@ShadyStump @Bonsai Forest Update pics below, I will also be moving to colorado in a few weeks, any tips on keeping it healthy there? Is it okay out in the snow?
I have no performed any pruning at all, what is the purpose of pruning? when should I do it?
Where in Colorado? I'm in Cañon City.
Pruning, like
@pandacular said, helps get old foliage out of the way so new, healthier foliage can take it's place. That's the practical aspect of it.
Aesthetically, you want to maintain the look and style of the tree, or maybe even restyle it into something new. Using the search function on the site will help you learn about that, and don't be afraid to ask questions. People here are always ready to talk technique.
In terms of winter storage here in Colorado, a procumbens will manage the cold alright in most places in the state, and it won't mind snow at all. We do often get EXTREME temperature swings, though; like sometimes upwards of 40+F differences inside of 24 hours, and 50F swings aren't unheard of. Those swings are more dangerous than anything else to a tree in winter. You'll want to keep it on the ground near the house, but on the north side where the temps are more constant, even if colder. Inside an unheated garage that never gets above 50F will also work. You also REALLY want to protect it from wind in winter.
There are other options and techniques as well, but we'd need to know more about your living and working situation before those are relevant.
Summers here have their own unique challenges as well, but one thing at a time.