Protecting recently planted trees from the winter cold

Queens don't winter real good. I had to cut a few down after last winter that had a light on them on the worst nights. Cover and use a high watt light on the worst nights. Beware of the long stretches below freezing too, not just the lowest temps. And take that cover off during the day if it will warm up any at all, especially if it's plastic. A lot of people do more harm than good covering them when they don't need it and leaving it on during the day when the sun is out. This can burn them, or course with a palm you can cut the entire top off without killing the palm, like you would other plants, to remove the burned leaves.

I don't know anything about palms, but you wont have to worry about the myrtles

Thanks for the responses. Any ideas where to get thick, cheap blankets? Goodwill maybe?