FAQ
Common questions
Can I use tap water for carnivorous plants?
In most cases, no. Tap water contains dissolved minerals (calcium, magnesium, sodium) that accumulate in the soil and slowly poison carnivorous plants. You need water under 50 ppm TDS. Distilled water from a grocery store is the simplest solution at about $1 per gallon. Use a TDS meter to test any source before using it.
Why did my Venus flytrap die?
In order of likelihood: tap water killed it, regular potting soil was used, fertilizer was applied, it was kept too dark, or winter dormancy was skipped and the plant exhausted itself. The good news is all of these are fixable with the next plant.
Do I need to feed my carnivorous plants?
No. A plant near a window catches enough insects on its own. If your plant is in a sealed indoor space with no insects, you can offer a small live insect every few weeks. Never feed hamburger, cheese, or fertilizer; those rot the trap. A plant that never catches anything will still survive, just grow more slowly.
What is dormancy, and do all carnivorous plants need it?
Dormancy is a rest period triggered by shorter days and cooler temperatures, during which the plant slows or dies back to its roots. Venus flytraps and North American Sarracenia require 2-4 months of dormancy (below 50 degrees F) to survive long-term. Many tropical Drosera sundews and all Nepenthes do not require dormancy, making them better choices for indoor growing without a cold space.
Can carnivorous plants live indoors?
Some can, some can't. Drosera sundews and Nepenthes are naturally indoor-friendly and thrive under grow lights. Venus flytraps can live indoors near a south window in summer but need a cold dormancy period in winter. Sarracenia pitcher plants do best outdoors and struggle as permanent indoor plants.
What soil should I use for carnivorous plants?
A 50/50 mix of unfertilized Canadian sphagnum peat moss and horticultural perlite. That's it. No regular potting soil, no Miracle-Gro, no bark, no added fertilizer. You can buy premixed carnivorous plant soil or make your own with two bags. This is the second most common beginner mistake after tap water.
How much light do carnivorous plants need?
Most prefer 4-6 hours of direct sun or 14-16 hours under a full-spectrum grow light. A south-facing window in summer usually works well. In winter or without a good window, a $25-40 LED grow bulb on a timer makes a real difference in plant health.