There have been five or is it six frosty nights out here on the high desert. Do you know that when basil freezes it almost completely disappears. It is tough on geraniums, peppers and tomatoes also. After the first night, of course, I covered everything, but sure too late for the basil. It has not dropped too low, however, so the overall damage is minimal. Many times in June it will go to 20 degrees or so, that is really hard on the garden, and it may yet. But I still have apples!