Asphodel Cranesbill (Starlight Geranium) care

Light

Bright but filtered. Asphodel Cranesbill burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Prefers full sun to partial shade; in hotter climates (USDA zones 7–9), light afternoon shade prevents premature flowering exhaustion and leaf bleaching. 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 asphodel cranesbill: weekly during the growing season; reduce in autumn. 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. Water regularly during dry spells; good drainage is essential as the plant will not tolerate waterlogged soil, especially in winter when root rot risk is highest.

Soil and pot

Asphodel Cranesbill grows best in moderately fertile, sharply drained loam or sandy loam. Excellent drainage is the most critical soil requirement; add horticultural grit to clay soils and avoid planting in frost pockets where wet winter soil persists. 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

Asphodel Cranesbill sits happiest at around Ambient outdoor humidity (40–70%) humidity and -15 to 28°C (5 to 82°F). No special humidity requirements; a sheltered but open site with good airflow suits this species well in the UK and coastal US climates. 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 asphodel cranesbill sparingly. Apply a balanced slow-release fertiliser in spring; overly rich feeding can produce lush but 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 asphodel cranesbill in the Growli community. Each is annotated with the most common cause so you know where to start.

• Winter crown rot — In heavy wet soils or cold, waterlogged frost pockets, the crown can rot over winter; plant on a raised ridge, mix in grit, and apply a dry mulch of bark or gravel over the crown in November.
• Floppy stems — The airy growth habit means stems lean through neighbouring plants; use light pea-stick support early in the season or plant at the base of shrubs where the structure provides natural support.

Propagation

Divide clumps in early spring. Self-seeds freely in favourable conditions; collect seed when ripe and sow immediately or stratify in a refrigerator for six weeks before spring sowing. 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

Asphodel Cranesbill is pet-safe. True Geranium (cranesbill) species are non-toxic to cats and dogs per ASPCA guidance, in contrast to Pelargonium (florist's geranium), 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.

Asphodel Cranesbill deep-dive guides

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

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

Featured in these plant shortlists

Asphodel 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

Related guides

Asphodel Cranesbill is also commonly called Asphodel Cranesbill or Starlight Geranium.

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