Lavender is one of the UK’s most loved garden plants, prized for its fragrant flowers, silver-green foliage and ability to attract bees and butterflies. But to keep your lavender looking neat, healthy and full of blooms year after year, regular pruning is essential.
If you’ve ever wondered how to prune lavender, when to prune lavender, or whether you’ve cut it back too far, this guide covers everything you need to know.
Whether you grow lavender in borders, containers, or cottage gardens, these simple pruning tips will help your plants thrive.
Why is it important to prune lavender?
Many gardeners are nervous about cutting back lavender, but leaving it unpruned can actually shorten its lifespan.
Regular pruning helps:
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Encourage bushier, healthier growth
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Produce more flowers the following year
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Prevent plants becoming woody and leggy
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Improve airflow through the plant
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Maintain a neat compact shape
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Reduce the chance of stems splitting in winter weather
Without annual pruning, lavender often becomes sparse in the centre and develops thick woody stems that rarely produce new growth.
When should you prune lavender?
One of the most common questions is:
When is the best time to prune lavender?
The answer depends on the time of year.
Light summer prune (July to August)
Once your lavender has finished flowering, trim off the spent flower stems and lightly shape the plant.
This keeps it looking tidy and encourages fresh foliage before autumn.
Main Prune (late August to early September)
The best time for a more thorough prune is in late summer while the weather is still mild.
This allows the plant time to recover before winter arrives.
Avoid pruning too late in autumn, as fresh growth may be damaged by frost.
Should you prune lavender in spring?
Many gardeners wait until spring, but heavy spring pruning isn’t usually recommended:
In spring you should simply:
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Remove any winter damage
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Cut away dead stems
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Lightly reshape if needed
The main structural prune is best carried out after flowering.
How to prune lavender properly
Pruning lavender is easier than many people think.
Follow these simple steps
Step 1: Wait until flowering has finished
Allow the flowers to fade before reaching for the secateurs.
The flowers can even be harvested for drying before pruning.
Step 2: Remove flower stems
Cut off all faded flower spikes.
This instantly tidies the plant.
Step 3: Shape the plant
Trim around the outside of the plant to maintain a rounded, dome like shape.
Keeping this shape helps rainwater run off the plant and reduces winter damage.
Step 4: Never cut into old woody stems
This is the golden rule when pruning lavender.
Only trim the leafy green growth.
Lavender struggles to produce new shoots from old woody stems, and cutting into them can permanently damage the plant.
Aim to remove around one third of the current season's soft growth.
How far back should you cut lavender?
A good rule of thumb is to remove approximately one third of the green growth while leaving plenty of leafy stems behind.
You should avoid cutting:
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Thick brown stems
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Bare woody branches
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Sections with no visible leaves
If in doubt, prune less rather than more.
Can you revive woody lavender?
Older lavender plants often become woody at the base.
Unfortunately, once lavender has become heavily woody, it rarely returns to its original compact shape.
You can try:
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Light annual pruning
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Removing dead branches
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Feeding in spring
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Improving drainage
If the plant is very old and produces few flowers, replacing it may be the best option.
Regular pruning each year prevents plants becoming woody in the first place.
How to prune different types of lavender
Although lavender varieties are pruned in the same way, some benefit from slightly different timing.
English Lavender (Lavandula agustifolia)
The most common garden variety.
Prune after flowering in late summer.
French lavender (Lavandula stoechas)
French lavender often flowers earlier and may produce several flushes throughout the season.
Deadhead regularly and trim after each flowering period.
Lavandin Hybrids
These larger varieties can be pruned after flowering but avoid cutting into woody growth
What tools do you need to prune lavender?
Using clean, sharp tools makes pruning easier and reduces the risk of disease.
Useful tools include:
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Sharp secateurs
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Gardening gloves
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Garden trug or basket for clippings
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Hand shears for larger lavender hedges
Cleaning blades between plants also helps prevent the spread of disease.
What should you do after pruning lavender?
Once you have finished pruning:
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Water if conditions are particularly dry
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Remove fallen stems and leaves
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Check drainage around the plant
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Avoid heavy feeding late in the season
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Apply a light layer of gravel around the base to improve drainage if needed
Lavender prefers poor, free draining soil, so avoid rich composts around established plants.
Don’t let your freshly pruned lavender go to waste! The fragrant stems can be used in a variety of ways around the home and garden, helping you make the most of your harvest.
Take lavender cuttings
If you lavender is healthy, late summer is an excellent time to take lavender cutting and grow new plants for free.
How to propagate lavender:
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Choose healthy, non flowering shoots around 10cm long
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Remove the lower leaves from each cutting
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Dip the end in a rooting hormone (optional)
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Plant is a pot filled with free draining compost mixed with grit
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Keep the compost lightly moist and place in a bright sheltered spot.
Dry lavender for beautiful displays
One of the easiest ways to enjoy lavender long after summer is to dry lavender flowers.
Simply gather a small bunch of freshly cut stems, tie them together with string and hang them upside down in a warm, dry, well ventilated room away from direct sunlight. After two to four weeks, the flowers will be fully dried and retain much of their fragrance.
Dried lavender can be displayed in vases, wreaths, or rustic bouquets to add colour and scent to your home.
Make lavender sachets
Fill small fabric bags with dried lavender buds to create natural scented sachets.
They’re perfect for:
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Freshening wardrobes and drawers
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Scenting linen cupboards
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Adding fragrance to suitcases
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Naturally deterring months
These also make thoughtful homemade gifts.
Attract wildlife next season
If you don't need all of the stems, compost the soft green clipping or leave a small amount of seedheads for wildlife. Lavender is one of the best plants for bees and other pollinators, so caring for it properly now will reward you with plenty of insect friendly flowers next summer.
Common lavender pruning mistakes
Avoid these common errors:
Pruning too late
Late autumn pruning can encourage tender new growth that is easily damaged by frost.
Cutting into woody growth
Lavender rarely regrows from old wood
Not pruning at all
Skipping annual pruning leads to leggy, untidy plants with fewer flowers
Overwatering
Lavender dislikes sitting in wet soil, particularly after pruning.
How to keep lavender healthy all year
Pruning is just one part of lavender care.
For the healthiest plants:
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Plant in full sun
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Choose well drained soil
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Avoid overwatering
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Deadhead throughout summer
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Prune every year
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Protect young plants from waterlogged winter conditions
Healthy lavender rewards you with fragrant flowers, pollinator-friendly blooms, and evergreen foliage for many years.
Recommended products for lavender care
To help your lavender stay healthy, consider using:
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Sharp secateurs for clean pruning cuts
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Horticultural grit to improve drainage
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Decorative gravel for mulching
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Watering can for newly planted lavender
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Garden gloves for comfortable pruning
Frequently asked questions
Can I cut lavender back hard?
Only if there is still leafy green growth remaining. Avoid cutting into old woody stems.
What month do you prune lavender?
The main prune is usually best carried out in August or early September, after flowering has finished.
Will lavender grow back if I cut it too short?
If you’ve cut into woody stems with no leaves, lavender may struggle to recover.
Can I prune lavender in winter?
It is best not to. Wait until after flowering is late summer or carry out only light tidying in spring.
Should I deadhead lavender?
Yes. Removing spent flowers throughout summer keeps plants tidy and can encourage additional blooms on some varieties.
Knowing how to prune lavender is one of the easiest ways to keep your garden looking beautiful year after year. A quick annual trim encourages stronger growth, more flowers and a healthier, longer lasting plant.
Remember the golden rule: only cut the soft green growth and never into old woody stems. With the right timing and technique, your lavender will reward you with fragrant blooms, vibrant colour and plenty of pollinator friendly flowers every summer.