I too am experimenting with substrates. I've used straight coco fiber in the past as well as a 50/50 mix of coo fiber and top soil. I really like that mix, it packs well and retains moisture well. However there are too many "sticks" to be of much use for slings.
I've decided to sift the top soil to get a finer grade of dirt. I'll try the fine dirt and coco mix with slings soon.
I've decided to sift the top soil to get a finer grade of dirt. I'll try the fine dirt and coco mix with slings soon.