Back when I had the mail-order nursery I had a mess of carnivorous plants in the greenhouses. Got the TC plugs from this place.
http://www.ag3inc.com/Uploads/availability.pdf
Also a local fellow has some cool and hot greenhouses, and has all the known species of Nepenthes. Evidently when collectors go to remote regions of the world collecting new living specimens for botanical gardens, he receives whatever they find first, figures out what they require for culture outside their native environ, and then propagates and distributes to the botanical gardens. Crazy place, only about 3 acres, it's easy to assume that's lawn you're standing on until the magnifying glass comes out and the guilt sets in.
There's a few old accounts of the peat lakes in a few counties in the south where the rotting sphagnum moss at the bottoms of the lakes would fill up with methane gas and lumps to huge chunks of it would float to the surface, and on these 'floating islands' is where the Venus's Fly Traps would grow abundantly. However, because of over-collecting to satisfy the interest in them, these places still exist, but nothing is growing on the floating lumps of peat. (rotted sphag moss = peat).
Now having said all this, the best peat for culturing Nepenthes, Butterworts, Flytraps & Sundews is, ironically, European (where none of these species is endemic to). A company called 'Prosource' used to carry it, not sure of the package label name, someone at Agristarts told me about it.
Notes on water.
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