Is vermiculite truly necessary for a square foot garden?
I know it borders on blasphemy to ask this, but a friend of mine said that when she couldn't afford vermiculite, she simply used peat moss and compost and it worked beautifully. I'd like to hear some experts' thoughts and insights into this. What do you think? Of course, I love the idea of not having to use 15+ dollars of vermiculite for each garden, but I don't want to do it if it's just going to make them fail.