March Gardening Checklist for UK Gardens: Tasks to Boost Your Spring

March is the month when gardens truly begin to wake up. Longer days, rising temperatures and increased soil activity mean there’s plenty to do - and getting jobs done at the right time can make a huge difference to your garden’s success this spring.

This step-by-step March gardening checklist covers the most important tasks for UK gardens, allotments and greenhouses.

🌱 1️⃣ Start Sowing Seeds Under Cover

March is ideal for sowing many vegetables and flowers indoors or in greenhouses.

• Tomatoes, peppers and aubergines (with heat)
• Courgettes, cucumbers and squash
• Hardy annual flowers and summer bedding

Use clean seed trays, fresh compost and ensure plenty of light to avoid weak growth.

✂️ 2️⃣ Prune Roses, Shrubs & Climbers

Finish winter pruning before plants enter full growth.

• Prune bush and climbing roses
• Cut back buddleia and late-flowering shrubs
• Finish wisteria winter pruning

Avoid: Pruning spring-flowering shrubs, as this will remove flower buds.

🌼 3️⃣ Tidy Borders and Clear Winter Debris

Border tidying improves air circulation and reduces disease risk.

• Remove dead stems and leaves
• Cut back ornamental grasses if not already done
• Leave some areas undisturbed for wildlife

🌷 4️⃣ Plant Summer-Flowering Bulbs

March is the perfect time to plant bulbs that bloom later in the year.

• Dahlias
• Gladioli
• Lilies

Plant in free-draining soil and protect from late frosts.

🌿 5️⃣ Prepare Beds and Improve Soil

As soil becomes workable, preparation now saves time later.

• Lightly dig over empty beds
• Add compost or well-rotted manure
• Rake soil level ready for sowing

🏡 6️⃣ Maintain Greenhouses & Cold Frames

Clean and organise protected growing spaces.

• Wash glass to maximise light
• Disinfect staging and pots
• Check heaters and ventilation

🌾 7️⃣ Sow Hardy Crops Outdoors (Weather Permitting)

In mild conditions, hardy vegetables can be sown outside.

• Peas and broad beans
• Spinach and beetroot
• Early carrots

🛠️ 8️⃣ Check and Maintain Garden Tools

Ensure tools are ready for the busy season.

• Sharpen secateurs and spades
• Disinfect cutting tools
• Repair or replace damaged equipment

❄️ 9️⃣ Protect Against Late Frosts

Frosts are still possible in March.

• Keep fleece and cloches handy
• Protect tender shoots and seedlings
• Ventilate during warm days to prevent disease

🐦 🔟 Support Wildlife

As wildlife becomes more active:

• Clean bird feeders regularly
• Provide fresh water
• Delay hedge cutting once nesting starts

March is one of the busiest and most rewarding months in the gardening calendar. By tackling these tasks now — and adjusting for local weather - you’ll give your garden the best possible start to the spring growing season.