On May 25, 2010, GardenGuyKin from Portland, OR (Zone 8a) wrote:
Genii survived the Winter of 2009, one week of below freezing weather and nights into the low teens. The remainder of 2009 & 2010 Winter was typical for this area. For added protection I mulched with oak leaves.
This plant has been said to grow in the following regions:
Dayton, Oregon Portland, Oregon Salem, Oregon South Prairie, Washington