I was finally able to get some Metro-Mix 300 at a garden center about 60 miles from here--only place reasonably close I could find it. It was near where I was meeting a friend for lunch, so didn't mind the trip. And the price was reasonable. I came home with 3 of the 2.8 cu ft. bags (wish I had bought 4). It's just so much nicer to work with then MG.
