See Part 1 of this article here.
One of the best ways to mancave your garden is to take the basic principles you would apply to an indoor mancave and simply move those ideas outside.
As I grow older my tastes have changed. What I would have enjoyed 10 years ago, I may not be into today...and that reflects in my Man Cave. As the time passes, we all slowly transition our personal rooms into a reflection of our current state of mind...