We had a very mild autumn, but last time we got our first truly hard frost. It went down to 27F last night, and the humidity was high enough for some fairly spectacular frost this morning.

In addition to the lovely gallery of Jack Frost’s work in the garden, there was a special treat close to the road: a frost flower. These are formed of fine tendrils of ice extruded from dead/rotten sticks when conditions are just right. It requires the perfect combination of temperature, moisture content, and pores in the wood.

This isn’t an especially spectacular example in terms of form, but the hair-like crystals were close to an inch long.

Frost flowers can be very beautiful. This is one we saw near the Elwha River almost four years ago. It was one of more than a dozen frost flowers we saw at that location, and the most picturesque. It was the first time we had ever seen them, and the conditions at the old campsite must have been perfect to have so many in one spot.