Pelargonium x domesticum 'Chocolate Blotch' (Chocolate Blotch regal pelargonium) care

Light

Bright but filtered. Pelargonium x domesticum 'Chocolate Blotch' burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Bright light with gentle morning sun develops the dark petal markings and full trusses; protect from harsh midday summer sun that bleaches blooms and burns leaf edges. 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 pelargonium x domesticum 'chocolate blotch': when the top 2-3 cm of soil is dry, about every 5-7 days in growth. 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 thoroughly, then let the surface dry; reduce after flowering and keep almost dry through winter. Water at the base to keep the dense foliage dry and discourage fungal rots.

Soil and pot

Pelargonium x domesticum 'Chocolate Blotch' grows best in free-draining loam-based potting mix. John Innes No. 2 plus grit gives the steady drainage and weight regals like. Avoid water-retentive mixes; soggy roots lead to black-leg. Neutral to slightly alkaline pH is ideal. 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

Pelargonium x domesticum 'Chocolate Blotch' sits happiest at around 30-50% humidity and 10-21°C (50-70°F). Average to dry air suits it; the priority is airflow, since still, humid conditions around the bushy crown bring on botrytis and rust. If you keep the room above 10 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 pelargonium x domesticum 'chocolate blotch' sparingly. Use a balanced liquid feed every 1-2 weeks in spring, moving to a high-potash feed as buds appear; stop feeding after flowering and over winter. 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 pelargonium x domesticum 'chocolate blotch' in the Growli community. Each is annotated with the most common cause so you know where to start.

• One short bloom flush — Regals flower mainly in spring; give a cool winter rest and bright spring light to encourage strong repeat trusses.
• Pelargonium rust — Orange-brown pustules under the leaves in humid air; pick off infected leaves and increase ventilation early.
• Botrytis on spent flowers — Grey mould forms on fading petals in damp conditions; deadhead promptly and keep the plant airy.
• Stem rot from overwatering — Blackening at the base after cold, wet compost; water sparingly and ensure sharp drainage.

Propagation

Root 8-10 cm semi-ripe cuttings from non-flowering shoots in late summer. Strip the lower leaves, let the cut callus, and insert into gritty, barely moist compost at about 18°C; expect roots in 3-4 weeks. 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

Pelargonium x domesticum 'Chocolate Blotch' is toxic to pets. The ASPCA classifies Pelargonium species (geranium) as toxic to cats, dogs and horses. Toxic principles are geraniol and linalool; ingestion can cause vomiting, anorexia, depression and dermatitis. Keep out of reach of curious pets. 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.

Pelargonium x domesticum 'Chocolate Blotch' deep-dive guides

Every aspect of pelargonium x domesticum 'chocolate blotch' care, each with its own calibrated guide:

• Pelargonium x domesticum 'Chocolate Blotch' watering schedule
• Pelargonium x domesticum 'Chocolate Blotch' light requirements
• Best soil mix for pelargonium x domesticum 'chocolate blotch'
• Pelargonium x domesticum 'Chocolate Blotch' fertilizing guide
• When to repot pelargonium x domesticum 'chocolate blotch'
• How to propagate pelargonium x domesticum 'chocolate blotch'
• Pelargonium x domesticum 'Chocolate Blotch' growth rate & size
• Pelargonium x domesticum 'Chocolate Blotch' cold hardiness
• Pelargonium x domesticum 'Chocolate Blotch' temperature & humidity
• Is pelargonium x domesticum 'chocolate blotch' toxic to cats & dogs?
• Is pelargonium x domesticum 'chocolate blotch' toxic to cats?
• Is pelargonium x domesticum 'chocolate blotch' toxic to dogs?
• Getting pelargonium x domesticum 'chocolate blotch' to bloom

Featured in these plant shortlists

Pelargonium x domesticum 'Chocolate Blotch' qualifies for 4 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• 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.
• Houseplants toxic to cats & dogs — The common houseplants the ASPCA lists as toxic to cats and dogs — the ones to keep out of reach, each with its symptoms and a safe alternative.
• 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

Pelargonium x domesticum 'Chocolate Blotch' is also commonly called Chocolate Blotch regal pelargonium.

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