We had 3 pots of tropical Agapanthus (must check out the one that supposedly is hardy in my Zone) that have been my wife's responsibility for the past 30 years. One bloomed this year, other 2 have not bloomed in about 7 years. So my wife gave up and asked for my help. She has repotted them over the years, but they were WAY overgrown and terribly root bound. I have never layed hands on HER plants.
My only thought was YIKES. Hatchet and Sawz-All to the rescue
We have used such tactics before separating Hosta, suggested as much to her and she agreed.
Worked like a champ. Now praying for the plants.
The one on the far left below remains to be done.