I'm really happy I found this thread after a few months of mostly ignoring the forums. The most gruit-related stuff I've done is "dry hop" some yarrow, wild bergamot, and sage in a cider, it was not the best pairing but certainly unique. I picked some more herbs and dried them (yarrow, mugwort) but never got around to using them, and have gotten the itch to jump into beermaking. A gruit mead or braggot has now been added to the very long list of things I want to brew, as well.
I'm particularly grateful for your article (
https://denardbrewing.com/blog/post/gruit-mead/) spelling out some boil times and dosage for gruit herbs. I've seen a number of recipes with mixtures of herbs, or general guidelines, but not much specific that's backed up by direct experience.
A few months ago I compiled a bunch of info from various sources about gruit herbs and other herbs in brewing. I never really "finished" it (a lot of the information is absent or imprecise, namely suggested dosage) but I suppose it's a good time to go ahead and share it. If people are interested on contributing / correcting I can open it up to editing:
https://docs.google.com/spreadsheets/d/1l4ZiEjVXSSoo0-9bUx0L4l2wrwqc532_GYO-_O7FBfQ/edit?usp=sharing
(Don't forget to scroll to the right to see sources and some guidelines)
If something is marked with "?" as a source it's probably just something I cobbled together from wikipedia or random mentions of someone putting that particular herb or spice in some sort of brew, so don't take it too seriously.
Also, if you want a commercial gruit sample, I don't know of any meads but Beau's brewing in Vanleek Hill (near Ottawa up here in the frozen wastes) has an entire series of gruit beers: Bog Water is one of my favourite beers in existence and I have a bottle of Original Gruit waiting to be tasted.