Cottonwood frost damage -Prune?
Hello all. New member here. I planted a 7' tall Cottonless Cottonwood tree late last summer. In early spring it appeared to product small, gray buds at the ends of the branches. March and April were warmer than usual, then we had several hard frosts, and snows. The small branch ends, and buds are still gray in color, but are somewhat shrivelled, and the buds did not leaf out. The tree has produced less than a dozen full size leaves low on the trunk, and is even creating what looks like a sucker from about a foot up the trunk. This grow is where no branches were. The upper, non-producing branches are still somewhat flexible. Should I prune the ends of the upper branches, cutting off the "dead" buds? Will thi encourage new growth in the upper part of the tree? Or, should I just leave it and hope for recovery next spring?