Cat Thyme (Kitty Crack) care

Light

Aim for at least 4-6 hours of direct sun on the leaves. Needs full sun in a warm, sheltered, south- or west-facing position; it will not flower well or thrive in shade. If your only bright window faces south, that's perfect for cat thyme — same window any aroid would fry on.

Watering

Watering cat thyme: water sparingly; allow soil to dry between waterings. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Drought-tolerant once established; overwatering and waterlogged soil are the most common causes of failure — err on the side of too dry rather than too wet.

Soil and pot

Cat Thyme grows best in well-drained chalk, loam, or sand; neutral to alkaline ph. Good drainage is non-negotiable; add grit liberally when planting in heavier soils and avoid any site that holds moisture in winter. 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

Cat Thyme sits happiest at around Low humidity and -5 to 30°C (23 to 86°F). Prefers the dry conditions of its Mediterranean homeland; high humidity combined with poor airflow encourages fungal issues at the stem base. 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 cat thyme sparingly. Apply a balanced, low-nitrogen feed once in spring; excess feeding produces lush, weak growth prone to winter damage. 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 cat thyme in the Growli community. Each is annotated with the most common cause so you know where to start.

• Root rot from winter wet — The most frequent killer; ensure the planting site has near-perfect drainage and consider a grit mulch around the collar to divert standing water.
• Frost damage to stems — Rated RHS H3, so plants in cold inland gardens can lose stems in hard frosts; avoid cutting back until new growth appears in spring to confirm what has survived.

Propagation

Take softwood cuttings in early summer or semi-ripe cuttings in midsummer; alternatively sow seed in spring in a cold frame at 15–18°C. 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

Cat Thyme is mildly toxic to pets. Contains neoclerodane diterpenes (including teucrin A) that are hepatotoxic; the RHS states the plant is harmful if eaten and recommends protective gloves when handling. Not listed as non-toxic by the ASPCA. The cat-attractant scent is not a safety endorsement — ingestion should be discouraged. 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.

Cat Thyme deep-dive guides

Every aspect of cat thyme care, each with its own calibrated guide:

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

Featured in these plant shortlists

Cat Thyme qualifies for 1 curated Growli shortlist — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• 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

Cat Thyme is also known as Cat Thyme, Kitty Crack, Mediterranean Germander, and Cat Crack.

• Wild Thyme care — light, water and common problems
• Jurisic's Sage care — light, water and common problems
• Spanish Sage care — light, water and common problems
• All 10153 plant care guides in the Growli library