Peace lilies generally need to be watered about once a week, but the exact frequency depends on factors like light, temperature, humidity, and pot size. Here are key points on how often to water a peace lily:

• Water roughly every 7 to 10 days if the soil drains well and conditions are moderate. In warmer, drier environments or during active growth, watering may be needed every few days

• In lower light or cooler, more humid conditions, watering can be less frequent, about every 10 days or so

• The best practice is to check the soil moisture regularly: water when the top inch or so of soil feels dry or lighter in color. Avoid letting the soil dry out completely or stay soggy

• A typical amount is about one inch of water per watering, enough to moisten the soil until water drains from the pot’s bottom

• Use purified or rainwater if possible, as tap water can sometimes harm peace lilies

In summary, water your peace lily about once a week, adjusting based on soil moisture and environmental conditions to keep the soil consistently moist but not waterlogged.