I can't stress enough the importance of using quality materials in your garden. Don't skimp and buy cheep just to save a dollar. Spending a little extra is beneficial for the long term health of your garden. You want the garden soil, fertilizers and other products you use in your garden to be good quality.
In this video Chris Roy President of OC Farm Supply gives you a tour of their location and shows you all the sustainable products they have for sale. If you have never been here, then I would highly recommend to go. You will not be disappointed.