June is a glorious month for UK gardens. The days are long, the sun is warm, so it's quite pleasant to be outdoors, admiring the summer colours. With borders blooming and vegetable patches beginning to reward your efforts, June offers plenty to enjoy – and plenty to do.
This month is all about staying on top of growth, keeping plants healthy, and making the most of the vibrant display. It’s the time for planting out tender crops like courgettes and beans, deadheading roses to keep the blooms coming, and sowing fast-growing salad leaves for fresh summer pickings.
In this guide, we’ll share 20 of the best gardening tips for June, alongside a list of top-performing perennial summer plants to grow in June, so you can keep your garden thriving all summer long.
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Boma’s Top 20 Gardening Tips for June
Here at Boma, our horticultural team knows that June success is all about staying one step ahead: feeding, pruning, sowing, and supporting the plants you nurtured through spring.
Below, we’ve gathered Boma’s top 20 practical tips to keep your garden at its best this June. These are the tasks our experts prioritise this month to keep your garden productive, healthy, and full of joy.
- Sow basil, lettuce, radish, beetroot, and salad leaves regularly for a continuous summer supply.
- Sow nasturtiums and other nectar-rich wildflowers to attract bees and brighten up your beds.
- in flower beds and vegetable gardens to attract pollinators. Nasturtiums also act as a sacrificial crop to lure aphids away.
- Plant out seedlings of courgette, tomato, pepper, sweetcorn, runner beans, French beans, and squash.
- Provide supports for climbing varieties or choose dwarf types for pots.
- Harden off and plant out tender vegetables like beans, courgettes, and tomatoes.
- Stake cordon tomatoes and pinch out any side shoots.
- Feed tomato plants and other container-grown vegetables (e.g., dwarf beans, courgettes) fortnightly with a high-potash (tomato) feed.
- Deadhead repeat-flowering roses and pick sweet peas regularly to encourage more blooms.
- First early potatoes should be ready once flowering; dig a few to check size before harvesting fully.
- Harvest garlic and onions once their leaves yellow and flop over.
- Net strawberry plants as they ripen to protect berries from birds.
- Prune spring-flowering shrubs like Weigela, Forsythia, flowering currant (Ribes), and Philadelphus by removing dead/damaged growth and cutting flowered shoots back to strong side shoots. Rejuvenate by cutting one in every three or four old stems to the base. Prune summer-flowering shrubs like Philadelphus and Weigela after blooming.
- Give Wisteria its summer prune by cutting this year’s long shoots back to 20cm.
- Once hardy geraniums finish flowering, cut them back for new growth and blooms.
- Fill pots and hanging baskets with summer bedding like geraniums, petunias, begonias, lobelia, and busy lizzies. Feed fortnightly with a high-potash feed.
- Mow lawns weekly. In dry weather, mow less often and with a higher blade setting. Consider leaving some areas uncut to support wildlife.
- Keep weeds under control by hoeing beds on dry days and leaving weeds to dry on the surface.
- Water plants in the morning or evening to reduce evaporation. Install water butts to collect rainwater.
- Open greenhouse vents on hot days and use shade paint or blinds to prevent overheating.
- Always check for nesting birds before trimming hedges or shrubs.
With these simple yet effective tasks, your garden can truly thrive through June. For even more summer colour and inspiration, explore Boma’s top perennial picks below, perfect for transforming your borders, planters, and beds with long-lasting beauty.
Boma’s Perennial Picks for a Colour-Filled June
Now that you know what jobs to be getting on with this month, If you’re looking to elevate your borders or refresh your planters, our outdoor team has chosen a standout selection of perennial stars to plant now, available in abundance at Boma Garden Centre.
Here are Boma’s outdoor horticultural team’s top perennial picks for June! These June jewels are featured in the garden centre, ready to transform your outdoor space.
1: The Delicate Dancer: Gaura
With its airy white or pink flowers that flutter like butterflies, Gaura (Gaura lindheimeri) adds grace and softness to the border. Varieties like 'Gaudi White', 'Freefolk Rosy’, and ‘Gaura 'Pink' bloom right through to autumn. Drought-tolerant, sun-loving, and low maintenance, it’s a front-of-border essential.
2: The Fairytale Favourite: Foxgloves
No June garden is complete without the whimsical spires of Digitalis. With bees tumbling into their bell-shaped blooms, these cottage garden icons offer height and romance. Look out for 'Lucas', Goldcrest, 'Rose Ivory', 'Plum Gold', 'Sweet Dream', and 'Giant Spotted' Foxglove varieties at Boma this month.
3: The Colourful Chameleon: Penstemons
Penstemons are summer stalwarts, blooming for weeks in bold shades from violet to cherry red. Our top choices here at Boma include 'Electric Blue', 'Apple Blossom', 'Phoenix Violet', and 'Phoenix Red'. Perfect for borders, bee-friendly, and easy to grow in full sun.
4: The Sun-Kissed Star: Crocosmia
Lighting up the garden like miniature flames, Crocosmia (including 'Emily McKenzie', ‘Lucifer', ‘Miss Scarlet' and ‘Bright Eyes') are striking, sun-loving perennials that bloom in bold oranges and reds. Their arching stems and sword-like foliage make a dramatic statement.
5: The Fragrant Favourite: Salvias
Beloved for their long flowering and scented foliage, Salvias are essential for summer gardens. At Boma, you can explore varieties like 'Caradonna Pink Inspiration', 'Bright Rose', 'Cerro Potosi', ‘Blue Marvel', 'Mystic Spires', ‘Mirage Blue' and 'Hot Pink', They shine in sunny spots with good drainage and add colour from now well into autumn.
6: The Dazzling Diva: Dahlias
For showstopping impact, dahlias are your go-to. With endless shapes, colours, and forms, they steal the spotlight in summer borders. Discover Boma’s latest: 'Maggiore White', 'Starburst Pink' and 'Summer Red Bicolour', all perfect for a bold, dramatic focal point in your garden.
7: The Majestic Spire: Delphiniums
Nothing says elegance like the towering spires of Delphiniums. Their layered florets in blues, purples, and whites bring stature and splendour. Plant 'Galahad', 'Pacific Giant', 'Pure White', 'Excalibur white', 'Rose White Bee', 'Elatum', 'Dusky Maidens' for pure flower theatre.
Celebrate June Gardening at Boma Garden Centre…
We hope this guide has inspired you to make the most of your garden this June, from planting pollinator-friendly flowers and feeding your tomatoes, to simply enjoying the early summer blooms.
Remember: June is a time of colour and growth — and your garden deserves to thrive. Whatever you’re doing in the garden this June, Boma is here to help you grow with confidence.
Visit Boma Garden Centre in store to pick up all the June gardening supplies you could need, from vibrant bedding plants to essential tools and expert advice.
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June Gardening Tips Popular Questions
How do I choose the best bedding plants for June?
Choosing bedding plants in June is all about picking tender varieties that love the warmth, such as petunias, marigolds, and begonias. Look for healthy plants with bushy growth and no sign of weed seedlings in their pots. Make sure anything newly bought is well-watered and hardened off before planting.
What vegetable and salad crops are good for June?
June is ideal for harvesting broad beans and sugar snap peas, while also sowing fast-growing salad crops like lettuce, rocket, and radishes. It’s also a great time to plant out tender crops such as courgettes, sweetcorn, and runner beans. Keep on top of weed seedlings so your soft fruit and veg have space to thrive.
What are the best fruit trees for June?
June is a great time for harvesting early fruit or planting container-grown trees. Cherries, plums, and peaches may be ripening now, while apples, pears, and figs are busy developing their crops. You’ll also enjoy soft fruit like strawberries and raspberries at their sweetest.
