Akiva Silver wrote:I think that Colorado might be more suited to something like a nut pine than to a fruit tree, but I have never lived there.
For what its worth, I have seen American type hazel flowers survive temps as low as 5 f.
[T]hey have been through a +4° F freeze IN FULL FLOWER; with
no effect on the crop. That’s only 4° above 0°. I’ll say that again. Hard freezes have no effect
on the crop. Frequently they will flower in early April, with the ground still frozen; it's their
normal timing. This is hard to comprehend for people used to apples or cherries, where a
slight frost of +30°F during flowering can completely destroy the crop for that year.