N. x ventrata Cultivation Guide
 

Hybrid Name: Nepenthes x ventrata
Parents: N. ventricosa x N. Alata (allegedly)
Highland/Lowland: Highland x Lowland
Man Made / Natural Hybrid: Natural hybrid
Country of Origin: Philippines (man made hybrids were first made in Japan)
Natural Habitat: Lowlands to Intermediate

Cultivation Guide
Lighting: wide range, 50% to Full sun
Potting Medium: Airy medium, cocochips, perlite.
Temperature: 20C to 38C
Humidity: 50% to 90%
Watering: Daily watering
Propagation: Stem cuttings

Remarks:
N. x ventrata is recently subject to several debates with regards to if it is really a natural hybrid and if the commercially available ones have only the ventricos x alata parentage, or maybe there are back crosses or even a 3rd species involved.

Most probably that the real natural hybrid will only have the two parents, while the man made hybrid that came out of Japan might have a back cross or a 3rd species.

The hybrid can take cooler climates like the ventricosa, yet tolerate warmer conditions like the Alata. It grows quite well and fast. Seems to tolerate a bit drier or well drained medium. Pitchers well.

Re: N. x ventrata Cultivation Guide
 

The easiest of the easiest hybrids. This can survive even without water for 1 whole week. It is very forgiving of growing errors. Mine grows in full sun, humidity 70-80%, filtered water and LFS.

Re: N. x ventrata Cultivation Guide
 

From what i've heard,the plants that we often see in the nurseries are deRoose's alata.

The parentage is (as what Arvin said) involves 3 parents which are (ventricosa x alata) x alata.

This clone is a female too.Cutting the pitchers and basals may encourage/force the plant to flower.(which i'm trying now).

Re: N. x ventrata Cultivation Guide
 

Ventrata...Easy though they like colder conditions since its actually a highland hybrid...If grown in lowland i think most of us realise that the pitchers get smaller and loose their colour..