Question QUESTION: What things can I put in the bottom of my tray to increase local humidity for my CPs?
ANSWER: Hi John,
This is typically done by putting small pebbles such as pea gravel in the tray. As the water evaporates, the rock increases the surface area exposed to evaporation. You can also increase local humidity (I'm assuming you're trying to do this for Nepenthes; you didn't say what you were growing.) by adding other houseplants to the area such as Philodendron and other big leaf plants.
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