If I find growth coming from below the knuckle or bud union, should I cut if off?
No. Cutting off “sucker” or “wild” growth does not remove the source of the trouble and often causes in to grow that much more vigorously and instead of one shoot when cut back, often two or more shoots will grow out. The proper way to remove a sucker growth is to remove earth carefully from the base of the plant until you get down to where the sucker originates from the root of the rose. Then actually tear or gouge the sucker out of the root so that you remove the bud from which the sucker originated.
