What is Hoar Frost?
Hoar frost is a type of feathery frost that forms as a result of specific climatic conditions. The word 'hoar' comes from old English and refers to the old age appearance of the frost: the way the ice crystals form makes it look like white hair or a beard.
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Hoar frost on leaf - no, it's not weed!
Turns out "hoar frost" doesn't mean what I though it did,
I thought it meant, frosty weed you had pay for!