Carnivorous Plants/Water quality


I have an intermediate sized collection of temperate sundews, Venus flytraps, and sarracenia. They are in several large trays, so buying distilled water has become a hassle and an expensive thing after a while. I tried to be careful, since I have well water. I eventually bought a tds meter to test the ppm in my water and continued to test it and I got about 42-43 ppm. I read in your care instructions that they can have 50ppm. The only problem I have with using my own water is the mineral build-up on the soil. Would I just need to rinse it off every once in a while, or do I need to get back to buying distilled water?

Hi Jarred,

Your water is right in that gray zone.  If you could rig a way to only top-water your plants, it would be fine.  What happens when we tray water is the minerals concentrate in the soil as it draws the water up and evaporates.  If the water is passing through the soil, it won't concentrate the minerals.

An intermediate option to the distilled water, you might consider a ZeroWater filter.  Since your water isn't that hard, that type of ion exchange filter would last quite awhile.  Here's a link:  There also some moderate priced Reverse Osmosis units out there.  You would need to do a web search to see what would work for you.

Good Growing!

Jeff Dallas
Sarracenia Northwest

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