Keep peace lilies in bright, indirect light – near a window but not in direct summer sun – to ensure strong growth and flowering. Plants will survive in deeper shade but will rarely flower and will grow very slowly.
 
Average room temperatures are fine, anywhere between 12–24°C (55–75°F), but keep plants away from hot radiators and cold draughts.

Planting

To repot, select peat-free multi-purpose compost and mix in perlite to improve the drainage – ideally at a 3:1 ratio. The new pot should be only a few centimetres larger than the current one, to avoid overpotting. Using a much larger pot can mean the excess compost stays damp for too long, potentially leading to root rot. 

Watering

Water peace lilies throughout the growing season, from April to October, once the top few centimetres of compost have become dry. Reduce watering slightly in winter when growth slows down. The fluoride in tap water can damage the foliage, so use rainwater or filtered water whenever possible. If the compost dries out very quickly after watering, this may be a sign that your plant is rootbound and in need of a larger pot. Repot it in spring.

Humidity

Peace lilies prefer moderate humidity – their leaves may start to turn brown if the air is too dry. So stand the pot in a saucer over a tray of damp gravel – the water will slowly evaporate, raising the humidity around the plant. You can also mist the leaves and/or wipe them with a damp cloth regularly. Bathrooms are good places to keep them as they absorb the moisture from the steam through their leaves