In The Vegetable Garden This May

May is a busy, exciting month in an vegetable garden—soil is warming up, growth speeds up, and you can finally get a lot planted outside. The key is timing and staying ahead of pests and weather swings.

🌱 Get tender crops in—but stay alert

You can usually plant out frost-sensitive crops like tomatoes, courgettes, pumpkins, and runner beans toward mid–late May. But don’t get overconfident—late frosts can still happen. Keep fleece or cloches handy just in case.

🥕 Sow little and often

Rather than planting everything at once, stagger sowings every 2–3 weeks. This works especially well for:

• Carrots
• Lettuce
• Radishes
• Beetroot

You’ll avoid gluts and have a steady harvest instead.

🥔 Earth up potatoes

As your potato plants grow, draw soil up around the stems. This protects developing tubers from light (which turns them green and toxic) and boosts yields.

🌿 Thin out seedlings early

It feels harsh, but overcrowded seedlings never thrive. Thin carrots, parsnips, and lettuce early so the remaining plants have room to grow strong.

🧅 Keep onions and garlic weed-free

These crops hate competition. A clean, weed-free bed makes a big difference to bulb size.

🪴 Harden off indoor plants

If you’ve started crops indoors or in a greenhouse, gradually acclimatise them to outdoor conditions over a week or so before planting out.

🐌 Stay on top of slugs and snails

Warm, damp May weather is perfect for them. Protect vulnerable crops like lettuce, beans, and young brassicas with barriers, traps, or regular evening checks.

🌸 Watch out for bolting

Unpredictable temperature swings can cause crops like spinach, lettuce, and rocket to bolt (go to seed). Keep soil moist and consider partial shade in hot spells.

💧 Water consistently

Seedlings and newly planted crops need steady moisture. Water deeply a few times a week rather than little and often—this encourages strong root systems.

🌽 Support climbing crops early

Put in canes or frames for peas and beans now. It’s much easier before plants get tangled.

🌼 Companion planting helps

Mix flowers like marigolds or nasturtiums among veg to attract pollinators and distract pests—plus it makes the garden look great.