Posted: 07/06/2016 at 21:01
The star-shaped growth on the soil surface is liverwort which indicates poor drainage and is probably essential for your orchids to thrive. The lilies will probably die in those conditions but I'd sooner keep the orchids!
The poor drainage would also make the Marsh orchid the most likely suspect as has already been suggested.
Last edited: 07 June 2016 21:03:49