Stapelia hirsuta

🌵 Care at a glance
Light	Bright light with some direct sun; light shade in the hottest afternoons
Water	Regularly in the warm growing season, letting the mix dry between waterings; keep nearly dry in winter
Soil	Fast-draining, gritty mix (see Soil and potting mix)
Temperature	Keep above about 5–7 °C; frost-tender, USDA zones 9b–11
Propagation	Stem cuttings (easy); also seed
Toxicity	Generally regarded as non-toxic to cats and dogs

Stapelia hirsuta is a clump-forming, spineless stem succulent from southern Africa, grown for its extraordinary star-shaped flowers rather than its foliage. Each bloom is a velvety, purple-brown five-pointed star densely clothed in soft, shaggy hairs — the trait behind both its species name (hirsuta, "hairy") and the common name hairy starfish flower. Like other members of the genus Stapelia, it is a carrion flower that mimics rotting meat to attract fly pollinators, and its ease of growth makes it a classic beginner's introduction to the group.

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Description

Stapelia hirsuta forms low, spreading clumps of erect, four-angled green stems up to about 15 cm tall, soft and fleshy rather than woody, and edged with small soft teeth instead of true spines. The stems branch from the base to build up a cushion over time, and are leafless — photosynthesis happens in the green stem tissue itself.

The flowers are the main event. Borne singly or a few together, usually near the base of the stems, they open into flat, five-lobed stars commonly 8–12 cm across. The lobes are wrinkled, reddish- to purple-brown, often with fine paler cross-banding, and are covered — especially toward the margins — in long, soft, shimmering hairs that give the whole flower a plush, animal-like texture. As with all Stapelia, the open blooms give off a carrion-like odour that attracts blowflies, which pollinate them; the smell is strongest in warm sun and fades once the flower is past.

Distribution and habitat

The species is native to South Africa, where it grows in dry, rocky and sandy places, often tucked among rocks or in the light shade of shrubs. It is a variable species across its range, with several named forms and varieties differing in flower colour, size and hairiness. In habitat the plants endure long dry spells and receive most of their moisture during the warm season.

Cultivation

Stapelia hirsuta is one of the easiest stem succulents to grow and flowers freely, which is why it turns up so often on beginners' windowsills. Grow it in a very free-draining, gritty mix in a shallow, wide pot that suits its spreading habit. Give it bright light with some direct sun to keep the stems compact and encourage flowering; too little light produces thin, floppy, pale growth.

Water regularly through the warm growing season, allowing the mix to dry out between waterings, then keep the plant nearly dry through the cool months. The stems are prone to rot if kept cold and wet, so err on the side of dryness in winter and ensure good air movement. Protect from frost. See Watering and Repotting for general technique, and note that clumps are easily divided when they outgrow their pot.

Propagation

Propagation is easy from stem cuttings: detach a healthy stem segment, let the cut end dry and callus for a few days, then set it on or just into a dry, gritty mix and water sparingly until roots form. Divisions of established clumps root readily the same way. The species also grows from seed, which germinates quickly when fresh but is less commonly used by hobbyists. See Propagation - cuttings and Propagation - seed for full walkthroughs.

Common problems

Stem rot — the commonest cause of loss, almost always from overwatering, a slow-draining mix, or cold wet conditions; affected stems turn soft, yellow and mushy. Remove rot promptly and take cuttings from clean tissue.
Etiolation — insufficient light makes the stems thin, pale and weak, and reduces flowering.
Pests — mealybugs (white fluff at the stem bases and roots) are the usual culprits; watch also for spider mites in hot, dry air.
Buds dropping — flower buds may abort if the plant is moved, stressed or watered erratically as they develop.

References

Horticultural information for growing these plants as ornamentals. Always confirm plant identification and any handling, grafting, or safety advice against authoritative sources before acting.