Viewing post #1071572 by needrain

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.

What Maurice is saying makes a lot of sense to me. There are a lot of plants that don't survive the summer heat in my location here in Texas. Oriental poppies are a good example. I've tried them many times and they will grow well in fall, winter and spring and then the summer takes them out. Some of the big fancy alliums and many varieties of daffodils behave the same way. Many, many plants suffer in the summer here even when they can survive it.

As for the daylilies, I may be testing the theory since I'm acquiring some northern bred daylilies. Last summer was not typical and what I do have did fine. I'm growing dor, sev and eve types and so far I can't tell any difference in growth/bloom between them. There is more growth difference between tets and dips in that so far tets are much slower to increase. At the same time they tend to have larger fans and appear healthy.