Today is the first day that was cold enough to make frost flowers! ❄️
Paraphrasing info from weather dot gov:
Frost flowers are thin, extruded layers of ice that form around the stems of wingstem plants (and some other kinds). Their formation requires freezing air temperature, soil that is moist but not frozen, and a plant with a stem intact enough to still move water. The water in the stem is drawn upward by capillary action from the ground. It expands as it freezes and splits the stem vertically, then freezes on contact with the air. As more water is drawn from ground through the split, it produces a paper-thin ice layer that spreads from the base. The length of the split determines if the frost flower is a narrow or wide ribbon of ice. It curls unpredictably as it is extruded, perhaps from unequal friction along the sides of the split, to form the "petals." These flowers, no two of which are alike, are fragile and last only until they sublimate or melt.

















