PICTURES: Ice petals flower in woodland at Hardcastle Crags, Yorkshire

Rangers and volunteers at Hardcastle Crags, west Yorkshire, were treated to a rare spectacle last week as ice “petals” covered branches in woodland on the National Trust estate. 

Frost sculptures

Rangers and volunteers stumbled across these ice sculptures on dead wood at Hardcastle Crags, Yorkshire. Credit: Natalie Pownall/National Trust

Natalie Pownall, 25, National Trust Academy Ranger at Hardcastle Crags, said: “We were walking through the woodland at Hardcastle Crags with our conservation volunteer party, when we saw all these glittering white gems littered on the woodland floor. At first I thought they were fungi – but on closer inspection they turned out to be ice. 

“The ice formations are caused by water in the wood freezing. The water expands out of the logs, creating the beautiful ice ‘petals.’ 

“Most of these ice petals formed on the dead logs that we’ve left on the woodland floor after our woodland conservation work. One tree, which we felled last year, was covered in the ice fungi. Dead wood can also be an important habitat for invertebrates like beetles, birds and fungi. 

“You’ll often see these ice formations if the conditions have been below freezing and clear for a couple of days. Normally they melt away as soon as the sun comes up, but because our wooded valley is north facing and doesn’t get much sun we can enjoy the frost flowers all day long.”

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4 thoughts on “PICTURES: Ice petals flower in woodland at Hardcastle Crags, Yorkshire

  1. Pingback: A CERTAIN MEASURE OF PERFECTION

  2. This is the phenomenon known as Hair Ice. It’s produced by a fungus called Exidiopsis effusa, whose mycelia force water out of dead twigs. When the air temperature us below freezing, and the ground / twig temperature above freezing, the water freezes into hair-like strands, probably due to a chemical inhibitor.
    Last winter was so mild I don’t think anyone noticed Hair Ice outside upland regions and the far north…

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