SF bay area city dump's compost quality
I'd like to buy tons of compost to amend the soil for my fruit trees. Right now, it's all clay. I live in the South Bay and there are several city dumps that sell compost (or give away for free).
I heard the quality of city compost can vary considerably. And one of my concern is city dump's compost contains high number of weeds.
Would anyone share their experience with using compost from city dump in south bay?
I'm thinking of buying stuff from http://www.zankerproducts.com/z-best-organic-compost
Would that be a good choice?