Pink Penny Cranesbill (Hardy Geranium 'Pink Penny') care

Light

Bright but filtered. Pink Penny Cranesbill burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Grows best in full sun to light partial shade; full sun produces the most compact habit and richest flower colour, while too much shade results in lax stems and fewer blooms. If you only have a south window, set the plant back 1.5 m or hang a sheer curtain — both knock the intensity down into the right range.

Watering

Watering pink penny cranesbill: water once or twice a week during dry periods; reduce in winter. 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. Prefers moderately moist, well-drained soil; established plants tolerate short dry spells but suffer in waterlogged soils, especially in winter when cold wet conditions can cause crown rot.

Soil and pot

Pink Penny Cranesbill grows best in moderately fertile, well-drained. Performs well in chalk, loam, or sandy soil; if planting in clay, incorporate sharp grit or horticultural sand to improve drainage — good drainage is the single most important soil factor for overwinter survival. 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

Pink Penny Cranesbill sits happiest at around Average garden humidity (40-70% RH) humidity and -15 to 30°C (5 to 86°F). Tolerates typical temperate garden humidity; the dense foliage mat can trap moisture, so cut back hard after flowering to allow airflow and prevent fungal disease at the base of the plant. 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 pink penny cranesbill sparingly. Apply a balanced granular or slow-release fertiliser in spring; avoid excess nitrogen which encourages leafy growth over 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 pink penny cranesbill in the Growli community. Each is annotated with the most common cause so you know where to start.

• Vine weevil — Root-feeding grubs cause sudden wilting and plant death, particularly in containers or sandy soils; apply biological control nematodes (Steinernema kraussei) in late August to early September while soil is above 5 °C.
• Powdery mildew — White, powdery coating on foliage in warm, dry spells — more common when plants are stressed by drought; water regularly at the base, improve spacing for airflow, and remove badly affected leaves.
• Geranium sawfly — Larvae skeletonise leaves from May onwards; inspect the undersides of leaves weekly and remove caterpillars by hand, or apply a pyrethrin-based spray at first signs of damage.

Propagation

Divide clumps in spring or take basal cuttings in early to mid-spring; the plant is covered by a US plant patent (PP17656), so propagation for sale is prohibited — home garden division is fine. 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

Pink Penny Cranesbill is pet-safe. True Geranium (cranesbill) species are not listed on the ASPCA Toxic Plants database; ASPCA's toxic 'Geranium' entry refers solely to Pelargonium species. Geranium 'Pink Penny', as a true cranesbill, is consistently cited as non-toxic to cats and dogs by veterinary and horticultural sources. 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.

Pink Penny Cranesbill deep-dive guides

Every aspect of pink penny cranesbill care, each with its own calibrated guide:

• Common pink penny cranesbill problems & fixes
• Pink Penny Cranesbill watering schedule
• Pink Penny Cranesbill light requirements
• Best soil mix for pink penny cranesbill
• Pink Penny Cranesbill fertilizing guide
• When to repot pink penny cranesbill
• How to propagate pink penny cranesbill
• How to prune pink penny cranesbill
• What's eating my pink penny cranesbill?
• Pink Penny Cranesbill growth rate & size
• Pink Penny Cranesbill cold hardiness
• Pink Penny Cranesbill temperature & humidity
• Is pink penny cranesbill toxic to cats & dogs?
• Is pink penny cranesbill toxic to cats?
• Is pink penny cranesbill toxic to dogs?
• All 78 Geranium varieties
• Getting pink penny cranesbill to bloom

Featured in these plant shortlists

Pink Penny Cranesbill qualifies for 8 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best pet-safe houseplants — Houseplants the ASPCA lists as non-toxic to cats and dogs — every one verified against the ASPCA toxic and non-toxic plant list.
• 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 flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Best pet-safe flowering plants — Flowering houseplants the ASPCA lists as non-toxic to cats and dogs — colour and blooms in a pet home, without the worry.
• Best pet-safe plants for bright light — Non-toxic to cats and dogs and happy in a bright, sunny spot — safe plants for your best-lit windowsill.
• 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.
• Best cat-safe plants — Houseplants the ASPCA lists as non-toxic to cats (and dogs) — safe greenery for a home with a curious cat.
• Best dog-safe plants — Houseplants the ASPCA lists as non-toxic to dogs (and cats) — safe greenery for a home with a curious dog.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

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Pink Penny Cranesbill is also commonly called Pink Penny Cranesbill or Hardy Geranium 'Pink Penny'.

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