I am in the SE PA area...Phoenixville. considered "zone 6, or 6.5". I started gardening 2 years ago, planted 3 crepe myrtles. (Zone 7 - 10-0 degrees.) They were doing fine last year, but we had a brutal winter with prolonged temps close to zero, and this spring, as of 4/27, they are showing no signs of life. I know they are late bloomers, with flowers in August/september...but I'm thinking I should have at least seen buds or tiny leaves. All I'm seeing is bare branches with the little dry nubs where a bud should be. I'm wondering how much longer I should wait before declaring them 'dead' and planting something else...like a Cleveland Select pear tree. In other words, a kind of tree that I've already got in my yard, which has survived the winter just fine.