Carrion Flower (Stapelia gigantea) problems — and how to fix them

The most common cause of death, triggered by overwatering, poorly draining soil, or cold-and-wet winters. Stems turn black, mushy, and collapse at the base. Cut well above any rot, let cuttings callous, and replant in dry gritty mix; keep much drier going forward.

Almost always too little light. These plants need full sun or the brightest possible spot, a little potassium-rich feeding, and a cooler, drier winter rest to bloom in late summer to autumn. Crowded, slightly pot-bound clumps often flower best.

The main pest (Missouri Botanical Garden notes susceptibility). Look for white cottony tufts in stem crevices and roots. Dab with a cotton swab dipped in 70% isopropyl alcohol, or treat with insecticidal soap; check the root zone too.

Usually underwatering during the growing season or, in winter, a normal dormancy response. If stems are soft and wrinkled in summer, give a thorough soak; if it is winter, a small drink is enough to plump them back up.

Normal, not a problem with the plant. The huge flowers mimic carrion to attract pollinating flies and can stink for a few days. Move a flowering plant outdoors or to a well-ventilated spot, and remove spent blooms to limit fly activity indoors.

Stems flushing red-purple or developing scorched, corky patches mean too much sudden intense sun, especially after a move outdoors. Acclimate gradually and provide light afternoon shade in the hottest climates.