🍅 Tomatoes
Tomatoes are one of the most rewarding crops to grow, offering delicious, juicy fruits that taste far better than anything store-bought. Whether you’re an experienced gardener or a beginner, growing tomatoes in the UK can be highly successful with the right approach. This guide will walk you through everything you need to know.
Understanding Tomatoes
Tomatoes (Solanum lycopersicum) are warm-season crops that require plenty of sunlight and warmth to thrive. They come in various shapes, sizes, and flavors, making them a versatile addition to any garden.
Choosing the Right Variety
Selecting the right tomato variety is crucial for success in the UK climate. Some of the best types for UK growers include:
* Cherry Tomatoes – Sweet and easy to grow, ideal for beginners (e.g., ‘Gardener’s Delight’).
* Beefsteak Tomatoes – Large and meaty, perfect for slicing (e.g., ‘Brandywine’).
* Plum Tomatoes – Great for sauces and pastes (e.g., ‘Roma’).
* Bush (Determinate) Tomatoes – Compact and great for containers (e.g., ‘Tumbling Tom’).
* Cordon (Indeterminate) Tomatoes – Require staking but produce a steady harvest (e.g., ‘Alicante’).
Selecting the Best Location
Tomatoes need at least 6-8 hours of direct sunlight per day. In the UK, a greenhouse, polytunnel, or sunny, sheltered spot is ideal for ensuring adequate warmth.
Preparing the Soil
Tomatoes thrive in rich, well-drained soil. Follow these steps for optimal growth:
1. Loosen the Soil – Dig at least 12 inches deep.
2. Add Organic Matter – Mix compost or well-rotted manure for nutrients.
3. Check pH Levels – Tomatoes prefer slightly acidic to neutral soil (pH 6.0–6.8).
4. Ensure Good Drainage – Avoid waterlogged conditions, which can lead to root rot.
Young Tomato plants still in the seed tray before potting 0n into 12″ pots. Image courtesy of Allotment Junkie ©
Tomato flower in spring at Allotment Junkies. Image courtesy of Allotment Junkie ©
Planting Tomatoes
Tomatoes can be grown from seed or purchased as young plants. Here’s how to plant them successfully:
When to Plant
* Indoor Sowing: Start seeds indoors in February-March.
* Outdoor Planting: Move plants outside after the last frost, typically in late May or early June.
* Greenhouse Growing: Plant from April onwards for an earlier harvest.
How to Plant
1. Sow Seeds – Start seeds in small pots with seed compost.
2. Provide Warmth – Keep them at 18-21°C until germination (7-14 days).
3. Transplant Seedlings – Once they have two true leaves, move them into larger pots.
4. Harden Off Plants – Before planting outside, gradually expose them to outdoor conditions over 7-10 days.
5. Plant Deep – Bury the stem up to the first leaves to encourage strong root growth.
A side shoot on the left side of the Tomato vine that needs to be ‘pinched out’ to allow for strong fruits on the flowering right side. Image courtesy of Allotment Junkie ©
Plum Tomatoes on the vine grown by Allotment Junkie. Image courtesy of Allotment Junkie ©
Caring for Tomatoes
Watering
* Keep soil consistently moist but not soggy.
* Water at the base of plants to avoid fungal diseases.
* In hot weather, water early in the morning or late in the evening.
Feeding
* Use a high-potassium fertiliser (e.g., tomato feed) once flowers appear.
* Feed every 7-10 days for healthy fruit development.
Supporting Growth
* Cordon (Indeterminate) Varieties: Stake plants and remove side shoots to focus energy on fruit production.
* Bush (Determinate) Varieties: Require minimal support but benefit from mulch to retain moisture.
Pruning
* Remove lower leaves as plants grow to improve air circulation.
* Pinch out the top of the plant once it reaches its support’s height.
Beef Tomatoes grown by Allotment Junkie. Image courtesy of Allotment Junkie ©
Common Pests and Diseases
* Aphids – Spray with a jet of water or use natural predators like ladybirds.
* Tomato Blight – Prevent by spacing plants well and avoiding overhead watering.
* Whiteflies – Use sticky traps or insecticidal soap.
* Blossom End Rot – Avoid calcium deficiency by keeping soil moisture consistent.
Harvesting Tomatoes
Tomatoes typically ripen 60-80 days after planting.
How to Harvest
* Pick when fruits are fully colored and slightly soft to the touch.
* If frost threatens, pick green tomatoes and ripen indoors on a windowsill.
Storage Tips
* Store at room temperature to maintain flavor.
* Refrigerate only if overripe to extend shelf life.
Growing Tomatoes in Containers
Tomatoes grow well in pots if they have enough space and nutrients. Use a container at least 12 inches deep, ensure proper drainage, and feed regularly.
Companion Planting
Good companions for tomatoes include:
- Basil – Improves flavour and repels pests.
- Marigolds – Deter whiteflies and aphids.
- Garlic & Onions – Help prevent fungal diseases.
Avoid planting near potatoes, as both can suffer from blight.
Troubleshooting Common Issues
Poor Fruit Set
* Hand-pollinate flowers by gently shaking the plant.
* Avoid overfeeding with nitrogen, which encourages foliage instead of fruit.
Cracking or Splitting Fruits
* Ensure even watering to prevent fluctuations in moisture levels.
Yellowing Leaves
* Could indicate nutrient deficiency or overwatering.
* Apply balanced feed and improve drainage if necessary.
Tomato Blight. Image courtesy of Allotment Junkie ©
Tomato nutrient deficiency or overwatering. Image courtesy of Allotment Junkie ©
Cracking or Splitting Fruits: Ensure even watering to prevent fluctuations in moisture levels. Image courtesy of Allotment Junkie ©
Conclusion
Growing tomatoes in the UK is incredibly rewarding with the right preparation and care. Whether in a greenhouse, garden, or container, following these guidelines will ensure a bountiful harvest of delicious homegrown tomatoes!
Tomatoes ‘Gardeners Delight’ grown by Allotment Junkie. Image courtesy of Allotment Junkie ©
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