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http://forums.gardenweb.com/forums/load/shade/msg1005511610992.html

They are zone 5-9, so it depends on your region, but they should be mulched/protected in the harsher zones over the winter.

Zone map - http://www.hollandbulbfarms.com/Images/zones_2006.gif

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16y ago

What else can I help you with?