Humidity Trays for Nepenthes in Utah: Tap Water Is Fine

A Utah grower with very low humidity asked whether to use tap or distilled water in a humidity tray/humidifier for a new Nepenthes.

Jeff Dallas said: as long as the plant doesn’t absorb the water into its soil (i.e., not a water tray), tap water is fine—even with high minerals. Evaporation leaves minerals behind. Nepenthes are the least mineral-sensitive carnivorous plants.