Gasteria acinacifolia
| Light | Bright, indirect light; tolerates part shade and gentle morning sun |
|---|---|
| Water | Moderately in the growing season, letting the soil dry between waterings; keep drier in winter |
| Soil | Free-draining, gritty succulent mix (see Soil and potting mix) |
| Temperature | Keep above freezing; USDA zones 9b–11 |
| Propagation | Leaf cuttings, offsets and seed |
| Toxicity | Generally regarded as non-toxic to cats and dogs |
Gasteria acinacifolia is the largest species in the genus Gasteria, forming big, robust rosettes of long, sword-shaped leaves speckled with pale spots. Native to the coastal dunes and thicket of South Africa's southern and south-eastern Cape coast, it is sometimes known as the dune gasteria and is prized by collectors for its sheer size and handsome, tongue-like foliage.
Description
Gasteria acinacifolia is a stout species that eventually builds large rosettes considerably bigger than most of its relatives. Mature plants bear thick, tapering, sword- or blade-shaped leaves that can reach an impressive length, arranged in a spiralling rosette rather than the flat two-ranked (distichous) fan seen in many juvenile gasterias. The leaf surface is dark to grey-green, firm and smooth, and scattered with pale whitish spots that often run together into irregular bands.
Like all gasterias, it produces arching flower spikes carrying rows of pendulous, curved blooms. The flowers are swollen and stomach-shaped at the base — the feature that gives the genus its name (from the Latin gaster, "stomach") — and are typically pinkish-red fading to green at the mouth, appearing chiefly in spring and early summer.
Distribution and habitat
The species is native to the southern coast of South Africa, ranging from around Knysna in the Western Cape eastwards into the Eastern Cape, where it grows in coastal dune scrub and thicket, often within reach of sea spray. In habitat the plants nestle among shrubs and grasses that provide dappled shade and shelter, rooting in sandy, sharply drained soils, though they also occur exposed in full sun. This coastal, thicket-dwelling origin explains its tolerance of shadier positions than many succulents and its liking for a mild, frost-free climate.
Cultivation
Gasteria acinacifolia is one of the more forgiving succulents and a good choice for beginners. Grow it in a free-draining, gritty mix in a pot with ample drainage. Unlike sun-baking desert cacti, gasterias appreciate bright but filtered light; strong, unshaded sun can scorch the leaves to a bleached or reddish-brown, while too little light produces a loose, over-stretched rosette.
Water moderately during the warmer growing months, allowing the soil to dry appreciably between waterings, and reduce watering through winter when growth slows. The main risk in cultivation is rot from waterlogged soil or water pooling in the crown, so err on the dry side and keep the plant frost-free. Because it grows large, this species will eventually need a wide, heavy pot for stability; see Watering and Repotting for general technique.
Propagation
Gasteria acinacifolia is easily propagated. Although often solitary, plants may in time produce a few offsets ("pups") around the base that can be separated and potted once they have their own roots — see Propagation — offsets. It also strikes very readily from leaf cuttings: a whole leaf removed cleanly and left to callus will usually root and form plantlets at the base (Propagation — cuttings). Fresh seed is another option and useful for raising many plants at once (Propagation — seed), though seed-grown plants are slower to reach the species' full size.
Common problems
- Rot — the usual cause of loss, from overwatering, a poorly draining mix, or water sitting in the crown; affected tissue turns soft and translucent.
- Leaf scorch — harsh direct sun bleaches or browns the leaf faces; move to brighter shade or filter the light.
- Etiolation — too little light makes the rosette pale and loose, with leaves stretching and losing their firm form.
- Pests — mealybugs (white fluff tucked between the leaves) and, less often, scale and root mealybugs; see Pests and diseases.
See also
- Gasteria — the genus overview
- Soil and potting mix · Watering · Repotting
- Propagation — offsets · Propagation — cuttings · Propagation — seed
- Pests and diseases