Soil & potting mix
Best soil for Broad-Leaved Lavender (Lavandula latifolia)
Also called Broad-leaved lavender, Spike lavender, Portuguese lavender.
More about broad-leaved lavender
About Broad-Leaved Lavender
Lavandula latifolia · also called Broad-leaved lavender, Spike lavender · herb
A wild Mediterranean species closely related to English lavender but with noticeably broader, grey-green leaves and branched flowering stems bearing multiple flower spikes — a distinguishing feature from the single-stemmed English lavender. It is widely cultivated for its camphor-rich essential oil, which is produced in far greater quantity than from L. angustifolia, though with a coarser scent profile. Full sun and excellent drainage are the key requirements; it is moderately hardy and may need protection in colder parts of its USDA range. Lavender is toxic to cats, dogs, and horses according to the ASPCA.
Preferred mix: Well-drained, alkaline to neutral loam or sandy soil, pH 6.5–8.0
Watch for — Winter dieback in cold-wet soils: The combination of cold and waterlogged soil causes crown rot; plant on a slope or raised bed and mulch with gravel around the crown rather than organic matter.
Why broad-leaved lavender needs this mix
Broad-Leaved Lavender is a Mediterranean dry-hillside plant — it wants a lean, sharply drained, slightly alkaline mix, and rots fast in rich, water-holding soil.
- Broad-Leaved Lavender evolved on stony, sun-baked slopes — its roots expect to dry out hard and quickly between rains, so the mix must drain almost as fast as you pour.
- A lean, low-nutrient mix keeps growth firm and aromatic; a rich one gives soft, sappy, flavourless growth that flops and rots.
- It tolerates and often prefers a slightly alkaline soil, the opposite of most houseplants.
For the full picture on what makes up a good mix, see our guide to the main types of soil and potting media — it explains why each ingredient above behaves the way it does.
What goes wrong with the wrong mix
The wrong soil is one of the most common reasons broad-leaved lavender struggles, and the damage often shows up weeks later as a watering problem. For this species specifically:
- Rich, moisture-holding compost is the classic killer of broad-leaved lavender — especially over a cold, wet winter, when the base of the plant simply rots.
- A peaty, acidic potting mix is doubly wrong: too wet and the wrong pH direction.
- No grit means the rootball stays damp for days, which a dry-climate root system never copes with.
Growing broad-leaved lavender in ordinary rich, moisture-retentive compost. Lean it out with at least a third grit, and never let it sit wet over winter.
pH — does it matter for broad-leaved lavender?
Broad-Leaved Lavender likes neutral to slightly alkaline soil, roughly pH 6.5-7.5. If your soil or compost is acidic, a little garden lime or extra grit nudges it the right way — the one common plant where you may add lime.
If you want to check or adjust it, the soil pH guide walks through testing and the safe ways to nudge a mix more acidic or more alkaline.
DIY mix vs a bagged one
Bagged "herb" or "Mediterranean" mixes are usually fine for broad-leaved lavender, but most standard composts need cutting hard with grit. The DIY ratio above is cheap and exactly right.
Drainage and the pot
Sharp drainage is everything: a terracotta pot with a big hole, gritty mix and never a saucer left full. Raised beds suit these herbs outdoors for the same reason.
A gritty mix barely breaks down, so broad-leaved lavender needs little repotting — refresh the top layer and the grit every couple of years rather than potting on aggressively. When the time comes, our repotting guide for broad-leaved lavender covers the timing and technique step by step.
Broad-Leaved Lavender soil — frequently asked questions
What is the best soil mix for broad-leaved lavender?
2 parts standard peat-free compost or loam : 1 part coarse horticultural grit : 1 part perlite or coarse sand. Broad-Leaved Lavender evolved on stony, sun-baked slopes — its roots expect to dry out hard and quickly between rains, so the mix must drain almost as fast as you pour.
Can I use normal potting soil for broad-leaved lavender?
Rich, moisture-holding compost is the classic killer of broad-leaved lavender — especially over a cold, wet winter, when the base of the plant simply rots. Bagged "herb" or "Mediterranean" mixes are usually fine for broad-leaved lavender, but most standard composts need cutting hard with grit. The DIY ratio above is cheap and exactly right.
Does broad-leaved lavender need a special pH?
Broad-Leaved Lavender likes neutral to slightly alkaline soil, roughly pH 6.5-7.5. If your soil or compost is acidic, a little garden lime or extra grit nudges it the right way — the one common plant where you may add lime.
Should I buy a bagged mix or make my own for broad-leaved lavender?
Bagged "herb" or "Mediterranean" mixes are usually fine for broad-leaved lavender, but most standard composts need cutting hard with grit. The DIY ratio above is cheap and exactly right.
How often should I refresh the soil for broad-leaved lavender?
A gritty mix barely breaks down, so broad-leaved lavender needs little repotting — refresh the top layer and the grit every couple of years rather than potting on aggressively. Sharp drainage is everything: a terracotta pot with a big hole, gritty mix and never a saucer left full. Raised beds suit these herbs outdoors for the same reason.
Keep reading
- Broad-Leaved Lavender care — the full brief (light, water, humidity, problems, pet safety)
- How often to water broad-leaved lavender — the schedule the mix feeds into
- Repotting broad-leaved lavender — when and how to refresh the mix
- Soil pH guide — test it and adjust it safely
- Overwatered plant — signs and recovery
- Root rot — how the wrong soil starts it, and how to save the plant
- Should I water my plant? The simple check first
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- All 10153 soil and potting-mix guides in the Growli library