I have a quick question about overwintering, since we will be preparing for the colder months before we know it. A few trees I picked up over the summer (atlas cedar, hinoki cypress, nana) are supposed to be hardy during the winter months and survive colder temps for short periods of time (but I am not sure what that means - overnight, days, weeks). Right now, these trees live in our backyard in full sun (and we don’t have a cold frame or greenhouse). Will they be alright when temps start to drop into the 20’s overnight? We live in Colorado (Zone 5b), so our winters are mild compared to other regions (often getting into the high 30’s to 50’s during most winter days). Will these trees need extra protection? I plan to move our maples into our window wells. For conifers, I just worry that they’ll still need some sun (and the window wells can be dark). Any thoughts would be helpful.