🌱🌼 What Vegetables Can You Plant in March in the UK?
🥕 Introduction: March Signals the Start of the Main Growing Season
March is when the UK gardening year truly begins. Soil temperatures start to rise, daylight increases rapidly, and many vegetables can now be sown both under cover and directly outdoors, depending on local weather and soil conditions.
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This guide explains exactly which vegetables you can plant in March in the UK, helping you make the most of early spring and build a productive growing season from the very start.
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• Garden Fork & Rake
Perfect for preparing soil for early spring sowing.
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🌱🥬 Vegetables You Can Plant in March (UK)
🥕 Carrots
March is the traditional start for carrot sowing.
✔ sow directly outdoors
✔ choose early varieties
✔ improve germination with cloches
Avoid stony soil for straighter roots.
🧅 Onions (Seeds or Sets)
Both seeds and sets can be planted now.
✔ sow seeds outdoors or under cover
✔ plant onion sets directly
✔ cold-tolerant and reliable
Good drainage prevents rot.
🥔 Potatoes (Chitting Begins)
While not planted everywhere yet, preparation starts now.
✔ chit seed potatoes
✔ early varieties can be planted late March
✔ frost protection may be needed
Shelter is essential for early planting.
🥬 Lettuce
Lettuce thrives in cool spring weather.
✔ sow indoors or outdoors
✔ quick-growing crop
✔ succession sow for continuity
Protection helps early sowings.
🌱 Spinach
Spinach grows rapidly in March.
✔ sow directly outdoors
✔ cold-hardy and nutritious
✔ ideal for early harvests
Keep soil moist for best results.
🟢 Peas
March is a key month for peas.
✔ sow outdoors
✔ choose early varieties
✔ provide support early
Peas tolerate cool soil well.
🌿 Broad Beans
March sowings complement autumn and winter plantings.
✔ sow directly outdoors
✔ hardy and reliable
✔ less pest pressure early
Strong plants cope well with spring weather.
🥦 Brassicas (Under Cover)
Start brassicas indoors for later planting.
✔ cabbage
✔ cauliflower
✔ broccoli
These benefit from early starts.
🌶️ Chillies & Peppers
March is the last ideal month for sowing.
✔ sow indoors with warmth
✔ ensure good light
✔ pot on regularly
Later sowings reduce yields.
🍅 Tomatoes
Tomatoes can be sown indoors now.
✔ suitable for greenhouse and outdoor types
✔ requires warmth and light
✔ transplant after frost risk
Avoid cold draughts.
🌿 Herbs (Edible)
Many herbs can be started now.
✔ parsley
✔ coriander
✔ chives
Grow indoors or outdoors depending on weather.
❄️🌤️ Can You Sow Vegetables Outdoors in March?
Yes, many vegetables can be sown outdoors.
✔ carrots
✔ peas
✔ spinach
✔ onions
✔ broad beans
Always check soil temperature and weather forecasts.
🚫🌱 Vegetables Still Best Left Until Later
Some crops prefer warmer soil.
❌ courgettes
❌ squash
❌ pumpkins
❌ sweetcorn
❌ French beans
These should wait until April or May.
🌟 FAQs
Is March the best month to start vegetables in the UK?
Yes. It marks the start of the main sowing season.
Do I still need frost protection in March?
Yes. Late frosts are common in many areas.
Can I plant potatoes in March?
Early varieties can be planted late March with protection.
Should I sow seeds indoors or outdoors in March?
Both, depending on the crop and weather conditions.
Is March suitable for beginners?
Yes. Many easy vegetables can be started now.