If you want to try them, even from an area that might be polluted, you really need to take a small bit of root, grow it in a bucket or basin of rainwater and just leave it in peace somewhere light to grow. The new roots, seeds, etc., will be fine, discard the original piece.
I grow 2m high reedmace in a small 15" deep pond in the front garden food (starch, shoots, pollen) firelighting, cordage, & basketry all in one plant useful stuff
cheers,
Mary
I grow 2m high reedmace in a small 15" deep pond in the front garden food (starch, shoots, pollen) firelighting, cordage, & basketry all in one plant useful stuff
cheers,
Mary