Rhododendron 'August Lamken', which is a Dietrich Hobbie hybrid documented as 'Doctor V.H. Rutgers' x R. williamsianum, has been determined to be a triploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
'August Lamken' is hardy in zone 6.
Summary of Ploidy Levels
Triploid 'August Lamken'
Source: John and Sally Perkins
John and Sally Perkins
