
Solanum lycopersicum
Tomatoes are popular annual plants that produce juicy, colourful fruits and thrive in warm conditions. They are native to South America and come in two main types, determinate and indeterminate. Determinate plants are bushy and self-supporting and indeterminate are tall plants that require staking and pruning.
Step-by-step instructions for growing Tomato
Change the guide to see different planting timelines and tips.
Grow tomatoes in a greenhouse for an earlier and longer harvest. This method provides protection from UK weather but requires ventilation and pollination attention.
Sow seeds in a greenhouse or indoors around 29th December - 13th January. Maintain a temperature of for germination. Use a propagator to ensure consistent warmth.
Prick out seedlings into individual pots around 19th January - 26th January once true leaves appear. Use a peat-free compost and keep plants in a bright, frost-free greenhouse.
Pot on into larger containers around 2nd February - 9th February to support root growth. Ensure the greenhouse is ventilated on sunny days to prevent damping off.
Plant into greenhouse beds or large pots around 12th February - 19th February. Space plants apart. Water well and consider using grow bags for container growing.
Install supports and train plants from 22nd February. Remove side shoots on cordon varieties and pinch out the tip after 6-7 trusses. Ventilate the greenhouse to reduce humidity and pollinate flowers by gently shaking plants.
Feed with a high-potassium fertiliser every 14 days from 5th December until 1st March. Water regularly to maintain even moisture, especially during fruiting, to prevent problems like blossom end rot.
Harvest ripe fruits from 5th December until 26th April. Pick regularly to encourage continuous production. In a greenhouse, harvesting can extend later into autumn compared to outdoors.
Plants that grow well (or poorly) with Tomato
Companion planting can help deter pests, improve pollination, enhance growth, and maximize garden space. Some plants release chemicals that repel pests or attract beneficial insects, while others can improve soil quality or provide shade for sensitive plants.
Popular varieties of Tomato to consider
A popular cherry tomato with sweet, abundant fruits. Ideal for UK gardens due to its reliability and good flavour.
A classic cordon variety producing medium-sized red fruits. Known for its high yield and disease resistance in UK conditions.
A trailing bush tomato perfect for hanging baskets or containers. Produces small red or yellow fruits without needing support.