Haworthia glabrata 点纹十二卷

Light: Bright light, but not direct sunlight. These grow in similar conditions to other 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 waterings. In the winter, reduce watering to every other month.

Never allow water to collect in the rosette.
Temperature: Warmer summers but cool in the winter (down to 50˚F).

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: Haworthia can be propagated at repotting time using offsets from the mother plant. 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, put it a warm, bright spot, and make sure to adequately water.

Repotting: Haworthia are small (usually remaining between 3″ and 5″ in height) 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.

From http://houseplants.about.com/od/succulentsandcacti/p/Haworthia-Growing-Haworthia-Succulents.htm