June is a turning point in the UK gardening calendar. Summer is now fully underway, daylight hours are at their peak, and gardens are growing at full speed. While many assume sowing season is slowing down, June is still an important month for direct sowing, succession planting and filling gaps in the garden.
For allotment growers, home gardeners and beginners, June is about maintaining momentum, keeping crops coming, and planning for late summer and autumn harvests.
In this guide, we’ll explore exactly what to sow in June in the UK, including vegetables, herbs and flowers that thrive in warm soil conditions.
Quick Answer: What Can You Sow in June?
June is still a productive sowing month, especially for fast-growing and succession crops.
June is less about long-season heavy crops and more about fast turnaround, succession sowing and winter preparation.
Vegetables to Sow in June
Carrots
Carrots can still be sown in June, especially early and fast-growing varieties.
Key tips:
- Choose short-root varieties for best results
- Keep soil moist for germination
- Thin carefully to avoid competition
Good varieties: Nantes, Paris Market (round carrots), Amsterdam Forcing.
Beetroot
Beetroot remains one of the most reliable June crops.
Benefits:
- Fast germination in warm soil
- Multiple harvests possible
- Suitable for baby beet or full roots
Lettuce (Summer Varieties)
June heat can cause bolting, so choose heat-tolerant types.
Recommended varieties: Lollo Rosso, Salad Bowl, Little Gem (heat-resistant strains), Oakleaf.
Tip: Sow in partial shade for better results.
Spring Onions
Ideal for continuous sowing throughout June.
Harvest in as little as 8–10 weeks.
Radishes
One of the fastest crops available.
Perfect for filling gaps between slower-growing vegetables.
French Beans
Early June is still a good time to sow French beans.
- Sow directly outdoors once soil is warm
- Provide support for climbing varieties
Runner Beans
Runner beans can still be sown in early June in most UK regions.
Later sowings may still produce crops before autumn frosts.
Turnips
Turnips are a fast-growing, underrated crop ideal for June sowing.
- Quick harvest
- Both roots and leaves are edible
Pak Choi and Asian Greens
June is ideal for fast-growing leafy crops.
Best varieties: Pak choi, Mizuna, Tatsoi.
These grow quickly but may need protection from pests.
Kale (Winter Crops)
June is an important month for sowing kale for autumn and winter harvests.
- Very hardy
- Long harvesting season
- Excellent for overwintering
Herbs to Sow in June
Herbs grow rapidly in warm June conditions.
Basil
June is one of the best months for basil outdoors or in containers.
Coriander
Coriander can bolt quickly in heat, so sow in small batches.
Dill
Fast-growing and ideal for summer salads and pickling.
Parsley
Still suitable for sowing, but germination may be slower in heat.
Chives
Reliable perennial herb for containers and borders.
Flowers to Sow in June
June is still excellent for fast-growing, pollinator-friendly flowers.
Nasturtiums
Easy to grow, edible and ideal for companion planting.
Calendula (Marigold)
Blooms quickly and attracts beneficial insects.
Cosmos
Long-flowering and ideal for cutting gardens.
Sunflowers
Still possible in early June, especially dwarf varieties.
Nigella
Fast-growing with attractive flowers and seed pods.
Zinnias
Excellent for warm summer colour and cutting flowers.
What Can Be Planted Outdoors in June?
June is still a strong planting month for established seedlings and young plants.
You can plant:
- Courgette plants (early June only)
- Squash and pumpkin plants
- French bean plants
- Runner bean plants
- Sweetcorn seedlings
- Tomato plants (in warm, sheltered areas)
- Cucumber plants (greenhouse or warm outdoor spots)
- Salad plug plants
- Herbs in containers
MyGrowPal helps you manage summer challenges. Set your UK postcode and the app adjusts watering reminders, flags heatwave risks, and optimises succession sowing for your local conditions.
June Gardening Jobs
Watering Becomes Critical
June warmth increases evaporation rapidly. Water thoroughly early morning or evening, and consider mulching to retain moisture, especially for newly planted crops.
Succession Sowing
To avoid gluts and gaps, continue sowing small batches of fast-growing crops like lettuce, radishes, spring onions, beetroot, and carrots every 2-3 weeks.
Pest Management
June sees increased pest activity. Watch for slugs and snails, aphids, and caterpillars. Inspect plants regularly and use organic controls if necessary.
Support Fast-Growing Crops
Install supports early for climbing plants like beans, peas (for late crops), and cordon tomatoes to prevent damage and encourage healthy growth.
Weed Control
Weeds grow aggressively in June due to warmth and rain. Early and consistent removal prevents them from competing with your crops for vital nutrients and water.
Common June Sowing Mistakes
Letting Lettuce Bolt
Heat stress can cause lettuce to 'bolt' (flower), leading to bitter, unusable leaves. Choose heat-tolerant varieties and sow in partial shade during summer.
Forgetting Watering Consistency
Dry spells in June can quickly ruin germination of direct sowings and stress young plants. Consistent, deep watering is essential for success.
Overcrowding Succession Crops
While trying to maximize space, avoid overcrowding. June sowing requires careful spacing for good airflow and to prevent competition for resources, especially with rapid growth.
Ignoring Winter Planning
It's easy to focus only on summer, but June is a crucial time to sow winter crops like kale, Brussels sprouts, and sprouting broccoli for later harvests.
Using MyGrowPal to Plan June Sowing
June is one of the most active months in the gardening year, with constant sowing, planting, harvesting and maintenance.
MyGrowPal helps gardeners stay organised by turning a seed collection into a structured, weather-aware growing system.
Frequently Asked Questions
Is June too late to start a vegetable garden in the UK?
No. June is still excellent for fast-growing crops and succession planting.
What vegetables can I sow in June?
Carrots, beetroot, lettuce, beans, radishes, turnips and kale are all good options.
Can I still plant courgettes in June?
Yes, but early June is best for strong yields.
What flowers can I sow in June?
Cosmos, nasturtiums, calendula, zinnias and sunflowers all perform well.
What should I focus on in the garden in June?
Watering, pest control, succession sowing and supporting fast-growing crops are key priorities.
Final Thoughts
June is a high-energy month in the UK garden. While the early spring sowing rush is over, there is still plenty to sow, plant and manage. Success now depends less on starting everything and more on maintaining rhythm through succession planting and careful garden care.
With the right planning, June sowings will carry your garden through summer and into autumn harvests.
And with MyGrowPal, you can stay ahead of the season by tracking seed packets, managing sowing schedules, receiving weather-aware reminders and keeping your entire garden plan in one place—so nothing gets missed during the busiest time of year.