Carnivorous Plants/LOCAL HUMIDITY


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.

Good Growing!

Jeff Dallas
Sarracenia Northwest

---------- FOLLOW-UP ----------

QUESTION: Could I use long fiber sphagnum moss instead of pebbles? The type of moss I'm talking about is used as a nepenthes substrate.

Hi John,

You can use long-fiber sphagnum.  It quickly gets both algae covered and often molds when constantly wet, especially if it's in a house.  Pebbles tend to be cleaner.

Good Growing!

Jeff Dallas
Sarracenia Northwest

Carnivorous Plants

All Answers

Answers by Expert:

Ask Experts


Sarracenia Northwest


If your carnivorous plant is showing poor growth, discoloration, abnormal leaves or possible infestation, the expert growers at Sarracenia Northwest can help! They have a great depth of experience dealing with diseases, pathogens, and abnormal growth in carnivorous plants.

Before submitting your question, please read their care guides on their main website. Many issues can be addressed by simply adjusting your growing conditions as recommended in the care guides. Click here to read the care guides.

Over 9,000 questions answered since 2005!


Jeff and Jacob are owners and growers of Sarracenia Northwest. They've been in business since 1995. Watch their professionally produced DVDs, Grow Carnivorous Plants. It is a three-volume set that covers all aspects of carnivorous plant care. They literally show you how to be a successful grower!


No terrariums. No myths. No nonsense.
Just the straight facts from guys who grow and propagate
thousands of carnivorous plants each year.

Our focus is to help help growers diagnose a specific plant problem and offer solutions. For example:
  • Why is my sundew not producing dew?
  • Is now a good time to divide my Sarracenia?
  • Why are the traps turning black?
  • What's a good substitute for perlite?
  • Why didn't my seeds germinate?
  • How do you deal with pests?
  • Can you identify this carnivorous plant for me?
We no longer answer general, how-to questions that are already posted on our website or demonstrated in our DVDs. For general plant care, please read our care guides:

For business questions:

Youtube Facebook
Follow us on Youtube and Facebook!

©2017 All rights reserved.