June Garden Jobs: What to Cut, Feed and Tidy

Why June Is the Peak Month

June is the month when the garden is at its peak. Roses are flowering, perennials are blooming, lawns are growing fast, and weeds are germinating daily. It is also the month when the weather is finally warm enough to enjoy the garden in the evening. But June is not a month to sit back and admire. The garden needs regular attention to keep it looking good, and a week of neglect can lead to a month of recovery.

In the Chilterns, June typically sees 50 to 70mm of rain, but this can fall in a few heavy showers rather than steady rain. The chalky soils around High Wycombe, Amersham and Wendover drain fast, so plants can be drought-stressed within a week of dry weather. On clay soils in Aylesbury and Bicester, the soil holds moisture better, but surface watering is still needed for containers and new plantings.

Lawn Care in June

• Mow weekly with the blades at 25 to 40mm. Lower than 25mm weakens the grass in dry weather.
• Leave the clippings on the lawn in dry spells to retain moisture.
• Water the lawn in dry spells. 25mm per week is enough. Water deeply once a week, not lightly every day.
• Feed with a summer lawn fertiliser if the lawn is looking yellow.
• Treat weeds with a spot weedkiller rather than a blanket spray.
• Edge the lawn regularly for a crisp finish.

If the lawn goes brown in a drought, do not panic. Grass goes dormant and recovers when the rain returns. Watering a lawn through a drought uses 250 litres per 10 square metres per week, which is a lot of water. Consider letting it go dormant if you can.

Deadheading in June

Deadheading is the most important June job for flowering plants. Removing spent flowers encourages the plant to produce more, rather than putting energy into seed production.

• Roses: deadhead weekly to encourage repeat flowering. Cut back to a leaf with 5 leaflets.
• Perennials: deadhead delphiniums, lupins, hardy geraniums, salvia. Some will repeat flower.
• Annuals: deadhead cosmos, calendula, sweet peas. Sweet peas especially need daily deadheading.
• Containers and baskets: deadhead regularly to keep them flowering all summer.

Watering in June

June is the month when watering becomes a daily job for containers and new plantings. Established borders and lawns need less, but new plants need weekly watering at least.

• Water in the early morning or evening to reduce evaporation.
• Water deeply once a week rather than lightly every day. Deep watering encourages deep roots.
• Use a watering can for containers. Hosepipes waste water.
• Install a water butt to collect rainwater. Plants prefer rainwater to tap water.
• Group containers together to make watering easier.
• Use water-retaining gel in containers and baskets to reduce watering frequency.

Feeding in June

• Feed containers and hanging baskets weekly with a liquid tomato feed or a balanced fertiliser.
• Feed roses with a rose fertiliser after the first flush of flowers.
• Feed vegetables weekly with a high-potash feed once they start flowering.
• Do not feed shrubs and trees in summer. They do not need it and soft growth is vulnerable to drought.

Pruning in June

• Spring-flowering shrubs (forsythia, philadelphus, weigela): prune after flowering. Remove old wood to the ground.
• Evergreen shrubs: trim lightly to shape. Avoid hard pruning in summer.
• Cherry and plum trees: prune now to avoid silver leaf disease.
• Wisteria: shorten long whippy shoots to 5 to 6 leaves.
• Topiary: trim box and yew in late June for a crisp shape.

See our pruning guide for detail.

Weed Control in June

June weeds are tough. The small annual weeds of March have grown into large, flowering plants setting seed. Stay on top of them.

• Hoe annual weeds on dry days.
• Dig out perennial weeds (bindweed, couch grass). Get every bit of root.
• Mulch bare soil to suppress weed germination.
• Do not let weeds set seed. One chickweed plant can produce 10,000 seeds.

Pest and Disease Control in June

June is the peak month for pests and diseases. Aphids, slugs, snails, sawfly and blackspot are all active.

• Check roses for aphids and blackspot. Treat with insecticidal soap and a fungicide.
• Check lilies for lily beetle. Pick off the red adults and squish the larvae.
• Check box for box moth caterpillars. Pick off by hand or treat with a biological control.
• Check for slugs and snails after rain. Use organic slug pellets or beer traps.
• Check for sawfly on solomon's seal, geum, and berberis. Pick off by hand.

Planting in June

June is not the best planting month, but you can still plant if you water well.

• Plant out tender annuals and vegetables (dahlias, tomatoes, courgettes) after the last frost.
• Plant summer bedding in containers and baskets.
• Plant vegetable plug plants for late crops.
• Water new plantings daily for the first two weeks, then weekly.

Common June Mistakes

• Not watering new plants enough. New plants need daily watering for two weeks, then weekly for the rest of the summer.
• Not deadheading. Flowering plants stop flowering if you let them set seed.
• Cutting the lawn too short. Short grass is vulnerable to drought. Keep blades at 25 to 40mm.
• Watering at midday. Most of the water evaporates. Water in the morning or evening.
• Ignoring pests. A small aphid problem in June is a big problem in July. Act early.

Frequently Asked Questions

How often should I water my containers in June?

Daily in hot weather, every other day in mild weather. Hanging baskets may need watering twice a day in a heatwave.

Should I feed my lawn in June?

Only if it is looking yellow. A spring feed should last until mid-summer. Use a summer feed with low nitrogen if needed.

When should I prune my philadelphus?

Immediately after flowering, usually late June or early July. Remove the old flowering stems to the ground.

Get Help with June Garden Jobs

If you need help with June garden jobs in Oxfordshire, Buckinghamshire, Berkshire or Bedfordshire, send us a WhatsApp with photos and we will aim to respond within 12 to 36 hours, Monday to Sunday.

Further Reading

• March garden jobs in the Chilterns
• August garden jobs
• Pruning guide for UK shrubs

Sources and citations

This article draws on the following sources. Specific claims are cited inline where relevant.

1. CGM field records (2025-11. Site observations from gardens across Oxfordshire, Buckinghamshire, Berkshire and Bedfordshire.
2. Royal Horticultural Society (2024). RHS Gardening Advice and Plant Finder. Available at rhs.org.uk.
3. Met Office (2024). Regional climate averages, South East England. Available at metoffice.gov.uk.
4. British Geological Survey (2024). Soil parent material data for the Chilterns and Thames Valley. Available at bgs.ac.uk.