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Plant care

Hairy-fruited Draba (Hairy-fruited Whitlowgrass) care

Draba lasiocarpa

Also called Hairy-fruited Draba, Hairy-fruited Whitlowgrass.

RHS H7USDA 4–8Pet-safeIndoor 10–15 cm tall in flower

Watering rhythm

10-14days

Every 10–14 days during growth; very little in winter

Light

Direct sun (at least 4-6 hours)

Soil

Sharply drained, gritty limestone alpine mix

Humidity

25–55%

Temp

-18–22°C

Pet safety

Pet-safe

Mature size

10–15 cm tall in flower

Care at a glance

Light

Hairy-fruited Draba needs sun on the leaves, not just bright ambient room light. Full sun is essential for compact cushion growth and free flowering. Partial shade causes the plant to become loose and leggy. Open, sunny positions on south- or west-facing slopes replicate its natural mountain habitat best. 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 hairy-fruited draba every 10–14 days during growth; very little in winter. 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 at the base only; the hairy leaf surface traps moisture and creates conditions for rot if overhead-watered. Allow the gritty compost to partially dry between waterings. Keep near-dry in winter dormancy.

Soil and pot

Hairy-fruited Draba grows best in sharply drained, gritty limestone alpine mix. A mix of 50% coarse grit or crushed limestone, 25% loam, and 25% leaf mould with a pH of 7.0–7.5 is ideal. The species grows naturally in calcareous screes and limestone crevices in the Balkans. 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

Hairy-fruited Draba sits happiest at around 25–55% humidity and -18–22°C (-0.4–72°F). Low to moderate humidity with excellent ventilation is required. The hairy leaf and pod surfaces are prone to fungal issues in persistently humid or stagnant air. Open, well-ventilated positions or an alpine house are best. 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 hairy-fruited draba sparingly. Apply a dilute low-nitrogen alpine feed (e.g. 4-8-6) once in early spring. Minimal feeding maintains the compact cushion habit and encourages flowering. Rich feeding produces soft growth susceptible to disease. 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 hairy-fruited draba in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Fungal rot on hairy foliageThe hair-covered leaves and pods trap moisture, predisposing the plant to Botrytis and other fungal rots in wet conditions. Remove affected material promptly, improve airflow, and avoid overhead watering entirely.
  • Crown rot in winterPersistent rain and cold wet soil cause the crown to rot. Plant in well-drained, raised positions; top-dress with coarse grit around the collar and consider overhead glass protection in areas with wet winters.
  • Vine weevil grubsRoot destruction by vine weevil larvae causes wilting and cushion collapse. Check roots at repotting and apply biological nematode control (Steinernema kraussei) in spring and autumn.

Propagation

Detach individual rosette cuttings after flowering in early summer and root in gritty compost in a shaded cold frame. Seed (hairy, distinctive pods) can be collected and sown fresh in autumn with cold stratification for spring germination. Division in spring is also effective. 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

Hairy-fruited Draba is pet-safe. Draba lasiocarpa (Brassicaceae) has no recognised toxic compounds. The genus is not listed as toxic by the ASPCA, and no clinically harmful principles have been identified in the veterinary literature. Considered safe around pets and children. 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.

Hairy-fruited Draba care — frequently asked questions

What is the common name for Draba lasiocarpa?

Draba lasiocarpa is most commonly called Hairy-fruited Draba, but it is also known as Hairy-fruited Draba, Hairy-fruited Whitlowgrass. The names refer to the same species, so care instructions for Hairy-fruited Draba apply identically to anything sold as Hairy-fruited Whitlowgrass.

How much light does hairy-fruited draba need?

Hairy-fruited Draba grows best in direct sun (at least 4-6 hours). Full sun is essential for compact cushion growth and free flowering. Partial shade causes the plant to become loose and leggy. Open, sunny positions on south- or west-facing slopes replicate its natural mountain habitat best.

How often should I water hairy-fruited draba?

Water hairy-fruited draba every 10–14 days during growth; very little in winter. Water at the base only; the hairy leaf surface traps moisture and creates conditions for rot if overhead-watered. Allow the gritty compost to partially dry between waterings. Keep near-dry in winter dormancy. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is hairy-fruited draba toxic to cats and dogs?

Hairy-fruited Draba is pet-safe. Draba lasiocarpa (Brassicaceae) has no recognised toxic compounds. The genus is not listed as toxic by the ASPCA, and no clinically harmful principles have been identified in the veterinary literature. Considered safe around pets and children.

What USDA hardiness zone does hairy-fruited draba grow in?

Hairy-fruited Draba is rated for USDA zone 4–8 and RHS hardiness H7. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Hairy-fruited Draba deep-dive guides

Every aspect of hairy-fruited draba care, each with its own calibrated guide:

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Hairy-fruited Draba qualifies for 12 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Hairy-fruited Draba is also commonly called Hairy-fruited Draba or Hairy-fruited Whitlowgrass.