Differing Light Needs of Nepenthes ventricosa and ampullaria in Cool Conditions

A grower kept N. ventricosa (2) and N. ampullaria (1) in a cool garage (50°F, 45% RH) under fluorescents in wet sphagnum. N. ampullaria thrived; N. ventricosa blackened pitchers, no new growth.

Diagnosis

• N. ventricosa needs brighter light than N. ampullaria.
• Blackening pitchers = insufficient light OR poor aeration in 100% dried sphagnum.

Fix

• Repot into 1:1 dried sphagnum : perlite (or pumice).
• Increase light intensity/duration.
• Moving indoors to warmth needs minimal acclimation; just improve light and drainage.