Gasteria is a relatively rare, Aloe-like succulent. The genus is native to South Africa, where they grow in lightly shaded conditions with excellent drainage. As a result, they are adapted to relatively lower light conditions than some more well-known succulents and are good houseplants.
Light: Bright light, but not direct sunlight. These grow in similar conditions to Haworthia succulents. White or yellow leaves usually signify too much sun.
Water: Water evenly and generously in the summer, letting the soil media dry out between watering. In the winter, reduce watering to every other month, but do not stop watering. Never allow water to collect in between the leaves.
Temperature: Warmer summers but cool in the winter (down to 50˚F/10˚C). During warmer weather, your Gasteria leaves might turn a lighter, brighter color or the plant might flower with small, colorful sac-shaped flowers.
Soil: Use a cactus mix or very fast-draining potting soil mixed with sand.
Fertilizer: Fertilize during the summer growing season with a cactus fertilizer. Don’t feed during the winter.
Propagation: Gasteria can be propagated at repotting time using offsets from the mother plant or from leaf cuttings, depending on the species.
When taking offsets, use a sharp knife or snippers and cut as close to the mother stem as possible to including as many roots as possible, then allow the offset to dry briefly before repotting it (similar to cuttings from other succulents). Pot the offsets in a small pot, using the same soil as the mother plant, and put it a warm, bright spot and make sure to adequately water.
Repotting: Gasteria are small, shallow-rooted, and relatively slow-growing. They are often grown in small clusters in wide, shallow dishes. Over time, clusters will naturally enlarge as the mother plant sends off small plantlets. When the cluster has outgrown its dish, repot in the spring or early summer into a new wide and shallow dish with fresh potting soil. This is also the time to take offsets for propagation.