Gasteria pulchra aka Pretty Oxtongue

Gasteria pulchra is a succulent perennial from South Africa. Kew places its native range in the southern Cape region. LLIFLE records it in the Eastern Cape. It belongs to the Asphodelaceae family and grows in a subtropical climate. Its common name is cow tongue. Plants grow upright, either alone or with offsets. These young shoots can soon build a close clump.

The stem stays very short beneath the upright leaves. Each rosette can hold up to 15 leaves in near-opposite ranks. The stiff, narrow leaves reach 0.7–1 foot (0.2–0.3 metres) long. Their upper sides are flat, while their undersides are rounded. Some have two ridges below. Leaf colour ranges from grey-green to dark green. Strong light can bring out red tones. Cream-white spots cover the glossy surface and may form uneven bands. Some spots feel smooth; others form small bumps. Pale, firm edges lead to sharp leaf tips. Plants differ in leaf shape, markings, and growth habit.

Flowers appear from spring into summer on tall, upright stalks. These reach about 3 feet (0.9 metres), sometimes 4.9 feet (1.5 metres). LLIFLE describes orange to pink-red flowers with green lines along the petals. Chicago Botanic Garden also lists pink, salmon, and white blooms. The foliage and tall flower stems suit use as a specimen. The plant also suits windowsills, verandas, small succulent gardens, and outdoor rockeries.

LLIFLE rates this species as easy to grow. It grows fairly fast and makes offsets freely. Its guidance favours shade or light shade, with some direct sun. Chicago Botanic Garden lists full sun through partial shade. A loose potting mix that drains freely helps protect the roots. Non-acid soil suits it best, though it accepts varied soils. Shallow pots work well, and plants can stay in small containers for years.

Watering needs change with the season. Keep the soil slightly moist in hot summer weather, without soaking it. In winter, wait until the soil dries fully before watering. Trapped water can cause root and stem rot, most of all in cold weather. LLIFLE also calls for low air humidity and good airflow. Feed once during growth with a balanced fertiliser at half strength. Chicago Botanic Garden lists USDA zones 9–11. LLIFLE reports frost tolerance near −1°C, but gives no firm lower limit.