It's time to pull them suckers!
I need to refresh the bed for spring planting. Plus, the leaves have begun to turn and even though I clipped off the flowers, they're flowering again, tenacious, reproductive brutes that they are.
I've read that the best way to harvest is leaf by leaf, only taking the yellowing ones, but that's it's also OK just to clip off the whole stalk and dry it like that. I'm going with the latter as I'm running out of time to do it the slow way.