Haworthia (Zebra Plant ) in decorative a glass container. The glass container can also be used Tea-light. Care Instructions Moderate Light Levels Avoid direct sunlight and very shady areas. Moderate Watering Once a week or so in Summer and once every two weeks in Winter. Temperature Normal indoor room temperatures. 10°C (50°F) to 29°C (85°F) Feeding Try to fertilise once every three months when it's growing.