Apolonija and Zlatica, many thanks for the reply, effort for passing on information. I will establish contact with Mr. Klenovšek and also with Mrs. Poljanškova. I saw the boundaries of the parcels for sale drawn on the real estate portal. When I went to check them physically too, I found out that the parcels where marsh gentian grows are right next to them and currently (still) not for sale. Still the area is fairly large and richly overgrown. Besides marsh gentians these parcels also have a rich stand of great summer bellflower. It would really be a shame if an ignorant hand destroys such plant wealth.