Kaskel hybridized and registered 75 daylilies between 1988 and 2005 in zone 10, near Miami, Florida. Of those, three are dormants, five are semi-evergreens and 67 are evergreens. All are tetraploids.
All of those daylilies should grow in zones 8, 9 or 10 in Florida, at least as far as the winter conditions affect growth and flowering.
Dormant means not growing. It does not mean without leaves. A daylily can have green leaves but be dormant at the same time (just like evergreen trees in winter in cold climates). Deciduous means without leaves (in winter typically).
There are two ways a daylily can be dormant. One way the daylily would absolutely require some days of cold weather to be able to grow again and in the other way the daylily would not require any cold weather to grow again.
If you grow daylilies in zones 8, 9 or 10 and you have cultivars that have dwindled each year after being planted I need your help. I'm looking for daylilies that absolutely require some days of cold weather to be able to grow again (for tests). I'm in zone 4 and so far I have not found any.
In my conditions basically all daylilies are dormant during the winter. If I dig up some fans after they become dormant in the fall and bring them inside into warm temperatures, with plenty of light so far they have all started to grow again - they did not need cold temperatures to grow.
If you can, please help by posting the names of cultivars that dwindled, old or new, diploid or tetraploid, doesn't matter.
