Dilys Cranesbill (Hardy Geranium 'Dilys') care

Light

Picture the indirect light an east-facing window gives mid-morning — that's the brightness dilys cranesbill grows fastest in. Performs well in full sun to partial shade; in hot summer climates protect from fierce afternoon sun to prevent leaf scorch — morning sun with light afternoon shade gives the best combination of flower colour and foliage health. You'll know it's right when new leaves come out the same size and colour as the established ones. Smaller, paler new leaves = move closer to the window.

Watering

Aim for water once a week during dry spells; largely self-sufficient once established in uk conditions for dilys cranesbill, but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Unusually tolerant of both drought and occasional waterlogging compared with other cranesbills; prefers consistently moist but well-drained soil, making it suitable for spots that are not reliably dry.

Soil and pot

Dilys Cranesbill grows best in moderately fertile, moist to well-drained. Grows in chalk, clay, loam, or sand; one of the few cranesbills that copes with poorly drained soils without dying back prematurely — still avoid prolonged waterlogging at the crown. 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

Dilys Cranesbill sits happiest at around Average garden humidity (40-70% RH) humidity and -35 to 28°C (-31 to 82°F). Tolerates the range of outdoor humidity across UK and northern US gardens; ensure reasonable air circulation through the clump to reduce the risk of botrytis in persistently wet autumns. 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 dilys cranesbill sparingly. Top-dress with a balanced slow-release fertiliser in spring; high-fertility soils are not needed and can produce overly lush, floppy growth. 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 dilys cranesbill in the Growli community. Each is annotated with the most common cause so you know where to start.

• Geranium sawfly larvae — Small grey-green caterpillars defoliate plants rapidly from late spring; check undersides of leaves from May and remove larvae by hand or apply a suitable insecticide at first sign of damage.
• Downy mildew — Yellow patches on the upper leaf surface with grey-purple fungal growth beneath, especially in cool, wet autumns; improve airflow, avoid wetting foliage when watering, and remove affected material promptly.

Propagation

Divide clumps in spring, replanting vigorous outer sections; basal cuttings taken in early to mid-spring root readily with bottom heat. 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

Dilys Cranesbill is pet-safe. True Geranium (cranesbill) species are not listed on the ASPCA Toxic Plants database; the ASPCA's toxic 'Geranium' entry refers to Pelargonium (containing linalool and geraniol), a completely separate genus. Geranium 'Dilys' as a true cranesbill is consistently cited as non-toxic to cats and dogs by veterinary and horticultural authorities. 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.

Dilys Cranesbill deep-dive guides

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

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

Featured in these plant shortlists

Dilys Cranesbill qualifies for 13 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 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 pet-safe low-light plants — Non-toxic to cats and dogs AND happy with no direct sun — the two hardest constraints to satisfy at once.
• 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 pet-safe low-maintenance plants — Non-toxic to cats and dogs and forgiving of forgotten watering — the easiest safe choices for a busy pet household.
• 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 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 pet-safe bedroom plants — Non-toxic to cats and dogs and happy in lower light — calming greenery for a bedroom where a pet often sleeps too.
• 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

Dilys Cranesbill is also commonly called Dilys Cranesbill or Hardy Geranium 'Dilys'.

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