Snake plants are very easy to care for an do not require as much watering as some other plants do.
When you need to water your snake plant you can tell when the snake plant needs watered when the soil that the snake plant is planted in becomes completely or almost dry.
Snake Plants need watering every 2 to 6 weeks and it depends on the humidity level of your home as well as the temperature and light levels in your home.
As long as your watering your snake plant every 2 to 6 weeks or when the soil becomes dry then you're watering it enough.
Avoid over watering the snake plant because over watering the snake plant can cause root rot which can kill the snake plant.