Use relatively clean water such as rain, distilled or purified water. Tap water can be used in many localities if the water is low in salts. Low level chlorine does not seem to be a problem. Humid environments such as greenhouses, terrariums or even tents made from sticks and clear plastic bags can provide the needed humidity. Be sure to provide some ventilation to prevent overheating and stagnant air.
Many people put their plants outdoors during warm, humid weather.
N. fusca and N. sanguinea prefer cooler, but tolerate warmer culture. The lowland types are more tolerant of warmer conditions and usually are easier to grow. Most of the available hybrids are also in this category. N. x 'Dyeriana,' N. x'Chelsonii,' N. x'Williamsii', N. x'Ventrata', N. x'Superba' and other hybrids are usually the easiest to grow and have been selected for colorful pitchers. These contain tree fern fiber, chopped fir bark, long fiber sphagnum moss, peat moss and perlite.