In addition to the other suggestions about where to get sand that is almost pure silica (rather than sandbox "play sand" or river or ocean sand, all of which contain other types of ground rock and minerals that can easily harm or kill carnivorous plants), the sand mined and sold for sandblasting ("blasting sand") is silica sand. I bought mine at a local home and building materials center. It comes in several grades. I bought #2, coarse.Originally Posted by [b
My own cephalotus (now a small colony) is planted in 1 part sphagnum peat moss to 2 parts silica sand in a fairly deep (about 8 inch wide by 6.5 inch deep) insulated foam pot, and his been growing very well, despite our very low humidity in eastern New Mexico, US. I take care to keep the crown dry, and I keep the medium drier than the sarracenias and sundews. Like others have said, and although I don't have a lot of experience with this plant, my feeling is that cephalotus likes to be planted in good air circulation above the rim of the pot (by mounding the soil or at least leveling the soil with the container rim) rather than sunk into the pot where the air can get a bit stale or stagnant. The extra sand in the medium I use helps to keep it from staying too wet too long.
Since I started this thread with a photo of my cephs at that time, I'll post a few followup photos of my cephs in a day or two. WildBill's suggestion to feed them Betta BioGold fish food has worked wonderfully. My cephalotus seem to love it and have grown very vigorously.
Cephs really are strange little plants, but very beautiful and interesting.
Steve / xscd