>>1034423It is only poisonous if you eat it. The reason you wait until winter is because it needs to be dead and dry inside. That strengthens the fibers and makes it far easier to extract the fibers. It is still a real bitch to work with if you are unaccustomed to that sort of thing. Getting enough of it can be a problem, so make sure to collect and sow as many seeds as you can in places it will grow well.
>>1034385Many plants. What part of the world will you be sourcing your cordage plants from? That helps research.