" Trees out of dormancy detest frost. An out of dormant mulberry can be more cold sensitive than a tropical fruit.
I even had a tree approaching 10 feet tall outright killed by a freeze when it was out of dormancy" josh on mulberrys Have pics of such things? shout out to people like josh and craig for putting in the work to research and share.
Note here about peach varities like earlier ones (what's that called ) do not always denote cold intolerance.
From this article: Pecans and Chilling | UGA Pecan Extension
One thing to keep in mind about the early arrival of cold temperatures last November is that normally leaves will move nutrients and carbohydrates back in to the tree as the leaves senesce in the fall. We had a hard freeze in mid-November when many orchards still had green, healthy foliage. Within just a couple of days after the freeze, the leaves were on the ground without having an opportunity to finish their job. As a result, trees could potentially be heading into the spring with insufficient carbs and nutrients. The first flush of foliage each spring is fueled by nitrogen stored within the tree and the tree does not begin taking up N until a couple of weeks after bud-break, which is why we normally recommend fertilization at that time. But this year, because the trees may not have the nutrient or carbohydrate supply they normally have, growers may need to consider applying N a little sooner, either just before or at bud-break.
also : What early-budding trees tell us about genetics, climate change – The Lode (mtulode.com)