🌱 February Sowing Guide for Greenhouses
February is a key sowing month for greenhouse growers. While outdoor conditions are still unreliable, the protection of a greenhouse allows you to start a wide range of crops early — giving stronger plants and earlier harvests later in the year.
Keter Manor Outdoor Apex Double Door Garden Storage Shed (6 x 8ft)
A durable and stylish beige and brown garden storage shed perfect for storing garden tools, equipment, bikes, and outdoor essentials. Weather-resistant, low maintenance, and ideal for any garden or allotment setup.
Seed Trays & Propagation Kits
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Heated Propagators & Grow Lights
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Seed Compost for Healthy Seedlings
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⭐ Recommended Products — February Gardening Essentials
• Early Spring Seed Collection (February Sowing)
A pack of seeds suited for February sowing — think early onions, brassicas, tomatoes, chillies, and early flowers like pansies and primroses. Great for getting a head start on the growing season.
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• Seed & Cutting Propagation Compost
Fine, well-draining compost formulated for seeds and cuttings. Essential for giving young roots the ideal environment to establish strongly without rotting.
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• Seed Trays & Propagator Kit
Includes reusable seed trays, modules, and clear lids to create a controlled germination environment. Helps maintain humidity and protects young seedlings.
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• Heat Mat & Grow Lights for Seed Starting
Provides bottom heat and supplemental light — especially helpful in February’s low light and cooler temperatures to improve germination and early growth.
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• Plant Labels & Waterproof Marker Set
Keep track of your sowings with durable labels and a weather-proof pen — very useful when starting lots of different seeds in February.
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🌿 Vegetables to Sow in a Greenhouse in February
These crops perform reliably under greenhouse protection.
🧅 Onions (from seed)
- Sow in trays or modules
- Ideal temperature: 10–15°C
Why sow now:
Long growing season — early sowing produces stronger plants and larger bulbs.
🥬 Leeks
- Sow thinly in trays or modules
- Keep cool but frost-free
Why sow now:
February sowings lead to thicker stems and better crops.
🥦 Brassicas (early varieties)
Includes:
- Cabbage
- Cauliflower
- Calabrese
- Brussels sprouts
How to sow:
- Sow in modules
Why sow now:
Creates sturdy transplants ready for early planting out.
🌿 Celery
- Surface sow (do not cover seed)
- Keep warm and moist
Why sow now:
Very slow-growing and needs an early start.
🌶️ Warmth-Loving Crops (Heated Greenhouse or Propagator)
Only sow these if you can provide steady warmth and good light.
🍅 Tomatoes
- Germination temperature: 18–22°C
🌶️ Chillies & Peppers
- Germination temperature: 20–25°C
🌿 Aubergines
- Germination temperature: 22–25°C
🌾 Crops to Sow in an Unheated Greenhouse
These tolerate cooler greenhouse conditions.
🥬 Lettuce (hardy varieties)
- Sow in trays or modules
- Protect from hard frost
🌱 Spinach
- Sow in modules
- Keep compost just moist
🫛 Peas (early varieties)
- Sow in guttering, pots, or modules
- Protect from mice
🌿 Broad Beans
- Sow in deep pots or modules
🌸 Flower Seeds to Sow in a Greenhouse in February
Greenhouses are ideal for early flower sowing.
- Sweet peas
- Antirrhinums
- Lobelia
- Petunias
- Begonias (from seed)
🌿 Herbs to Sow in a Greenhouse
- Parsley
- Chives
- Coriander
- Basil (only with warmth)
❄️ February Greenhouse Sowing Tips
- Clean greenhouse glass to maximise light
- Ventilate on mild days to prevent condensation
- Avoid overwatering cold compost
- Remove heat once seeds germinate
- Label everything clearly
⚠️ What Not to Sow Too Early
Avoid sowing these in February:
- Courgettes
- Squash
- Sweetcorn
- Climbing beans
They grow too fast and struggle under low light.