Water your Impala Lily during the growing season, so that the soil is uniformly moist as deep as 1 inch. Since this type of plant is accustomed to drier regions, it does not require much water. Reduce the amount of water that you give your plant during the winter months.
To check the water levels of your plant’s soil, place a water meter 1-2 inches into the soil, where it will give you an accurate indication. If you do not own a water meter, stick one finger knuckle-deep into the soil. At this depth, you will be able to accurately account for the soil’s level of moistness.