Here are some photos of frost damage, (and no damage,) following 6 days and nights of below 10F. The sustained cold with a slight breeze in very dry ground was different than previous cold years. We only got above freezing for about 4 hours every day for about 10 days and were below 20F from about 6 pm to 9 am.
Several of the perennials that are under the cover of trees felt pretty badly about the cold.
Many of the leaves froze on the bushes and trees.