Frost bubble formation

I think this is a frost flower, crystallofolia, closely related to hair ice.

They can appear quite similar to the above photos.

Pluchea odorata — Marsh Fleabane — Mown Stem on Path December 25, 2007 &mdash 26° F — N. Hays County, Texas enter image description here

Capillary action sucks up water from cracks in plant stems or just water present inside wood, freezing as it gets exposed to air. This makes more water arrive, displacing the ice outwards forming long petals along cracks, ridges or other structures. A lot depends on cracks forming in the right directions and supplying water at the right rate.


Did you recently spray Herbicide on your garden? The Herbicide may have formed a sort of film overnight that allowed frost to freeze onto it.

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