Cyphostemma juttae
| Light | Bright light to full sun; the more light, the stockier the caudex |
|---|---|
| Water | Regularly while in leaf; keep dry once dormant and leafless |
| Soil | Very free-draining gritty mix (see Soil and potting mix) |
| Temperature | Keep above freezing; frost-tender, USDA zones 10–11 |
| Propagation | Seed (primary); cuttings possible but slower to form a caudex |
| Toxicity | Sap, leaves and berries are considered toxic; keep away from pets and children |
Cyphostemma juttae is a striking caudiciform succulent endemic to Namibia, in south-western Africa, forming a stout, swollen bottle-trunk topped by a crown of large, fleshy, blue-green leaves. Its thick trunk is sheathed in papery, peeling yellowish bark and, together with its bare winter silhouette, gives the plant the look of a miniature baobab. A member of the grape family Vitaceae, it belongs to the genus Cyphostemma and bears small bunches of grape-like fruit, which give it the common names Namibian grape and wild grape.
Description
Cyphostemma juttae is a slow-growing, deciduous succulent that develops a fat, water-storing trunk (a caudex) which can reach a metre or more tall and a good span across on old specimens. The trunk is topped by a few short, thick branches, and its yellowish to coppery bark peels away in thin papery sheets — an adaptation thought to reflect sunlight and shade the living tissue beneath.
In the growing season the crown carries large, broad leaves that are thick, leathery and blue-green, often with toothed margins and a slightly waxy or grey bloom. Small greenish-yellow flowers are followed by drooping clusters of red to purple, grape-like berries. These fruits, and the plant's sap, contain irritant compounds and are regarded as toxic — the resemblance to edible grapes is only skin-deep.
Distribution and habitat
The species is native to Namibia, where it grows on rocky hillsides and in dry, open scrub. It endures long droughts and intense sun by storing water in its swollen trunk and dropping its leaves during the dry season, standing leafless and bottle-shaped until the rains return. Plants typically anchor among rocks in gritty, sharply drained ground.
Cultivation
Cyphostemma juttae is a rewarding container and landscape plant in warm, dry climates, prized for the sculptural bulk of its caudex. Grow it in a very free-draining, mostly mineral mix and give it as much light as you can — bright sun keeps the trunk squat and swollen rather than thin and drawn.
Water fairly generously through the warm months while the plant is in full leaf, always letting the mix dry well between drinks. As the days shorten the plant will naturally yellow and drop its leaves; once dormant, keep it dry and warm, as a cold, wet caudex rots easily. It is frost-tender, so bring it under cover or indoors where winters are cold. The species is naturally slow, and a thick trunk is the reward of patience over many years. See Watering and Repotting for general technique.
Propagation
Seed is the usual and most satisfying method, giving plants that build a naturally fat, well-shaped caudex from the base up. Sow fresh seed on a warm, gritty, mineral surface kept lightly moist until germination, then grow the seedlings on hard in bright light. Cuttings will sometimes root, but they tend to stay stem-like and are slow to swell into a proper caudex, so seed is preferred for good trunks. See Propagation — seed and Propagation — cuttings for full walkthroughs.
Common problems
- Rot — the commonest killer, almost always from watering a dormant or cold plant, or from a mix that holds too much moisture around the caudex.
- Etiolation — too little light makes the trunk thin and the growth leggy, losing the prized stocky form.
- Frost damage — the fleshy tissue is easily ruined by freezing; protect from any frost.
- Pests — mealybugs may lodge in the leaf axils and among peeling bark; watch also for the usual spider mites and scale.
See also
- Cyphostemma — the genus overview
- Soil and potting mix · Watering · Repotting · Propagation — seed · Propagation — cuttings