, firm the compost around the rootball, keeping the string taut.