Space plants: 20 - 30 cm apart Compatible with (can grow beside): Carrots, Onions, Strawberries, Beets, Brassicas, Radish, Marigold, Borage, Chervil, Florence fennel, leeks Avoid growing close to: Parsley, Celery Lettuce offer a range of shapes, sizes and colours but they are all easy to grow. Choose a variety marked on the seed packet as suitable for the time of year as some do badly in the very hot months. Try to provide some shade to prevent them 'bolting' to flower and seed in the hottest months. Sow in rows and use thinnings as small salad greens Lettuce are shallow rooted so water daily in hot or dry weather to prevent bitter flavour. and bolting.