Transplant seedlings when large enough to handle into 7.5cm (3in) pots and grow on steadily at 15C (60F). Plant out when 20cm (8in) high, allowing 2 plants per growbag or one plant per 30cm (12in) pot. Can also be planted outdoors once risk of frost has passed. Feed regularly with a high potash tomato food once first flowers are setting. Stake plants if necessary.