Evergreen lavender comes into its own during the summer months when its stems are covered in flowers on elongated stems for weeks on end, giving off the most delightful fragrance when brushed against.
When to Prune Lavender
August is a great time of the year to remove those flower stalks, especially when you see the colour fading. It’s also the best time to prune the plant to help it retain its naturally mounded shape. Without an annual prune, it often becomes straggly, with lots of old, contorted wood on the elongated stems.
How to Prune Lavender Easily
An easy way to do this quickly is to gather all the stems in one hand and tie a length of twine around the base of all the stems. That way, you can cut all the stems in one go with a pair of sharp secateurs. The flower stems can then be used to make scented sachets or for drying and displaying indoors.
You’re then ready to prune the plant. Trim off small amounts, usually around 2.5 cm or 1 inch, shaping the plant as you make the cuts. Remove no more than half of the new growth to avoid damaging the plant.
Avoid Cutting into Old Wood
Just make sure you don’t cut into old wood, as the plant will seldom regenerate. You can tell the difference between old and new growth by looking at the stems. Old wood has stiff, brown stems. New growth has soft, light-coloured stems.
And that’s all there is to it. A simple job that keeps lavender looking its best for years to come.
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Frequently Asked Questions
1 – When is the best time to prune lavender in the UK?
The best time to prune lavender in the UK is in August, just after the flowers start to fade. This encourages bushy growth and helps maintain a tidy, compact shape.
2 – How much should I cut back lavender after flowering?
Cut back around 2.5 cm (1 inch) of new growth, removing no more than half. Avoid cutting into old wood, as lavender struggles to regrow from it.
3 – Can I cut lavender right down to the woody stems?
No, avoid cutting into the woody stems. Lavender does not regenerate well from old wood. Always trim lightly into the green, soft growth only.
4 – Why is my lavender plant getting woody and straggly?
Lavender becomes woody and leggy when it’s not pruned regularly. Annual pruning after flowering helps it keep a rounded, bushy shape and stay healthy.
5 – What can I do with lavender cuttings after pruning?
You can use lavender cuttings to make scented sachets, dried bouquets, or potpourri. Simply dry the flower heads in a cool, airy place for later use.
David Domoney is a Chartered Horticulturalist, Broadcaster, and Author. David has worked with a number of the UK’s leading garden retailers as a plant buyer and strategic consultant. With more than 30 years experience, in horticulture, David is as passionate about plants now as he was when he bought his first plant at a village fete.
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