Growing tomatoes from seed
There are many different types of tomato, including cherry, plum and beefsteak, each with its own distinctive shaped fruit, flavour and culinary use. They grow in one of two ways – either as a bush, or trained as a cordon, which is a tall single stem.
Tomatoes are available as young plants, but if you’d like to try some of the more unusual varieties it’s worth growing them from seed.
Start sowing in late January. Sow seeds in 7.5cm pots of moist compost, top with a thin layer of vermiculite, then water and cover with cling film. Stand on a warm, bright windowsill or in a propagator.
When your seeds have germinated, remove the cling film (or take them out of the propagator) and keep the compost damp. Transplant seedlings when they reach about 2-3cm tall into 5cm pots filled with moist multi-purpose compost. Return them to the windowsill. Keep potting on as necessary. Support stems by tying them to a pea stick with soft string.
Tending the crop
Tall-growing cordon tomatoes will require pinching out (removing side shoots) and staking (tying plants to canes with soft string). When the first tiny fruits begin to appear, strip away the leaves underneath to allow light and air to reach them better. When there are four trusses (clusters) of flowers, pinch out the plant’s growing tip.
Once flowers appear, feed your plants weekly with liquid tomato food, such as Tomorite. Keep tomatoes well watered because irregular watering causes fruit to split or develop hard black patches, known as blossom-end rot. This is caused by a lack of calcium, which is found in water.
With bush tomatoes, which have a sprawling habit, you can pretty much leave them to get on with it. If the fruits are hidden under the leaves, thin out the foliage a little to let the sun through to ripen them. Support heavy trusses on top of upturned flowerpots to prevent their stems snapping.