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Repotting guide

When & how to repot Lavender (Lavandula angustifolia)

Also called English lavender, true lavender, common lavender.

About Lavender

Lavandula angustifolia · also called English lavender, true lavender · flowering

Lavender is a Mediterranean evergreen subshrub grown for fragrant purple flower spikes and silvery foliage. English lavender (L. angustifolia) is the most cold-hardy; French and Spanish types are more tender. Sun and sharp drainage are non-negotiable. Pet-safe in typical garden quantities.

Lavandula angustifolia (English lavender) originates in the mountainous western Mediterranean (Pyrenees, French Alps); the 'English' name reflects cultivation, not origin.

Requires fast, perfectly drained neutral-to-alkaline soil and tolerates chalk; will not survive heavy clay or waterlogging (root rot).

Mature size: 50-80 cm tall and wide

Sources: rhs.org.uk, plants.ces.ncsu.edu, extension.colostate.edu

How to tell lavender needs repotting

Repotting on a calendar is less reliable than reading the plant. For lavender, watch for these signs:

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot lavender

Every 2–3 years; top-dress in the in-between years. Lavender's growth habit — woody evergreen subshrub — sets the pace. Lavender is a Mediterranean evergreen subshrub grown for fragrant purple flower spikes and silvery foliage. English lavender (L. angustifolia) is the most cold-hardy; French and Spanish types are more tender. Sun and sharp drainage are non-negotiable. Pet-safe in typical garden quantities.

What size pot to step lavender up to

Move up exactly one pot size. A heavy lavender dropped into a vastly bigger pot sits in a reservoir of wet soil its roots cannot reach, which rots them and destabilises the plant. In the years between repots, lift off and replace the top 3–5 cm of soil (top-dressing) instead — it refreshes nutrients without the shock of a full repot.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot lavender

Early spring, just as new growth restarts, is the ideal window for lavender. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting lavender

  1. Consider top-dressing first. If lavender is not badly root-bound, scrape off and replace the top 3–5 cm of soil instead — far less shock for a big plant that hates moving.
  2. Get help and one size up. For a full repot, choose a pot just one size larger. A heavy plant needs two people and a stable, free-draining pot.
  3. Ease it out on its side. Lay the plant down, slide the pot off, and gently loosen the outer roots. Do not bare-root a mature specimen.
  4. Repot at the same depth. Add fresh lean, free-draining alkaline soil beneath and around the rootball, keeping the original soil line. Firm it so the trunk is stable and upright.
  5. Water and leave it put. Water thoroughly, then leave lavender in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave lavender in exactly the same spot and light it was in before — moving and repotting at the same time is what makes a big specimen drop leaves. Water it in well, then let the top of the soil dry before watering again so the larger volume of fresh soil does not stay sodden. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for lavender

Lavender wants lean, free-draining alkaline soil. pH 6.7-7.5. Grit or sand cuts heavy soils; raised beds suit it. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting lavender — frequently asked questions

How often should you repot lavender?

Every 2–3 years; top-dress in the in-between years for lavender. Fully repot lavender only every 2–3 years; in the in-between years just top-dress the top 3–5 cm of soil. Step up one pot size in spring with lean, free-draining alkaline soil. It is heavy and hates being moved, and a vastly oversized pot holds water against the roots and rots them.

What size pot does lavender need?

Move up exactly one pot size. A heavy lavender dropped into a vastly bigger pot sits in a reservoir of wet soil its roots cannot reach, which rots them and destabilises the plant. In the years between repots, lift off and replace the top 3–5 cm of soil (top-dressing) instead — it refreshes nutrients without the shock of a full repot. Use our pot size calculator to size it from the plant's current pot and root spread.

When is the best time of year to repot lavender?

Early spring, just as new growth restarts, is the ideal window for lavender. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Should you top-dress or fully repot lavender?

For a big, heavy lavender, top-dressing — replacing the top 3–5 cm of soil — is the gentler option most years, with a full repot only every 2–3 years. A mature specimen sulks and drops leaves when fully repotted, so do it as rarely as the roots allow.

Should you fertilise lavender after repotting?

Not immediately. Wait about 4 weeks after repotting lavender. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.

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