Yellow Whitlow Grass (Alpine Whitlow Grass) care

Light

Yellow Whitlow Grass needs sun on the leaves, not just bright ambient room light. Requires full sun for at least six hours per day; south- or west-facing exposures are ideal, and partial shade leads to lax, poorly-flowering cushions. 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 yellow whitlow grass low — allow soil to dry between waterings. 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. Water sparingly; the plant is drought-tolerant once established and must be protected from excessive winter rain — wet foliage and crowns rot readily.

Soil and pot

Yellow Whitlow Grass grows best in gritty, sharply drained loam or sandy soil. Use a mix of equal parts loam and coarse grit or pea gravel; neutral to alkaline pH (6.5–8.0) is acceptable; heavy clay must be avoided. 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

Yellow Whitlow Grass sits happiest at around Low (30–50% RH) humidity and -25 to 20°C (-13 to 68°F). Naturally inhabits exposed, dry alpine ridges; high ambient humidity combined with wet soil is the primary cause of crown rot and decline. 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 yellow whitlow grass sparingly. Apply a single light dressing of low-nitrogen, high-phosphorus fertiliser (e.g., 5-10-10) in early spring; overfeeding produces soft, disease-prone growth. 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 yellow whitlow grass in the Growli community. Each is annotated with the most common cause so you know where to start.

• Crown rot (Pythium / Fusarium) — The most common problem; caused by water sitting in the rosette or waterlogged soil in winter. Plant in vertical crevices or raise on gravel to improve drainage and air circulation around the crown.
• Aphids — Colonies of greenfly can infest stems and buds in spring; treat with a dilute insecticidal soap spray, directing it away from the tight rosette to avoid moisture buildup.
• Slugs and snails — Particularly damaging to young rosettes in mild, damp springs; a top-dressing of coarse grit around the cushion acts as a physical deterrent.

Propagation

Sow seed in autumn in a cold frame (cold stratification aids germination); alternatively, detach individual rosettes in late spring or early summer and root as cuttings in a 50:50 peat-free compost and grit mix. 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

Yellow Whitlow Grass is mildly toxic to pets. Draba aizoides and the genus Draba do not appear on the ASPCA Toxic or Non-Toxic Plant database. As a Brassicaceae (mustard family) plant it contains glucosinolates that can cause mild gastrointestinal upset if ingested in quantity; classified as mildly-toxic pending authoritative ASPCA listing. 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.

Yellow Whitlow Grass deep-dive guides

Every aspect of yellow whitlow grass care, each with its own calibrated guide:

• Common yellow whitlow grass problems & fixes
• Yellow Whitlow Grass watering schedule
• Yellow Whitlow Grass light requirements
• Best soil mix for yellow whitlow grass
• Yellow Whitlow Grass fertilizing guide
• When to repot yellow whitlow grass
• How to propagate yellow whitlow grass
• How to prune yellow whitlow grass
• What's eating my yellow whitlow grass?
• Yellow Whitlow Grass growth rate & size
• Yellow Whitlow Grass cold hardiness
• Yellow Whitlow Grass temperature & humidity
• Is yellow whitlow grass toxic to cats & dogs?
• Is yellow whitlow grass toxic to cats?
• Is yellow whitlow grass toxic to dogs?
• All 10 Draba varieties
• Getting yellow whitlow grass to bloom

Featured in these plant shortlists

Yellow Whitlow Grass 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.
• 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.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Yellow Whitlow Grass is also known as Yellow Whitlow Grass, Alpine Whitlow Grass, and Yellow Whitlowwort.

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