Repotting guide

When & how to repot Tenerife Lavender (Lavandula buchii)

Also called Tenerife lavender, Jagged lavender, Canary Island lavender.

More about tenerife lavender

About Tenerife Lavender

Lavandula buchii · also called Tenerife lavender, Jagged lavender · herb

Tenerife lavender is an evergreen woody subshrub endemic to the island of Tenerife in the Canary Islands, where it grows on dry, volcanic, rocky slopes and in open scrub. Its deeply pinnate or bipinnate, fern-like grey-green leaves give it a uniquely lacy appearance quite distinct from other lavenders, and it produces tall, branching stems of pale violet-blue flowers over a long season, often near-continuously in mild climates. Being native to a warm subtropical island, it is one of the least frost-hardy lavenders and requires a frost-free or near-frost-free environment to overwinter successfully outdoors in most temperate gardens. According to the ASPCA, lavender (Lavandula) is toxic to cats, dogs, and horses.

Mature size: 60 cm–1 m tall and 90 cm–1.2 m wide in favourable frost-free conditions.

Watch for — Root rot (from overwatering or winter wet): Sitting in moist or waterlogged soil — especially in cool temperatures — rapidly induces root and crown rot. This is the most common cause of plant failure; ensure perfect drainage and drastically reduce watering from October to March.

How to tell tenerife lavender needs repotting

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

Roots creeping out of the drainage holes or matting tightly across the soil surface.
The rootball dries out within a day or two no matter how much you water.
Water channels straight down the gap between rootball and pot without wetting the centre.
Steady decline — thin growth, persistent crispy edges — that good humidity and watering have not fixed. Only then is the disturbance of a repot worth the risk for tenerife lavender.

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 tenerife lavender

Every 1–2 years, disturbing the roots as little as possible. Tenerife Lavender's growth habit — upright, bushy evergreen subshrub with highly divided, fern-like grey-green pinnate leaves and tall, branching flower spikes. — sets the pace. Tenerife lavender is an evergreen woody subshrub endemic to the island of Tenerife in the Canary Islands, where it grows on dry, volcanic, rocky slopes and in open scrub. Its deeply pinnate or bipinnate, fern-like grey-green leaves give it a uniquely lacy appearance quite distinct from other lavenders, and it produces tall, branching stems of pale violet-blue flowers over a long season, often near-continuously in mild climates. Being native to a warm subtropical island, it is one of the least frost-hardy lavenders and requires a frost-free or near-frost-free environment to overwinter successfully outdoors in most temperate gardens. According to the ASPCA, lavender (Lavandula) is toxic to cats, dogs, and horses.

What size pot to step tenerife lavender up to

Go up only one size and handle the rootball as little as possible. Tenerife Lavender resents root disturbance, so the goal is to slide the intact rootball into slightly more soil — not to tease, wash or prune the roots. A modest step up means less shock and a faster recovery.

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 tenerife lavender

Early spring, just as new growth restarts, is the ideal window for tenerife 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 tenerife lavender

Keep disturbance to a minimum. Tenerife Lavender resents root disturbance, so the plan is to move the intact rootball — not to wash, tease or prune the roots.
Choose just one size up. Pick a pot only one size larger with drainage, and have moisture-retentive sharply drained, sandy or gritty, low-fertility ready.
Slide the rootball out whole. Water the day before, then ease tenerife lavender out keeping the rootball intact. Gently free only the roots that are circling the very bottom.
Nestle it into fresh soil. Add a base layer of fresh mix, set the rootball in at the same depth, and backfill gently around the sides without packing hard.
Water and protect. Water in, then keep it warm, humid and out of direct sun for a few weeks while it re-roots. Expect a short sulk — that is normal.

Aftercare

Expect tenerife lavender to sulk for a couple of weeks — that is normal after any root disturbance for this group. Keep it warm, humid and out of direct sun, water just enough to keep the mix lightly moist, and do not panic and overwater while it re-roots. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for tenerife lavender

Tenerife Lavender wants sharply drained, sandy or gritty, low-fertility. Mimics its volcanic island homeland with free-draining, low-nutrient soil; a potting mix of 50% loam-based compost and 50% horticultural grit works well in containers. Waterlogged soil causes rapid crown and root rot. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting tenerife lavender — frequently asked questions

How often should you repot tenerife lavender?

Every 1–2 years, disturbing the roots as little as possible for tenerife lavender. Repot tenerife lavender every 1–2 years, disturbing the roots as little as possible — it sulks for weeks if the rootball is teased apart. Slide it into one size up in spring with fresh sharply drained, sandy or gritty, low-fertility, keep it warm and humid afterwards, and never bare-root or hard-prune the roots.

What size pot does tenerife lavender need?

When is the best time of year to repot tenerife lavender?

Why does tenerife lavender sulk after repotting?

Tenerife Lavender resents root disturbance, so a wilt or stall for a week or two after repotting is normal, not a failure. Minimise it by keeping the rootball intact, stepping up just one size, and keeping the plant warm, humid and out of direct sun while it re-roots.

Should you fertilise tenerife lavender after repotting?

Not immediately. Wait about 4 weeks after repotting tenerife 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.