Can you grow plants in pure compost?
I was thinking of planting all my garden in 5 gallon containers, or bigger if I can get them cheap. The cheapest stuff I can buy to fill the containers is pure compost, which I can buy for $8 a cubic yard, really nice stuff made from horse manure and sawdust, completely composted and fine screened. Sand would cost around $45 a cubic yard plus an equal amount for delivery. I used to be able to get perlite for $2 a cubic foot, but the place I got it from isn't answering the phone so probably went out of business, and any other sources charge too much so perlite is out. Vermiculite has gotten very expensive because of the asbestos issue so that is out too. Actually there is something cheaper I could use, which is my almost pure clay soil, so pure I could make pottery or bricks from it.
I read that squash can grow in a compost pile, has anyone ever grown anything in pure compost with nothing else added to it, and how did it turn out? What about mixing clay and compost say half and half?