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Plant care

Wallich's Cranesbill (Wallich geranium) care

Geranium wallichianum

Also called Wallich's cranesbill, Wallich geranium.

RHS H6USDA 5-9Pet-safeIndoor 20-30 cm tall

Watering rhythm

Bright indirect light (just back from a sunny window)

Once or twice weekly during dry spells once established

Light

Bright indirect light (just back from a sunny window)

Soil

Moderately fertile, free-draining garden soil

Humidity

Ambient (outdoor)

Temp

-20 to 25°C

Pet safety

Pet-safe

Mature size

20-30 cm tall

Care at a glance

Light

Wallich's Cranesbill is what florists mean by "bright spot, no direct sun" — close enough to a south or east window to feel the brightness, with a sheer curtain or a few feet of distance keeping the sun off the leaves. Full sun to partial shade; afternoon dappled shade in hot summers helps maintain flower colour, particularly the blue tones of 'Buxton's Variety'. A phone lux-meter at the leaf surface should read 1,500-3,000 lux at noon.

Watering

Water wallich's cranesbill once or twice weekly during dry spells once established. 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. Prefers moderately moist, well-drained soil. Avoid prolonged drought as this reduces flowering and causes the foliage to desiccate; do not allow it to sit in standing water.

Soil and pot

Wallich's Cranesbill grows best in moderately fertile, free-draining garden soil. Grows well in most average soils enriched with organic matter. Very heavy clay should be amended with grit for improved drainage. 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

Wallich's Cranesbill sits happiest at around Ambient (outdoor) humidity and -20 to 25°C (-4 to 77°F). Fully outdoor hardy perennial suited to temperate garden conditions; no supplemental humidity required. 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 wallich's cranesbill sparingly. A single application of balanced slow-release fertiliser in spring is sufficient; over-feeding promotes lush foliage at the expense of flowers. 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 wallich's cranesbill in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Powdery mildew in late summerCommon when plants are dry at the root in warm, still conditions; ensure adequate moisture and cut back affected stems to encourage clean regrowth.
  • Self-seeding too freelySome forms self-seed prolifically; deadhead spent flowers if unwanted seedlings are a concern, noting that named cultivars such as 'Buxton's Variety' may not come fully true from seed.

Propagation

Divide clumps in early spring before growth emerges; root basal cuttings in gritty compost in spring with bottom heat. Seed sown fresh outdoors germinates well but cultivar characteristics may vary. 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

Wallich's Cranesbill is pet-safe. True Geranium (cranesbill) species, including G. wallichianum, are considered non-toxic to cats and dogs by the ASPCA. This is distinct from Pelargonium ('geranium' in common trade), which is mildly toxic. 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.

Wallich's Cranesbill care — frequently asked questions

What is the common name for Geranium wallichianum?

Geranium wallichianum is most commonly called Wallich's Cranesbill, but it is also known as Wallich's cranesbill, Wallich geranium. The names refer to the same species, so care instructions for Wallich's Cranesbill apply identically to anything sold as Wallich geranium.

How much light does wallich's cranesbill need?

Wallich's Cranesbill grows best in bright indirect light (just back from a sunny window). Full sun to partial shade; afternoon dappled shade in hot summers helps maintain flower colour, particularly the blue tones of 'Buxton's Variety'.

How often should I water wallich's cranesbill?

Water wallich's cranesbill once or twice weekly during dry spells once established. Prefers moderately moist, well-drained soil. Avoid prolonged drought as this reduces flowering and causes the foliage to desiccate; do not allow it to sit in standing water. 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 wallich's cranesbill toxic to cats and dogs?

Wallich's Cranesbill is pet-safe. True Geranium (cranesbill) species, including G. wallichianum, are considered non-toxic to cats and dogs by the ASPCA. This is distinct from Pelargonium ('geranium' in common trade), which is mildly toxic.

What USDA hardiness zone does wallich's cranesbill grow in?

Wallich's Cranesbill is rated for USDA zone 5-9 and RHS hardiness H6. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Wallich's Cranesbill deep-dive guides

Every aspect of wallich's cranesbill care, each with its own calibrated guide:

Featured in these plant shortlists

Wallich's Cranesbill 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

Wallich's Cranesbill is also commonly called Wallich's cranesbill or Wallich geranium.