"Zone" as in USDA Hardiness zones. We should all know what zone we are in because it is important for determining the hardiness of many plants. However according to this source below the USDA zones do not really apply to daylilies.
Go down to FAQ # 4
http://www.solarisfarms.com/Da...
I googled this assessment of USDA zones and daylilies and this was the only site I found stating this. Even university sites referenced USDA zones when discussing daylily hardiness. I could only find references to temperatures when determining USDA zones, and no particular plant types. Does anyone have any other sources for USDA zones applying only to woody type plants?
