Mountain Germander (Creeping Germander) care

Light

Mountain Germander needs sun on the leaves, not just bright ambient room light. Requires full sun to flower well; in partial shade it becomes sprawling and flowers poorly — ideally planted on a sunny, south-facing rock garden slope. A south or west-facing windowsill in the northern hemisphere is the default; anywhere else, expect the plant to stretch and pale out within a season.

Watering

Water mountain germander rarely once established; water during dry spells in the first season. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Naturally adapted to dry, rocky habitats; excess moisture, especially in winter, is more damaging than drought once roots are established.

Soil and pot

Mountain Germander grows best in very well-drained, gritty, alkaline to neutral; calcareous or limestone-based soils are ideal. Thrives in poor, lean soils — adding grit or limestone chippings improves drainage and mimics its native rocky habitat. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Mountain Germander sits happiest at around Low humidity and -20 to 28°C (-4 to 82°F). Naturally grows in exposed, dry, mountain conditions; high humidity combined with stagnant air encourages stem-base fungal rots. If you keep the room above year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed mountain germander sparingly. No regular feeding necessary; apply a very light topdressing of grit and a balanced slow-release fertiliser in spring if growth appears weak. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on mountain germander in the Growli community. Each is annotated with the most common cause so you know where to start.

• 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.
• Slugs on young plants — Newly planted specimens are vulnerable to slug damage in spring; apply grit mulch around the crown, which deters slugs and improves drainage simultaneously.

Propagation

Sow seed in autumn or spring in gritty compost in a cold frame; take semi-ripe cuttings in summer, or divide established mats carefully in early spring. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Mountain Germander is mildly toxic to pets. The Teucrium genus contains neoclerodane diterpenes (teucrin A and related compounds) with documented hepatotoxic potential; T. montanum is not listed as non-toxic by the ASPCA. Ingestion by pets or people should be avoided. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Mountain Germander deep-dive guides

Every aspect of mountain germander care, each with its own calibrated guide:

• Common mountain germander problems & fixes
• Mountain Germander watering schedule
• Mountain Germander light requirements
• Best soil mix for mountain germander
• Mountain Germander fertilizing guide
• When to repot mountain germander
• How to propagate mountain germander
• How to prune mountain germander
• What's eating my mountain germander?
• Mountain Germander growth rate & size
• Mountain Germander cold hardiness
• Mountain Germander temperature & humidity
• Is mountain germander toxic to cats & dogs?
• Is mountain germander toxic to cats?
• Is mountain germander toxic to dogs?
• All 14 Teucrium varieties
• Getting mountain germander to bloom

Featured in these plant shortlists

Mountain Germander qualifies for 6 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Best small & tabletop houseplants — Compact houseplants that stay under about 40 cm — desk, shelf and windowsill plants that never outgrow a small space.
• Best houseplants for full sun — Houseplants that want direct sun — the species for a hot south or west-facing windowsill where shade-lovers scorch.
• Best houseplants for a cool room — Houseplants that tolerate cool conditions down to about 10°C — for an unheated spare room, hallway, porch or a home kept cool.
• Best fragrant houseplants — Indoor plants with scented flowers or aromatic foliage — greenery you can smell, selected from our care library.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Mountain Germander is also commonly called Mountain Germander or Creeping Germander.

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