1）Put the sansevieria plant in an east, west or north windowsill any time of the year. If it's a south-facing window, place the plant about one foot from the window, to the side, year round. Use the sheer drapes to filter intense sunlight during the day. Turn the pot quarter turns weekly for even light exposure.
2）Keep plants in temperatures between 40º and 85ºF (4.4 to 29.4 C).
3) Water when hydrometer reading almost zero or when dry to prevent root rot. Water very little in winter or in a cool air-conditioned room. Use room temperature water.
Use distilled or rainwater if possible. If using tap water-- allow it to stand for at least 48 hours to dissipate chlorine, fluorides etc. If possible, one week is better.
Water along the sides of the plant. Try to keep water out of the center of the leaf clump. Water until water drains from the bottom and empty drained water from trays promptly.
4) Fertilize sansevieria plants once in the spring with houseplant fertilizer mixed according to label directions.
Fertilize in spring with a 20-20-20 fertilizer mixed in a watering container.
5) Wipe the leaves of sansevieria with a damp cloth if they get dusty.