Grow ardisia in medium to bright light. It also appreciates high humidity and thrives if you add moisture to dry air via a small humidifier or by setting the plant on a tray filled with sand or pebbles and water. Boosting the humidity level can prevent the leaf tips from turning brown.
Water ardisia enough to keep the soil moist, but not wet or saturated. That may mean once a week or so, depending on the size of the plant, the size of the pot, and how much light it receives. (The more light, the more water ardisia prefers.)
Fertilize ardisia a few times a year to keep it alive. It will grow faster and look lusher if you fertilize more frequently during the spring and summer months. Use a fertilizer formulated for houseplants and follow the directions on the packaging.