Soil & potting mix
Best soil for Mountain Germander (Teucrium montanum)
Also called Mountain Germander, Creeping Germander.
More about mountain germander
About Mountain Germander
Teucrium montanum · also called Mountain Germander, Creeping Germander · flowering
Teucrium montanum is a low, mat-forming evergreen subshrub native to calcareous rocky hillsides and limestone grasslands across central and southern Europe, from the Iberian Peninsula to the Balkans. It bears narrow, grey-green aromatic leaves and produces creamy-white to pale yellow flowers on short terminal heads from June to September, attracting bees and butterflies. Full sun and sharply drained, alkaline soil are essential; it excels in rock gardens and dry-stone wall crevices. The plant is mildly toxic if ingested due to diterpene compounds present throughout the Teucrium genus.
Preferred mix: Very well-drained, gritty, alkaline to neutral; calcareous or limestone-based soils are ideal
Watch for — Crown rot in wet winters: The primary threat; perfect drainage — ideally in a raised rock garden or scree bed — is the best preventive measure, as no amount of treatment reverses crown rot once established.
Why mountain germander needs this mix
Mountain Germander is a Mediterranean dry-hillside plant — it wants a lean, sharply drained, slightly alkaline mix, and rots fast in rich, water-holding soil.
- Mountain Germander 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 mountain germander 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 mountain germander — 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 mountain germander 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 mountain germander?
Mountain Germander 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 mountain germander, 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 mountain germander 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 mountain germander covers the timing and technique step by step.
Mountain Germander soil — frequently asked questions
What is the best soil mix for mountain germander?
2 parts standard peat-free compost or loam : 1 part coarse horticultural grit : 1 part perlite or coarse sand. Mountain Germander 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 mountain germander?
Rich, moisture-holding compost is the classic killer of mountain germander — especially over a cold, wet winter, when the base of the plant simply rots. Bagged "herb" or "Mediterranean" mixes are usually fine for mountain germander, but most standard composts need cutting hard with grit. The DIY ratio above is cheap and exactly right.
Does mountain germander need a special pH?
Mountain Germander 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 mountain germander?
Bagged "herb" or "Mediterranean" mixes are usually fine for mountain germander, 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 mountain germander?
A gritty mix barely breaks down, so mountain germander 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
- Mountain Germander care — the full brief (light, water, humidity, problems, pet safety)
- How often to water mountain germander — the schedule the mix feeds into
- Repotting mountain germander — 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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