How does one propagate more comfrey? Just divide with a shovel?

Christopher Weeks wrote:Is that about what you'd do? Should I be breaking out smaller bits? How deep do you plant them? And should I retain the thin-side down orientation or plant them flat or what?

i’m definitely not responding soon enough to affect that comfrey plant, christopher, but i’d go smaller, personally. each of the rootless you removed into at least 2 pieces, i might get 6 more from the main central root. i tend to do my digging and dividing in  early spring, though this thread has suggested that’s not necessary.