Propagation
Sow fresh seed during spring and maintain a temperature of 19º to 27º C. (66º to 81º F).

Take cuttings during spring with 2 to 3 leaves.
Air layering carried out during summer.

Culture
When growing Nepenthes alata in containers apply high nitrogen fertiliser weekly during the growing period and under glass grow in slatted baskets with a loam-less potting mix of sphagnum moss and peat. 
Place in a bright indirect light, humid position and reduce water during winter. In spring prune shoots back by one third to encourage new pitcher growth.

Botanic information
Leaf: The leaf may or may not produce a pitcher that appears from the apex of the leaf on a spiralled tendril. The pitcher is cylindrical at the top and bulbous at the base, up to 120 mm (5 in) long. The lid is elliptical and the colour may be flecked red.

Flower: The male and female flowers are found on different plants and have small sepals that fold back revealing a protruding style. The small greenish flowers are arranged in a spike-like raceme and the flowering period may vary in tropical climates but normally appear during summer.

Fruit: The leathery textured capsule contains seeds with a hair-like growth and are dispersed by wind. The small seed is not commonly seen and the plant is normally reproduced vegetatively.

Note:
The pitcher is produced at the tip of the leaf from an extended mid rib, but not all leaves produced pitcher usually because of environmental conditions such as a lack of light or humidity. 

The young pitcher has the lid closed and as the body inflates fluids acuminate inside the base. The new pitcher has weak walls that harden over a few days and the lid opens. When the pitcher captures insects the lid remains open as its job is to continually attract the insects with the nectar glands at its base and to stop rain from filling the pitcher. 

The inner rim has down pointing teeth and below it has a smooth glandular surface from which the insect can not climb out of. Digestive fluids are found at the base of the pitcher and these absorb the trapped insect.