How to divide fargesia?
I have a clump of fargesia from which I would like to take some divisions. Do I have to dig up the whole clump first and then divide? Is there any other way to do this? Is there a general guideline on the minimum number of culms and new shoots in a division?
Additionally, since fargesia have new shoots almost continuously throughout the growing season, when is the best time to do this in zone 7? Thanks!