Burchard's Caralluma (Canary Island Caralluma) care

Light

Most houseplants will scorch where burchard's caralluma thrives. Give it the windowsill you'd otherwise leave empty because everything else burned there. Requires full sun or very bright indirect light for at least 4–5 hours daily. A south-facing windowsill or unshaded greenhouse bench is ideal. Inadequate light causes pale, weak stems. A plant moved abruptly from low light to direct sun bleaches in 48 hours — always acclimatise over a week.

Watering

Aim for every 2–3 weeks in spring and autumn; very sparingly in summer and winter for burchard's caralluma, 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. Water moderately during active growth, allowing the mix to dry completely between waterings. Reduce significantly in summer heat and winter cool. Stapeliad stems store water; they rot rapidly if overwatered.

Soil and pot

Burchard's Caralluma grows best in extremely free-draining cactus/mineral mix. Use 30% cactus compost blended with 70% perlite, pumice, or coarse sand. Excellent drainage and aeration at the roots is non-negotiable for stapeliad succulents. 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

Burchard's Caralluma sits happiest at around 20–40% humidity and 10–35°C (50–95°F). Low humidity is preferred. High humidity combined with stagnant air causes stem rot. Grow in a well-ventilated room or greenhouse; avoid enclosed terrariums. If you keep the room above 10–35°C 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 burchard's caralluma sparingly. Feed once in spring with a very dilute, low-nitrogen cactus fertiliser (e.g. 5-10-10). Over-fertilising with nitrogen produces lush but rot-susceptible 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 burchard's caralluma in the Growli community. Each is annotated with the most common cause so you know where to start.

• Stem base rot — Soft, dark discolouration at the stem base is usually caused by overwatering or poor drainage. Remove affected stems with a clean blade, allow to callous, and repot into fresh dry gritty mix.
• Flower odour attracting flies — The carrion-scented flowers attract blowflies for pollination — this is natural. Move the plant outdoors during flowering if the odour is unpleasant indoors, or remove spent flower clusters promptly.
• Mealybugs — Mealybugs hide in stem angles and between ribs. Treat with a cotton bud dipped in isopropyl alcohol for small infestations, or apply a systemic insecticide for severe cases.

Propagation

Take 5–8 cm stem cuttings in late spring or summer; allow the cut end to dry for 3–5 days before inserting into barely moist gritty mix. Can also be grown from seed sown on a mineral substrate at 22–26°C with good light. 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

Burchard's Caralluma is mildly toxic to pets. Caralluma belongs to Apocynaceae (subfamily Asclepiadoideae, formerly Asclepiadaceae). It is not individually listed by ASPCA. Other Apocynaceae members contain cardenolides or other alkaloids; ingestion of any part may cause gastrointestinal distress in pets and humans. Treat as mildly toxic and keep out of reach of pets and children. 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.

Burchard's Caralluma deep-dive guides

Every aspect of burchard's caralluma care, each with its own calibrated guide:

• Burchard's Caralluma watering schedule
• Burchard's Caralluma light requirements
• Best soil mix for burchard's caralluma
• Burchard's Caralluma fertilizing guide
• When to repot burchard's caralluma
• How to propagate burchard's caralluma
• Burchard's Caralluma growth rate & size
• Burchard's Caralluma cold hardiness
• Burchard's Caralluma temperature & humidity
• Is burchard's caralluma toxic to cats & dogs?
• Is burchard's caralluma toxic to cats?
• Is burchard's caralluma toxic to dogs?

Featured in these plant shortlists

Burchard's Caralluma qualifies for 5 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 succulents for beginners — The easiest succulents and cacti to keep alive — selected by documented growth habit, each with the light and watering it actually wants.
• Best small & tabletop houseplants — Compact houseplants that stay under about 40 cm — desk, shelf and windowsill plants that never outgrow a small space.
• 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

Burchard's Caralluma is also commonly called Burchard's Caralluma or Canary Island Caralluma.

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