hey look, I found someone using flax for a mattress!
I don't know if the OP to the homemade mattresses thread is still looking for homemade and natural mattress solutions. For my part, after deciding memory foam is my lower back's nemesis (and I don't feel too much better on spring mattresses) I've been racking my brain for a homemade mattress plan. Traditional foam mattresses, firm, are my favorite storebought mattresses, but I like the idea of natural materials.
My goal is to plant a patch of flax as soon as the rains begin later this year. I'll try and come back to this thread and post [if] any progress I make on this.