Peace Lillies are thirsty plants and require watering regularly. If you’re not sure you should water your plant, poke your finger into the top of the soil and see if it’s moist. If so, hold off watering. If the under soil is dry, or almost dry, go ahead and water your plant. Give your plant a thorough water, ensuring the roots at the bottom of the pot get enough to drink. As with all plants, drainage is important, so make sure when you do water your Peace Lily, the water has somewhere to go so it doesn’t sit at the bottom of the soil and cause root rot or fungal problems. You will need to water your plant more often during the warmer months and less often during winter.