On Sunday 6. March 2011 the yearly botanists meeting takes place at the Landesmuseum Hannover from 10am to 5pm. The meeting is organized by the NLWKN Hannover-Hildesheim.

Dr. Jörg Petersen will hold a lecture about "Dactylorhiza sphagnicola und Hammarbya paludosa - aktuelle Bestandssituation in Niedersachsen".