Actually, the term is more correctly frost bitten Japanese Indigo! I admire it so much I must share Riihivila’s efforts in Finland on more exploring with different variations of dried indigo based on John Marshall’s Dried Japanese Indigo recipe in his latest publication.
Riihivila takes advantage of a late freeze to explore here…
http://riihivilla.blogspot.fi/2015/10/dyeing-with-frost-bitten-japanese.html
So, if you live somewhere early frosts are threatening your late season JI, consider this exploration.
No photos in my blog today but jump over to Riihivilla’s blog and enjoy her photos.
debmcclintock 
Interesting idea. It’s not luckily something I have to deal with here but for those who do have to, it’s a great solution if you left picking too late. Kay
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Thank you Deb, I couldn’t have done this experiment without your posting about dried leaf dyeing.
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I read Leena’s article as soon as she published it. She is just incredible!
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THank you! This may come in handy in the frosty high desert of Southern Oregon.
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