April is one of the most important months for allotment holders. As the days lengthen and soil temperatures begin to rise, your plot shifts from preparation to full-scale production.

But the British April weather is famously unpredictable. Warm, sunny afternoons can quickly give way to sharp overnight frosts - so timing and protection are everything.

This guide covers exactly what to do in your allotment in April to set yourself up for a productive growing season.

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Top April Allotment Priorities

• Finish planting potatoes (second earlies and maincrops)
• Start tender crops indoors like courgettes and squash
• Direct sow hardy vegetables such as carrots, beetroot, and peas
• Stay on top of weeds, slugs, and aphids
• Protect young plants from late frosts

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🥔 1. Planting Potatoes: Timing is Everything

By April, your first early potatoes should already be in the ground. Now it’s time to focus on second earlies and maincrops.

• Second Earlies: Plant in early to mid-April
• Maincrop Potatoes: Plant from late March through April, depending on conditions

👉 Top Tip: Aim to plant when soil temperatures are consistently above 7°C. Cold, wet soil can cause seed potatoes to rot before they establish.

If frost is forecast, earth up potatoes by drawing soil over emerging shoots to prevent frost damage.

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🌿 2. What to Sow Indoors (Under Cover)

Even if the sun feels warm, the soil is often still too cold for tender crops. Use a greenhouse, polytunnel, or sunny windowsill.

Final Call for Heat-Lovers

April is your last chance to sow:

• Tomatoes
• Chillies
• Aubergines

Sowing later risks fruit not ripening before autumn.

Start Fast-Growing Cucurbits

Sow in individual pots:

• Courgettes
• Pumpkins
• Squash
• Marrows

These grow quickly, so avoid sowing too early or they’ll become root-bound before planting out.

👉 Light Matters: Ensure seedlings get plenty of light (ideally a south-facing window or grow lights) to prevent weak, leggy growth.

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🌾 3. Direct Sowing Outdoors

April is when outdoor seed beds truly come to life.

Root Vegetables

• Sow carrots and beetroot directly into the soil
• Sow thinly to reduce the need for thinning, as the scent released can attract carrot fly

Legumes

• Peas and broad beans can be sown directly

If pests like mice are an issue:

• Start seeds in root trainers or guttering indoors
• Transplant when plants are around 10–15cm tall

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4. Essential Maintenance & Pest Control

April showers don’t just help crops - they boost weeds and pests too.

Hoeing

Hoe on a dry, breezy day to kill young weeds by drying out their roots.

Perennial Weeds

Dig out deep-rooted weeds like:

• Dandelions
• Docks
• Nettles

Tackle them now before they become established.

Slug Watch 🐌

April is peak time for slug damage. Protect seedlings by:

• Using barriers or traps
• Checking plants at night
• Removing hiding spots like debris and old leaves

Aphid Control

Check soft growth on:

• Broad beans
• Fruit bushes

Remove aphids with:

• A strong spray of water
• Horticultural soap if needed

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5. Plan Ahead: Crop Rotation

Avoid planting potatoes (or other crops) in the same place as last year.

Crop rotation helps:

• Prevent soil-borne diseases (like blight)
• Maintain soil fertility
• Improve overall yields

✅ April Allotment Checklist

• Plant second early and maincrop potatoes
• Sow tomatoes, courgettes, and squash indoors
• Direct sow carrots, beetroot, peas, and beans
• Hoe weeds regularly
• Protect crops from frost
• Watch for slugs and aphids
• Plan crop rotation

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April is a month of transition - and opportunity.

While it’s tempting to plant everything at once, success comes from timing, observation, and patience. Keep an eye on soil temperature, watch the weather closely, and stay on top of maintenance.

By the end of April, your allotment should be thriving - and perfectly positioned for a productive summer ahead.

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