Haworthia cymbiformis
| Light | Bright, indirect light; will scorch in harsh direct sun |
|---|---|
| Water | Regularly in growth when the mix has dried; ease off in the cold, dark months |
| Soil | Gritty, free-draining mix with plenty of mineral content (see Soil and potting mix) |
| Temperature | Keep above freezing; happiest in ordinary room temperatures, USDA zones 10–11 |
| Propagation | Offsets (very easy); also leaf cuttings and seed |
| Toxicity | Non-toxic to cats and dogs |
Haworthia cymbiformis is a small, clumping South African succulent that forms tight rosettes of plump, boat-shaped leaves, each tipped with a translucent "window" laced with darker green veins. Grown for that soft, jewel-like foliage and an obliging, offset-happy nature, it is one of the friendliest Haworthia for a windowsill and has earned the common name cathedral window haworthia for the way light glows through its leaf tips.
Description
Haworthia cymbiformis forms low, dense rosettes usually 5–8 cm across, freely producing offsets until it builds up into a fat, cushiony clump. The leaves are its calling card: soft, swollen and distinctly boat- or keel-shaped (the epithet cymbiformis means "boat-shaped"), pale to mid green, and rounded rather than sharply pointed. Toward each leaf tip the flesh becomes translucent, forming a small window criss-crossed by darker green venation — an adaptation that lets light reach photosynthetic tissue in plants that grow partly buried or shaded in the wild.
Compared with the stiffer, warty Haworthia relatives, this is a soft-leaved species: the foliage feels turgid and slightly yielding, and bruises or marks easily. Slender flower spikes rise well above the rosette in the growing season, carrying small, tubular white flowers striped with green or brownish veins. The blooms are modest — this is a plant grown for its leaves, not its flowers.
Distribution and habitat
The species is native to the Eastern Cape of South Africa, where it grows on rocky outcrops, cliff faces and shaded ledges, often tucked among rocks or into crevices that shelter it from the fiercest sun. In these spots plants frequently sit in the light shade of surrounding vegetation or rock, which is why the leaf windows and a preference for bright-but-filtered light make so much sense in cultivation. It is a variable species across its range, with several recognised forms and varieties differing in leaf size, colour and window clarity.
Cultivation
Haworthia cymbiformis is genuinely easy and a fine beginner's succulent. Give it bright, indirect light — an east- or shaded south-facing window is ideal — and protect it from strong midday sun, which bleaches and scorches the soft leaves. In too little light the rosette stretches and pales; in good light the plant stays compact with better colour, sometimes blushing a little at the tips.
Pot it in a gritty, free-draining mix and water thoroughly once the mix has dried out, then let it dry again before the next drink. Unlike many desert cacti, this species is not fond of a long, bone-dry baking; it appreciates fairly regular water through the warmer months and only a cautious reduction — not a total drought — during the cooler, darker part of the year. Steady moisture and light produce the plumpest, best-looking rosettes. See Watering and Repotting for general technique, and lift and divide clumps every couple of years to keep them vigorous.
Propagation
This is one of the simplest succulents to multiply. Established plants offset freely, and the easiest method is simply to detach rooted pups and pot them up individually — see Propagation — offsets. Leaves can also be used as cuttings: removed cleanly, allowed to callus and laid on a gritty mix, they will often form roots and a small plantlet, though results are less reliable than with offsets. Seed is possible too (see Propagation — seed) but slower, and because the species is variable, seedlings may not match the parent.
Common problems
- Rot — the usual cause of loss, from overwatering, a soggy mix or water pooling in the rosette; leaves go soft, translucent and mushy from the base.
- Scorch and bleaching — too much direct sun turns the soft leaves whitish, reddened or crispy at the tips.
- Etiolation — insufficient light stretches the rosette and fades its colour, spoiling the tidy, cushiony shape.
- Pests — mealybugs (white fluff in the leaf axils and around the roots) are the most common nuisance; watch also for root mealybugs and the occasional aphid on flower spikes. See Pests and diseases.
See also
- Haworthia — the genus overview
- Soil and potting mix · Watering · Repotting
- Propagation — offsets · Propagation — cuttings · Propagation — seed
- Pests and diseases