They can sprout like crazy from the base, the trunk and the crotch of pruned branches. This sounds like a blessing, but can be a real pain. They can also have a tendency to die back if you work a branch too hard. All and all, less robust than some junipers, but respond well to fertilization and highly oxygenated soil.
These grow all over the mountains by my house in northern Arizona. One of my favorite tree species in the world, the old ones are truly awe inspiring.