Oh, gads, you don't want to know. LOL I tried to "shovel" all around the base and loosen them up, then just pushed them back and forth till the big root broke. Instant root pruning. LOL And I hacked more of the roots off with the shovel. I am ruthless with a shovel, a hedge pruners, and a hand pruner.
They have taproots like dandelions. LOL
