Once your young tomato plants are large enough to plant into their final positions remove the lower set of leaves and bury the plant deeply - up to the top few leaves. They will develop roots all the way along the buried stem making them stronger and sturdier.
If you are planting in a grow bag make sure you have loosened the compost well before planting, these bags are always compacted when you buy them and need a good pummelling before they are suitable for use. Using the grow bag on its side instead of the normal way will give the deepest root run for your plants or try Growpots with the growbag. These give a much deeper growing depth to your growbag allowing for better watering and feeding and much greater root growth resulting in healthier plants and better cropping.
Another trick I have found that works with Tomatoes and grow bags is to lay your tomato plant on its side when planting, remove lower leaves and bury the stem up to the top few leaves. The plant will automatically straighten itself and grow upwards towards the light. This especially suitable if the plant has become a bit leggy and the stem is a bit wonky!
