Focr previous ten years' information, see: Cold Hardiness 2017-2018 Cold Hardiness 2016-2017 Cold Hardiness 2015-2016 Cold Hardiness 2014-2015 Cold Hardiness 2013-2014 Cold Hardiness 2012-2013 Cold Hardiness 2011-2012 Cold Hardiness 2010-2011 Cold Hardiness 2009-2010