Water Quality for Nepenthes Ventricosa: Distilled, Rain, RO, or Tap?

Low-Mineral Water Is Essential

A new N. ventricosa owner asks what water to use and how to make it.

Acceptable Water Sources

Distilled, rainwater, and RO water are low in minerals. Tap water may work if naturally low-mineral (e.g., Portland, OR). Nepenthes tolerate up to 200 ppm dissolved minerals. Test your tap water; if <200 ppm, use it but ensure complete drainage—never let pots sit in water. If >200 ppm, flush monthly with distilled water.

See our care sheet: https://www.cobraplant.com/caresheets.

Good growing!
Jacob Farin