Hi, I need some hasty advice. In about two hours, the sun will be setting. Tonight, in New Hampshire, a killer frost is forecasted. My apple trees are in blossom. Should I attempt to cover the trees for tonight? Will a frost kill the blossoms, and disrupt the trees' fruit production? I also have a pear in blossom as well..... Also, I have quite a few two year old fruit trees and bushes...six blueberries, two mulberries and one cherry...should I get out there and cover them as well? They aren't in blossom, but the leaves are budding out.