Geranium sylvaticum (Wood cranesbill) care

Light

Geranium sylvaticum wants the spot a few feet back from a sunny window — bright enough to read a paperback at noon, but the sun never falls directly on the leaves. Happiest in part shade to dappled woodland light; tolerates full sun in cooler, reliably moist gardens but scorches in hot, dry exposure. Reflects its native woodland-edge and upland-meadow habitat. A faint hand shadow at midday is the right amount; a sharp dark shadow means it's getting direct sun and probably too much.

Watering

Water geranium sylvaticum keep soil evenly moist; water deeply when the top 3-4 cm dries, roughly weekly in growing season. 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 consistently moist ground and dislikes drought; mulch to retain moisture. Established clumps in suitable soil need little supplemental water except in prolonged dry spells.

Soil and pot

Geranium sylvaticum grows best in fertile, humus-rich, moisture-retentive loam. Grows in any reasonable garden soil that holds moisture, ideally enriched with leaf mould or compost. Tolerates neutral to slightly alkaline or acid soils; avoid baking-dry, free-draining sites. 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

Geranium sylvaticum sits happiest at around Outdoor ambient humidity and -30 to 24°C (-22 to 75°F). A fully hardy garden perennial with no humidity requirement; thrives in temperate outdoor air and tolerates damp UK summers well. 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 geranium sylvaticum sparingly. Undemanding. An annual spring mulch of compost or leaf mould usually supplies enough nutrients; a single balanced general fertiliser application in spring suffices on poor soils. Avoid heavy feeding, which encourages floppy growth 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 geranium sylvaticum in the Growli community. Each is annotated with the most common cause so you know where to start.

• Powdery mildew — White powdery coating on leaves in late summer, worse in dry soil and poor air circulation. Cut affected foliage back hard; the plant flushes fresh, clean leaves.
• Leaf scorch in dry sun — Crispy brown leaf margins where the plant bakes in hot, dry positions. Move to part shade or improve soil moisture and mulch.
• Flopping after flowering — Stems sprawl and foliage looks tired once blooms fade. Shear the whole clump back by half to two-thirds for a tidy mound of new growth.
• Vine weevil (in containers) — Notched leaf edges and sudden collapse from larvae eating roots. Inspect rootballs, use biological nematode controls, or grow in open ground where damage is rare.

Propagation

Divide established clumps in autumn or early spring, replanting healthy outer sections. Also grows readily from fresh seed sown in autumn (it can self-seed in the garden); basal cuttings in spring root reliably. 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

Geranium sylvaticum is mildly toxic to pets. The true Geranium genus (hardy cranesbills) is not individually listed on the ASPCA toxic plant database; the ASPCA 'Geranium' entry actually refers to Pelargonium (scented/bedding geranium), which is toxic via geraniol and linalool. Cranesbills are widely regarded as non-toxic, but because Geranium sylvaticum is not specifically ASPCA-listed, treat with caution and verify with a vet before assuming pet-safe. 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.

Geranium sylvaticum deep-dive guides

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

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

Featured in these plant shortlists

Geranium sylvaticum qualifies for 6 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best low-light houseplants — Houseplants that need no direct sun and cope with a north-facing room or a spot well back from a window.
• Best plants for a north-facing window — Houseplants for a north-facing window: bright, even, indirect light and no scorching direct sun. Each pick verified against its documented light needs.
• Best drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• Best houseplants for beginners — Forgiving of irregular light and watering — the houseplants least likely to die in a new plant parent’s first season.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• 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

Geranium sylvaticum is also commonly called Wood cranesbill or Woodland geranium.

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