I transplant my pots every spring while they are still semi-dormant. I just go up 1 pot size as they don't like being disturbed. If the same holds true for JMs in the ground, I would try to disturb the root ball as little as possible.
Life is short, Break the rules, Forgive quickly, Kiss slowly, Love Truly, Laugh
uncontrollably, And never regret anything that made you Smile.
