Druid? Like the guys with the standing stones, shaved heads, funny robes?

( Pot, kettle, black. The comment is flippant, but he follows it up with more sobriety: ) That would be excellent, actually: the infirmary always needs more curative herbs and we’ve been intending to grow our own this season, once the winter warms up a bit. But I have the opposite of a green thumb. Kept accidentally killing the rooftop garden back home.

Do you have any experience with growing elfroot?