Freeze protection 2014
You probably saw earlier thread about 23F freeze 4-14-14. It didn't take a whole lot to avert the damage. The apricot still green was covered with two layers light blankets and a 40W shop light. The frozen trees are apricot, peach, and nectarine.
Damage was severe on this 4th leaf Sugar Pearls apricot uncovered.
I covered several things but ran out of heat sources. Damage was severe on all those plants.
Apples and pears uncovered showed no damage except to fruit. Pecan, persimmon, jujube, mulberry, and grapes were toast unless covered plus heat.