Plate No. 56

Cocoon Plant

Senecio haworthii

"Silken white silk-wrapped fingers"

Native to

Arid Little Karoo of South Africa

Botanical illustration of Cocoon Plant
Senecio haworthii — drawn from life
History

A brief account

Endemic to a narrow band of the Karoo, its cylindrical leaves are so densely wrapped in silvery-white felt that they resemble tiny silkworm cocoons — a mirror-like coat that reflects the fierce sun and traps the thin desert dew. The Khoi people knew it as a bitter but effective wound dressing.

How to care for

Place Cocoon Plant according to its light needs: Full, direct sun — the felt intensifies with strong light. For watering, very sparingly. Water from below to preserve the white fuzz. For the potting medium, use pure mineral mix, mostly pumice and coarse sand. Good drainage is essential: let surplus water escape freely and never leave the roots standing in a wet saucer. 10–30°C. Resents damp winters. Check the compost before watering instead of following a rigid calendar, since light, temperature, pot size and season all affect how quickly it dries. During slower growth, reduce watering and wait longer between drinks.

How to propagate

Stem cuttings; handle gently to preserve the felt. Propagation is most reliable during the plant's active growing season, when warmth and good light help new roots establish. Start with clean tools and healthy material, and keep the new plant in conditions appropriate for the parent. Where a cutting or division creates a wound, allow the surface to dry before planting unless the method calls for immediate rooting in water or moist mix. Once roots form and fresh growth appears, gradually move the young Cocoon Plant into its normal watering routine; excess moisture is especially risky while the root system is still small.
Cultivation

Quick tips for care & planting

Light
Full, direct sun — the felt intensifies with strong light.
Water
Very sparingly. Water from below to preserve the white fuzz.
Soil
Pure mineral mix, mostly pumice and coarse sand.
Temperature
10–30°C. Resents damp winters.
Propagation
Stem cuttings; handle gently to preserve the felt.