Valerian (all-heal) care

Light

Aim for at least 4-6 hours of direct sun on the leaves. Grows and flowers best in full sun to partial shade. In deep shade it becomes lax and flowers poorly; some afternoon shade is welcome in hot climates. If your only bright window faces south, that's perfect for valerian — same window any aroid would fry on.

Watering

Watering valerian: keep moist; water when the top 3 cm of soil dries, roughly every 4-7 days in dry weather. 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. A moisture-loving plant happiest in soil that stays reliably damp. Water during dry spells, particularly while establishing; it tolerates wet ground far better than drought.

Soil and pot

Valerian grows best in fertile, moist, well-drained loam. Prefers rich, moisture-retentive soil with a pH around 6.0-7.5 but adapts to most soils, including damp and heavy ground. Improve poor soils with organic matter to support its tall growth. 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

Valerian sits happiest at around 50-70% humidity and 10-24°C (50-75°F). An adaptable temperate perennial indifferent to air humidity outdoors; its real preference is for consistently moist soil. It naturalises along streamsides and in damp grassland. If you keep the room above 10 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 valerian sparingly. Undemanding. A spring mulch of compost or one application of balanced general fertiliser is sufficient; avoid heavy feeding, which produces tall floppy stems at the expense of root quality. 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 valerian in the Growli community. Each is annotated with the most common cause so you know where to start.

• Aggressive self-seeding — Valerian sets copious seed and can spread well beyond its spot. Deadhead spent flower heads before seed ripens to keep it in bounds.
• Tall stems flopping — The slender flowering stems can lean in rich soil, wind, or shade. Site in sun and stake or grow through supports if needs be.
• Cats disturbing plants — The root's scent attracts cats, which may roll on or dig up plantings much as they do with catnip. Protect young plants if neighbourhood cats are a nuisance.
• Drought stress — On dry soils the foliage wilts and browns. Mulch and water through dry spells to keep it vigorous and well-flowered.

Propagation

Propagated by division of the clump in autumn or early spring, or from seed sown fresh in autumn or spring; seed is short-lived and germinates best when sown promptly with light. Self-sown seedlings can also be lifted and transplanted while small. 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

Valerian is mildly toxic to pets. Valeriana officinalis is not on the ASPCA toxic-plant list and is generally regarded as low-toxicity, but it is not formally listed as non-toxic either, so it is treated as uncertain; verify with a vet. Notably, valerian acts as a catnip-like attractant and stimulant for many cats; large ingestions typically cause only mild vomiting or sedation. 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.

Valerian deep-dive guides

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

• Valerian watering schedule
• Valerian light requirements
• Best soil mix for valerian
• Valerian fertilizing guide
• When to repot valerian
• How to propagate valerian
• Valerian growth rate & size
• Valerian cold hardiness
• Valerian temperature & humidity
• Is valerian toxic to cats & dogs?
• Is valerian toxic to cats?
• Is valerian toxic to dogs?

Featured in these plant shortlists

Valerian 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

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Valerian is also known as valerian, garden valerian, and all-heal.

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