Where to buy compost or garden soil in the Bay Area
I'm going to be planting some vegetable beds and need to amend the clayey soil with compost and/or garden soil. I'll probably need a lot of it. I could go to Home Depot/Lowe's and get Kellog's 3 cu ft garden soil. But at nearly $8 a bag, it isn't exactly cheap.
Where do you get your compost from in the San Francisco Bay Area?