Limitations and Possibilities for Growing Native and Exotic Maples in Poland. By Jerzy W. Tumilowicz, Warsaw Agricultural University, 
Rogów Arboretum.
This article, reintroduced from the 2002 International Maple Symposium Proceedings, will by of great use to all growing maples in the challenging colder climate zones. Prof. Tumilowicz tracks hardiness for 74 Acer species growing at Rogów through severe January conditions, with an average temperature of -12.4°C (9.7°F) and a minimum of -31.3°C (-24.3°F).
