Lavender care

Light

Aim for at least 4-6 hours of direct sun on the leaves. 6+ hours of direct sun for strong flowering and oil content. If your only bright window faces south, that's perfect for lavender — same window any aroid would fry on.

Watering

Watering lavender: when the top of the soil is dry, every 10-14 days. 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. Established plants rarely need irrigation outside of severe drought.

Soil and pot

Lavender grows best in lean, free-draining alkaline soil. pH 6.7-7.5. Grit or sand cuts heavy soils; raised beds suit it. 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

Lavender sits happiest at around 30-50% (outdoor) humidity and 13-27°C (55-80°F). Prefers dry air; humid summers encourage fungal disease. If you keep the room above 13 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 lavender sparingly. Almost none; lean soil produces strong scent. A spring top-dress with compost is plenty. 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 lavender in the Growli community. Each is annotated with the most common cause so you know where to start.

• Woody bare base — Hard pruning into old wood does not regrow — replace every 5-7 years.
• Browning after winter — Wet feet; lavender hates winter wet more than cold.
• No flowers — Insufficient sun or over-fertilising producing leaf at the expense of bloom.
• Lavender shab — Fungal disease causing branch dieback; cut out and dispose.

Companion plants

Lavender pairs well with Rose, Rosemary, Sage, and Thyme. These are species with similar light and water needs, so you can group them in the same room or on the same shelf and water as a batch.

Propagation

Softwood cuttings in summer root in 4-6 weeks under a humidity dome. 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

Lavender is toxic to pets. ASPCA lists lavender as toxic to cats, dogs, and horses due to linalool and linalyl acetate. Garden nibbles are low risk; concentrated essential oils and large ingestions cause vomiting and GI upset. 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.

Lavender deep-dive guides

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

• Common lavender problems & fixes
• Lavender watering schedule
• Lavender light requirements
• Best soil mix for lavender
• Lavender fertilizing guide
• When to repot lavender
• How to propagate lavender
• How to prune lavender
• What's eating my lavender?
• Lavender growth rate & size
• Lavender cold hardiness
• Lavender temperature & humidity
• Is lavender toxic to cats & dogs?
• Is lavender toxic to cats?
• Is lavender toxic to dogs?
• All 25 Lavandula varieties
• Getting lavender to bloom

Featured in these plant shortlists

Lavender qualifies for 5 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.
• Houseplants toxic to cats & dogs — The common houseplants the ASPCA lists as toxic to cats and dogs — the ones to keep out of reach, each with its symptoms and a safe alternative.
• 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 fragrant houseplants — Indoor plants with scented flowers or aromatic foliage — greenery you can smell, selected from our care library.
• Browse all 30 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Lavender is also known as English lavender, true lavender, and common lavender.

• Green Moor Grass care — light, water and common problems
• Common Quaking Grass care — light, water and common problems
• Lesser Quaking Grass care — light, water and common problems
• All 10153 plant care guides in the Growli library