July is a busy month in the garden, and with plants growing at full speed, it’s tempting to reach for the secateurs whenever something starts looking untidy.
But while some plants benefit from a summer trim, others can be seriously weakened—or lose next year’s flowers altogether—if they’re pruned at the wrong time.
Here’s what you should be cutting back this month, and what you’re better off leaving alone.
1. Yes, Prune Lavender After Flowering
If your English lavender has finished flowering, July is the ideal time to give it a light trim.
Cut back the faded flower stems and a little of this year’s soft green growth to keep the plant compact and encourage plenty of fresh shoots. Just be careful not to cut into the old, woody stems, as these rarely produce new growth.
Pruning now helps prevent lavender from becoming leggy and untidy over time.
2. Don’t Cut Back Hydrangeas Yet
Many gardeners assume fading hydrangea flowers should be removed immediately, but that’s often a mistake.
Most mophead and lacecap hydrangeas produce next year’s flower buds later in the season. Cutting stems back now could remove those developing buds and reduce next summer’s display.
If the flowers have browned, you can remove individual flower heads if you prefer, but leave the main stems until the appropriate pruning time for your hydrangea variety.
3. Deadhead Roses, But Don’t Cut Them Back Hard
July is an excellent time to deadhead repeat-flowering roses.
Removing spent blooms encourages many varieties to produce another flush of flowers later in the season. Cut back to the first healthy leaf with five leaflets beneath the faded bloom.
Avoid heavy pruning, however. Save major reshaping for the dormant season.
4. Trim Spring-Flowering Shrubs If You Haven’t Already
If spring-flowering shrubs such as forsythia, weigela or flowering currant have become overgrown and haven’t yet been pruned, don’t leave it much longer.
These shrubs produce next year’s flower buds later in summer. Delaying pruning until autumn or winter often means sacrificing next year’s blooms.
Remove a few of the oldest stems at the base and lightly shape the rest if needed.
5. Leave Tomatoes Alone—Mostly
Tomatoes don’t usually need pruning in the traditional sense, but cordon varieties do benefit from having side shoots removed regularly.
Pinch out these shoots while they’re small so the plant directs its energy into producing fruit rather than excess leafy growth.
Bush tomato varieties, however, should generally be left alone, as removing shoots can reduce your harvest.
6. Cut Back Early-Flowering Perennials
Some early-flowering perennials look tired by midsummer, but a light haircut can work wonders.
Hardy geraniums, lady’s mantle and catmint often respond by producing fresh foliage and, in some cases, a second flush of flowers later in the season.
Water plants well after pruning if the weather is dry.
7. Resist the Urge to Tidy Everything
Not every fading plant needs immediate attention.
Many flowers left to form seed heads provide food for birds later in the year, while taller stems offer shelter for beneficial insects. Plants such as teasels, echinacea and ornamental grasses continue adding texture and interest long after flowering has finished.
Sometimes the best pruning decision is not to prune at all.
A Simple July Pruning Checklist
Before making any cuts this month, remember these golden rules:
- Prune English lavender after flowering, avoiding old wood.
- Deadhead repeat-flowering roses regularly.
- Remove side shoots from cordon tomatoes only.
- Trim early-flowering perennials if they’ve become untidy.
- Finish pruning spring-flowering shrubs if needed.
- Avoid cutting back hydrangea stems in July.
- Leave attractive seed heads where possible for wildlife.
Taking a little extra care now can lead to healthier plants and better displays next year.
Final Thoughts
July isn’t about cutting everything back—it’s about knowing which plants will benefit from a trim and which ones should be left alone.
A few well-timed pruning jobs can encourage more flowers, healthier growth and tidier borders, while unnecessary cuts may reduce next year’s display. When in doubt, it’s often better to make a light trim than a heavy one, allowing your plants to continue growing naturally through the rest of the summer.
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