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On no, don't kill the nettle. Even though it is prickly and painful, it is quite good to eat. All you have to do is boil it till it softens then use it like spinach. All the prickliness goes away after boiling. Lots of recipes online.

I've actually been told that by several people but have never tried it. I really need to give it a go, especially since I have a hole crop of it in the backyard. Ive heard that you can make tea out of it as well.