What to Sow in June in the UK: Your Breakout Guide

Introduction
June in the UK brings long days, warmer soil, and reliable moisture—perfect for sowing a second wave of crops, extending harvests, and filling gaps in your borders. Whether you have allotments, raised beds, containers, or window boxes, knowing what to sow in June ensures continuous production of vegetables, herbs, flowers, and even cover crops to nourish your soil. This guide covers:

• Quick summer vegetables for ongoing harvests
• Second sowings of salad leaves for continuous picking
• Heat-loving crops that thrive in June warmth
• Herbs to refresh your kitchen garden
• Flowers to boost late-summer colour and pollinators
• Green manures & cover crops to feed soil in autumn
• Succession sowing strategies
• Top 10 Q&A to tackle your June sowing queries
• Meta description for easy reference

1. Quick Summer Vegetables for Continuous Harvests

1.1 French and Runner Beans

• Sow: Direct into 15–20 cm drills once soil is 12–15 °C.
• Harvest: 8–10 weeks later; succession sow every 2–3 weeks.
• Keywords: June bean sowing, UK bean harvest.

1.2 Courgettes and Summer Squash

• Sow: In modules under cover or direct into soil 2–3 cm deep, 60 cm apart.
• Harvest: From July onward; prolific producers.
• Keywords: June courgette sowing, summer squash UK.

1.3 Fast-Maturing Greens

• Rocket, Mizuna & Salad Leaves: Sow thinly in trays or drills; 5–7 days to germinate.
• Harvest: Cut-and-come-again from 4 weeks.
• Keywords: salad sowing June, continuous salad harvesting.

2. Heat-Loving Crops That Thrive in June Warmth

2.1 Sweetcorn

• Sow: In blocks of four, 2 cm deep and 30 cm apart, in the warmest, sunniest spot.
• Harvest: Late summer.
• Keywords: UK sweetcorn sowing, June maize.

2.2 Basil and Chilli Peppers

• Sow: In modules under glass, transplant after hardening off.
• Use: Fresh pesto and spicy stir-fries.
• Keywords: basil sowing June, chilli pepper seed UK.

3. Second Sowing of Salad Leaves & Roots

3.1 Leaf Chicory & Summer Spinach

• Sow: Thin rows in partial shade to avoid bolting.
• Harvest: Succession sown every 3 weeks.
• Keywords: summer spinach sowing, chicory June.

3.2 Carrots & Radishes

• Sow: Fast-maturing varieties (‘Nantes’, ‘Cherry Belle’) in fine tilth.
• Harvest: 4–6 weeks for radish, 10–12 for baby carrots.
• Keywords: June carrot sowing, radish sowing UK.

4. Herbs to Refresh Your Kitchen Garden

4.1 Coriander & Dill

• Sow: Direct at 1 cm deep; harvest leaves and seeds later.
• Succession: Every 3 weeks for fresh flavour.
• Keywords: June herb sowing, coriander UK.

4.2 Thai Basil & Lemon Balm

• Sow: In pots or plugs outdoors after last frost; use for summer cocktails and curries.
• Keywords: lemon balm sowing, Thai basil June.

5. Flowers for Late-Summer Colour & Pollinators

5.1 Calendula & Cosmos

• Sow: Direct into borders; 1 cm deep, 30 cm apart.
• Benefit: Attract bees and hoverflies.
• Keywords: June flower sowing, pollinator flowers UK.

5.2 Sunflowers & Zinnias

• Sow: In blocks for dramatic height and colour.
• Cut Flowers: Harvest stems for vases.
• Keywords: sunflower June UK, zinnia sowing.

6. Green Manures & Cover Crops to Feed Your Soil

6.1 Phacelia & Buckwheat

• Sow: After early crops finish, create a green mulch by autumn.
• Benefits: Suppress weeds, add organic matter.
• Keywords: June green manure, cover crops UK.

7. Succession Sowing Strategies

1. Staggered Rows: Sow smaller batches every 10–14 days.
2. Mixed Beds: Combine quick salad with slower beans for continuous use.
3. Intercropping: Plant fast greens between slower brassicas for efficient space use.
4. Keywords: succession sowing June, intercropping UK.

Conclusion

June’s combination of warmth, daylight, and moisture makes it a prime month to boost your garden’s productivity and beauty. By sowing summer vegetables, heat-loving greens, fresh herbs, vibrant flowers, and soil-nourishing cover crops, and using succession strategies, you’ll enjoy a continuous yield and a burst of colour from mid-summer well into autumn.

Top 10 Questions & Answers

1. Can I sow beans in June?
   Yes—French and runner beans thrive when soil is above 12 °C; succession sow every 2 weeks.
2. What salad leaves are best for June sowing?
   Rocket, mizuna, and leaf lettuce—germinate in 5–7 days and cut-and-come-again.
3. How deep should I sow courgette seeds?
   2–3 cm deep, spaced 60 cm apart in fertile, well-drained soil.
4. Are herbs like basil okay to sow outdoors in June?
   Yes—after hardening off, sow basil and chillies in modules then transplant.
5. Which flowers attract pollinators when sown in June?
   Calendula, cosmos, sunflowers, and zinnias are ideal for bees, butterflies, and hoverflies.
6. Can I still sow carrots and radishes in June?
   Absolutely—choose fast-maturing varieties for baby roots in as little as 4 weeks.
7. What cover crops can I sow mid-year?
   Phacelia and buckwheat grow rapidly to feed soil and suppress weeds before autumn.
8. How often should I succession-sow salad leaves?
   Every 10–14 days for a continuous harvest through summer.
9. Do summer crops need extra feeding?
   Side-dress beans with compost and feed courgettes fortnightly with a balanced fertiliser.
10. How much water do June-sown seeds need?
    Keep seedbeds consistently moist with gentle watering until seedlings establish, then water deeply twice weekly.