As a gardener on the council it was one of our jobs. Planted thousands but I never got one to grow ;D
The orchids in one cemetery used to carpet the ground and we had to mow them down to keep the cemetery tidy, used to get loads of complaints. But we left them one year and they came up a bit thin the next year. Mowing them just before they turned made a better show.
We also had adders tongue which was one of the few sites that they grow in England. But when you think of it some of these old country cemeteries are really the only original meadowlands left.
If you ever come to the I.W. go to mountjoy cemetery, and see the cowslips, oxlips, ladyslipper orchids, bee orchids, and all sorts of old fashioned wild flowers and grasses. All left to grow wild and natural.