Keyhole gardens are where you build a compost pile in the middle of a raised bed or hugelbed to keep it warm in the winter and to provide nutrients and worms, etc. Pretty cool idea.
There are some pretty neat ideas on that website. Not just keyhole gardens.
It's never too late to start! I retired to homestead on the slopes of Mauna Loa, an active volcano. I relate snippets of my endeavor on my blog : www.kaufarmer.blogspot.com
Slideshow boring ... losing consciousness ... just gonna take a quick nap on this tiny ad ...
Quit your workee-job and live, year round, for free-ish in Montana