Bracken tea for ericaceous feed

in Fruit & veg
Hi, I saw someone mention bracken tea and I was wondering if this would make a good feed for my blueberries? I know I can buy feed but we have a local abundance of bracken, plus I'm cheap, and if it might work then I might as well use it.
Thanks
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When you don't even know who's in the team
S.Yorkshire/Derbyshire border
https://www.gardenersworld.com/how-to/grow-plants/how-to-make-a-comfrey-feed/