I have started an experiment!
I noticed that in many of the photos of D. filiformis growing in the wild the plants are growing in pure silica... But in cultivation, people grow this plant in varying substrates such 1:1 peat:silica, sphagnum, etc.
So, what I have done is potted three Drosera filiformis "florida all red" seedlings in seperate pots in different substrates.
I want to see if the substrates most commonly used in cultivation work better, or if the pure silica substrate like in the wild works better.
here are the plants:
Pure silica, thoroughly washed
Pure live sphagnum moss
1:1 Peatmoss:silica, both peat and silica was washed
I have fed all of the seedlings about 4 days ago. I am growing them all in the same terrarium:
My only worry is that the silica will form some kind of slime mould on top of it, but since I washed it I'm hoping it won't be a problem.
I water the silica pot by lightly misting the top; I don't have a hole in the bottom because I don't want the sand to fall out.
I hope the experiment goes well!