I used to have sorrel in my old garden and lovely as it is, it did become a bit of a pain and I was constantly pulling it up from where I didn't really want it! So yes, keep it in a pot and enjoy it! Actually, I'd rather forgotten about it since I don't have a plant in my present garden but now you mention it its something else for me to search out haha!!

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Life may not be the party we hoped for but since we're here we might as well dance