I stand by my comment. I suggest that if you decide to continue to grow this noxious weed that you do so with great care. Although it will not kill your Droserae, it can and will spread by self sown seed. It will overwhelm any other terresterial Utricularia or pygmy Droserae species. Be sure to remove the flower scapes immediately after flowering, and never transplant moss from the pot into another. This is one CP I have come to hate with a passion.