Heliamphora like bright light. They may be grown with less light, but they will remain much greener. They can be grown outside in full sun, or indoors inside a terrarium under bright fluorescent or LED lights. More info about lighting is available here (Link).
The preferred method of watering is to use the tray method, keeping the soil damp to wet year round. Keep the soil cool by watering with cold water (kept in your refrigerator) on warm summer days. Always use mineral free water, such as rain, distilled or reverse osmosis water. More details about water can be viewed here (Link).
Temperature and Dormancy:
With the exception of the lowland form of Heliamphora heterodoxa, all Heliamphora come from high plateaus called the Tepuis (in Venezuela). It is cool and misty all year, so they require bright light, without ever heating up. Cooler nights are ideal. They may be grown on cool, sunny windowsills sometimes, but the best plants are grown in climate controlled greenhouses or terrariums where day temps remain in the 70’s F and night time temps in the 40’s to 50’s F.
Because of their need for temperature control it is recommended to grow them in light-colored, preferably white, plastic or glazed ceramic pots. Single plants grow well in six- to eight-inch pots. The bigger the pot the better, as the soil mass will help keep the plants/roots cooler.
Dormancy: No dormancy is required.
Use a mix comprised of mostly New Zealand long-fibered sphagnum moss with some pumice or lava rock mixed in. The mix should be airy and the rock ingredients will help keep the mix open and cool. They may be grown in live sphagnum also, but take care that it doesn’t overwhelm the Heliamphora. More information on soil mixtures for these plants is available here (Link).
FERTILIZER/FEEDING: Maxsea fertilizer can be applied monthly to the leaves and pitchers of the plant. Avoid contaminating the soil only applying to the leaves and inside the pitchers. More info about using Maxsea may be found here (Link), and is also available on my store (Link).