Geranium sanguineum 'Max Frei' (Max Frei cranesbill) care

Light

Aim for at least 4-6 hours of direct sun on the leaves. Full sun gives the tightest mound and heaviest flowering with the best autumn leaf colour. Tolerates very light shade but blooms less freely and grows looser. If your only bright window faces south, that's perfect for geranium sanguineum 'max frei' — same window any aroid would fry on.

Watering

Watering geranium sanguineum 'max frei': water when top 3-5 cm of soil is dry; drought-tolerant once established. 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. Keep new plants watered through the first season. Established clumps shrug off dry spells; avoid soggy soil, which rots the compact crown.

Soil and pot

Geranium sanguineum 'Max Frei' grows best in well-drained, moderately fertile soil; tolerates lean, gritty ground. Performs on free-draining loam, chalk, sand and gravel. Sharp drainage is key; heavy wet clay invites rot. Ideal in raised beds and gravel plantings. 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 sanguineum 'Max Frei' sits happiest at around 40-70% humidity and -25 to 27°C (-13 to 80°F). Hardy outdoor perennial indifferent to humidity and happiest with dry air and good airflow, which limit mildew. No misting or humidity control needed. 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 sanguineum 'max frei' sparingly. Minimal feeding. A light spring mulch or one balanced feed sustains it; excess nitrogen loosens the prized compact habit and cuts flowering. 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 sanguineum 'max frei' in the Growli community. Each is annotated with the most common cause so you know where to start.

• Powdery mildew in heat — White coating appears during hot, dry or congested conditions. Increase airflow, water at the base, and shear affected growth.
• Crown rot in heavy wet soil — Waterlogging causes yellowing and collapse of the dense crown. Plant in sharply drained soil and avoid overwatering.
• Loss of compactness — Rich soil, shade or over-feeding makes the tidy mound flop. Reduce feeding, give full sun, and shear after the first flush.
• Mid-season decline — Flowering and foliage can flag in late summer. A shear-back by one-third renews the mound and triggers fresh blooms.

Propagation

Propagate by division in spring or autumn to keep the cultivar true; basal cuttings in spring root readily. Do not raise from seed, which will not reproduce the compact, deep-pink form. 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 sanguineum 'Max Frei' is mildly toxic to pets. The ASPCA toxic 'Geranium' / 'Scented Geranium' listings apply to Pelargonium (geraniol and linalool), not to true cranesbills. Geranium sanguineum is not individually listed by the ASPCA; hardy geraniums are broadly considered non-toxic to cats and dogs, but without a specific ASPCA non-toxic listing 'Max Frei' is rated mildly-toxic as a precaution. Verify with a vet and prevent pets from grazing the foliage. 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 sanguineum 'Max Frei' deep-dive guides

Every aspect of geranium sanguineum 'max frei' care, each with its own calibrated guide:

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

Featured in these plant shortlists

Geranium sanguineum 'Max Frei' qualifies for 4 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Best houseplants for full sun — Houseplants that want direct sun — the species for a hot south or west-facing windowsill where shade-lovers scorch.
• 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 sanguineum 'Max Frei' is also commonly called Max Frei cranesbill or Compact bloody geranium.

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