Question
I am trying to grow Cape Sundews in Coconut Fibers that i got for my hermit crabs at Petco.

Answer
Hello Lewis,

I would avoid the simulated peat products as those may contain substances the plant cannot tolerate, like minerals and salts. The only substance that most varieties of carnivorous plants have been proven to safely grow in is sphagnum peat moss with a 50/50 mix of perlite or horticultural or silica sand added in for drainage. Avoid small bags of peat moss in stores as those usually contain fertilizers that harm carnivorous plants. Go for the big dry bales of sphagnum peat moss from nurseries and use only dry unfertilized perlite or sand. You can buy these products ready mixed and used specifically for carnivorous plants at sites like cobraplant.com.

Christopher