Increasing Humidity for Carnivorous Plants: Pebbles vs. Sphagnum

To raise local humidity in water trays, add pea gravel or small pebbles—they increase evaporation surface area. Long-fiber sphagnum works but quickly develops algae and mold in constant moisture, especially indoors. Pebbles stay cleaner.

Adding broad-leaved houseplants (philodendron, etc.) nearby also boosts humidity through transpiration.