large-flowered petrocosmea

Grow in a cold greenhouse or alpine house, in indirect light, in a shallow pot of very well-drained loam-based compost such as John Innes No. 2 with added grit and leafmould; water moderately while growing, and sparingly in winter, and always keep water off the leaves; in frost-free climates, grow in shade in vertical crevices in walls or rock gardens so that rain will drain away

No pruning required

Propagate by seed sown as soon as it is ripe, or by leaf cuttings in summer and autumn

May be affected by slugs, snails, aphids, glasshouse whitefly, mealybugs, scale insects and tarsonemid mites

May be affected by mildew and by crown, leaf, stem and root rots