admmad said:
I think northern bred "dormants" will have a tendency to be unable to survive high southern summer heat stress rather than needing cold during winters.
So it is unlikely that daylilies hybridized in the north (without the input of southern-selected plants) would be good candidates for high heat southern gardens. Typically northern hybridizers would produce more "dormant" than evergreen introductions and so those plants would not grow well in the south but not because they are "dormant" but because they cannot handle the high heat stresses.
I would think that good examples of northern-bred lines that cannot handle high heat stress of southern locations would be introductions hybridized by Burkey, perhaps Hite, etc.
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