Last Updated: 03 August, 2026 | Written by Sarah Mitchell, Content Writer, DiscountStars
August is peak garden season in the UK — but it’s also the month things can quietly get away from you. Between summer holidays, warm spells, and the first hints of autumn creeping in by month’s end, your garden needs a bit of attention to stay looking its best and set up well for the seasons ahead.
Below is a complete, practical August garden checklist based on standard RHS-aligned seasonal gardening guidance for the UK climate, plus current discount codes for two brands we recommend if you need supplies.
1. Deadhead and Keep Flowers Blooming
Deadheading spent blooms is the single easiest way to keep your borders and hanging baskets flowering right through to September. Roses, dahlias, and bedding plants like petunias will all reward a weekly deadheading session with fresh growth. Don’t forget to give your pots and baskets a liquid feed every couple of weeks — August heat drains nutrients fast.
2. Water Smart, Not Just Often
With hosepipe bans a regular feature of UK summers, it pays to water efficiently rather than frequently. Water early morning or evening to reduce evaporation, and focus on the base of plants rather than leaves. A water butt is one of the best investments you can make this time of year — and it’s worth checking Garden Sanctuary for water-saving accessories and planters designed to hold moisture longer. Use code EXTRA12 at checkout for a discount, verified live on DiscountStars as of 3 August 2026.
3. Trim Hedges and Prune Summer-Flowering Shrubs
August is the ideal window to trim hedges before birds start nesting again next spring, and to prune shrubs like wisteria and rambling roses once they’ve finished flowering. A sharp, well-maintained pair of shears makes this job far less of a chore — blunt tools tear rather than cut, which stresses the plant.
4. Harvest Regularly
If you’re growing vegetables, August is harvest central: courgettes, tomatoes, beans, and salad leaves all need picking regularly to keep production going. The more you pick, the more the plant produces — leaving fruit and veg on too long signals the plant to stop.
5. Keep the Lawn Healthy Through Heat Stress
Lawns often go brown in August heat — and that’s normal, not necessarily a sign of damage. Raise your mower blade height to reduce stress on the grass, and avoid mowing during the hottest part of the day. If patches look genuinely bare going into September, that’s your cue to start planning autumn lawn repair.
6. Check and Maintain Garden Structures
With decking, fences, and sheds getting heavy use over summer, August is a good time for a maintenance check — loose panels, sun-faded wood, or a shed roof that’s due a re-felt are all easier to sort now than in the wet months ahead. If you’ve been putting off getting a proper storage solution, Buy Sheds Direct is worth a look for a wide range of sheds and outdoor storage at competitive prices. Use code SHEDSAVE7 at checkout — verified live on DiscountStars as of 3 August 2026 — to bring the cost down further before autumn arrives.
7. Plan and Plant for Autumn
Towards the end of August, start planting autumn bulbs like crocuses and daffodils for a spring display, and consider sowing quick-growing crops like spinach or spring cabbage. This is also the time to order any new garden furniture, storage, or structures you want in place before the weather turns — retailers often run late-summer clearance offers to shift stock before autumn ranges land.
8. Tidy Up Garden Furniture and Outdoor Spaces
Give patio furniture, cushions, and outdoor rugs a proper clean while the weather’s still good — mildew sets in fast once the damp autumn air arrives. It’s also a good moment to assess whether your current setup needs replacing before next summer, when demand (and prices) climb again.
Quick August Garden Checklist
- Deadhead flowers weekly
- Water early morning or evening
- Trim hedges and prune summer shrubs
- Harvest fruit and veg regularly
- Raise mower height for heat-stressed lawns
- Check sheds, fences, and decking for damage
- Plant autumn bulbs and quick-growing crops
- Clean and store/cover garden furniture
Save While You Get Your Garden Ready
Whether you’re stocking up on planters and water-saving accessories from Garden Sanctuary, or finally getting that new shed sorted through Buy Sheds Direct, don’t pay full price:
Brand | Code | What it’s for |
Garden Sanctuary | EXTRA12 | Planters & water-saving accessories |
| Buy Sheds Direct | SHEDSAVE7 | Sheds & outdoor storage |
Codes verified live on DiscountStars as of 3 August 2026 — check our live discount code page for current expiry dates, as retailer codes can change without notice.
Frequently Asked Questions
What should I do in my garden in August in the UK?
Focus on deadheading flowers, watering efficiently during heat, trimming hedges and summer-flowering shrubs, harvesting fruit and veg regularly, and starting to plan autumn planting.
Is it too late to prune in August?
No — August is actually the recommended time to prune many summer-flowering shrubs (like wisteria and rambling roses) once flowering has finished, and to trim hedges before birds begin nesting again in early spring.
Why does my lawn go brown in August?
Brown patches are usually heat stress, not permanent damage. UK lawns typically recover once cooler, wetter weather returns in autumn. Raising your mower blade height and avoiding midday mowing helps reduce stress.
When should I start planting for autumn?
Late August is a good time to plant autumn bulbs (crocuses, daffodils) and sow quick-growing crops like spinach or spring cabbage.
Should I feed my garden in August?
Yes — plants in pots, hanging baskets, and containers benefit from a liquid feed every couple of weeks during August, since regular watering washes nutrients out of the soil faster than usual. Established border plants and shrubs generally don’t need extra feeding this late in the season.
Is August a good time to plant new shrubs or trees?
It’s best avoided if possible. August heat and dry soil put newly planted shrubs and trees under stress before their roots have established. Autumn (September–November) is the better window for planting, once the soil cools and rainfall picks up — if you do plant in August, water deeply and regularly until roots take hold.
How often should I mow my lawn in August?
Once a week is usually enough during August, and less often during hot, dry spells when growth slows. Mowing too short or too frequently in the heat adds unnecessary stress — raise the blade height and let the lawn grow slightly longer than you would in spring.
What vegetables can I still sow in August in the UK?
There’s still time for quick-growing crops like salad leaves, radishes, spring onions, and spinach. Towards the end of the month you can also sow spring cabbage and winter lettuce for a later harvest, making the most of the remaining warmth before autumn.
How do I protect my garden during a heatwave?
Water container plants and new additions in the early morning or evening, add a layer of mulch to borders to lock in soil moisture, and move especially vulnerable pots into partial shade during the hottest part of the day. Established plants are generally more resilient than newly planted ones.
Do I need to worry about garden pests in August?
Warm weather brings increased aphid, slug, and vine weevil activity, so it’s worth checking new growth and containers regularly. Removing affected leaves promptly and encouraging natural predators like ladybirds usually keeps things under control without needing chemical treatments.
Editorial note: This guide reflects general UK gardening best practice for August and is reviewed periodically for seasonal accuracy. Discount codes are checked regularly, but always confirm the code is live at checkout.
Reviewed by: James Whitfield, Senior Editor at DiscountStars — last checked for accuracy on 03 August, 2026.
