Why Lavender Earns Its Place in a British Garden

Few plants work as hard as lavender. It gives you scent from June onwards, grey-green foliage that looks good even in winter, and a haze of purple that bees adore. It suits gravel gardens, cottage borders, herb beds and pots by the back door. Plant it along a path and every brush past releases that unmistakable smell.

The catch is that lavender is a Mediterranean plant that dislikes the one thing Britain has plenty of: wet, heavy soil in winter. Get the drainage right and it will live for a decade or more. Get it wrong and plants sulk, go woody and die in their second winter. Everything below comes back to that single point.

Choosing the Right Lavender for Your Garden

Not all lavenders are equally hardy, and the labels rarely make this clear.

• English lavender (Lavandula angustifolia) — the toughest choice for most of the UK. Compact varieties such as 'Hidcote' and 'Munstead' reach 45–60cm, flower from late June and cope with frost. Best for borders and hedging.
• Lavandin (Lavandula x intermedia) — larger, later flowering, with long stems that are superb for drying. 'Grosso' and 'Provence' are the classic picks, but they are slightly less hardy, so give them a sheltered spot in colder counties.
• French and Spanish lavender (Lavandula stoechas and its relatives) — those distinctive "bunny ear" flowers. Wonderful in pots, but treat them as borderline hardy and bring them under cover for winter.

If you garden on clay, in a frost pocket, or above the Midlands, stick to English lavender. It will repay you.

Planting: Sunshine, Grit and a Mound

Lavender wants at least six hours of direct sun a day and soil that drains within an hour of heavy rain. Before planting, dig in plenty of horticultural grit — two or three handfuls per plant into the planting hole is not too much. Do not add rich compost or manure; lavender flowers best on lean ground, and too much fertility produces soft, floppy growth that rots in damp weather.

Plant on a slight mound so water runs away from the crown, and set plants 30–45cm apart for a border, closer for a low hedge. Water them in well, then water regularly through their first summer while roots establish. After that, rainfall is usually enough.

If your soil is stubbornly heavy, build a raised bed 20cm high filled with a mix of topsoil, grit and sharp sand. It is the single best investment you can make for lavender, rosemary and thyme.

Looking After Lavender Through the Year

Once established, lavender needs very little from you.

• Watering: only during long dry spells in the first two years. Mature plants are drought tolerant.
• Feeding: none, or a light sprinkle of general-purpose feed in early spring on poor ground. Avoid high-nitrogen feeds entirely.
• Weeding: keep the ground around the base clear so air moves freely around the crown.
• Winter: wet kills more lavender than cold. Improve drainage, avoid mulch piled against the stems, and move pots under cover or against a south-facing wall.

How and When to Trim Lavender

This is the job that separates a shapely plant from a woody, sprawling mess. Trim immediately after flowering, usually late August to early September in most of Britain, once the bees have finished with the flowers.

Using sharp shears or secateurs, cut back the flower stems plus about 2.5cm of the current year's leafy growth. You want to remove the soft green material, not the brown, bare wood below it. Never cut into old wood — lavender rarely regrows from leafless stems, and a hard cut into the base can kill the plant outright.

Two useful habits: gather the clippings into bunches, tie them with string and hang them upside down in a dark, airy room for dried flowers. And in April, give plants a light tidy-up, trimming just the tips of the shoots to neaten the shape without removing flower buds. If a plant has become bare and leggy, take cuttings from the healthy growth in late summer, or replace it — a three-year-old cutting will soon outgrow a tired old shrub.

Lavender in Pots and Gravel

Containers suit lavender beautifully, provided the compost is gritty. Use a loam-based mix with 30 per cent horticultural grit by volume, plant in terracotta rather than plastic so roots can breathe, and raise the pot on feet so water never sits underneath. Repot every three or four years.

In the ground, lavender looks superb combined with ornamental grasses, sedum, rosemary and silver-leaved plants such as stachys. In a gravel garden it will seed about gently and knit into the planting. Whichever way you grow it, sunshine, sharp drainage and an annual trim are all it asks in return — and it will reward you with scent for years.