Lori, They add barley malt to their bread flours so it doesn't work very well for the mother starter. I had trouble with it turning black. If you can't find any local organic flour, send me your address and I'd be happy to send you a 3# sack that will get you started on the right foot.
MaryJane, Farmgirl #1 Plowin' Thru ~ giving aprons a good wrap for 45 years and counting ~
I have been very happy for quite a while now, using Bob's Red Mill Organic Unbleached white flour. It is what I always use to add to my sourdough starter (mother). For the baking, I use King Arthur bread flour, or a local flour. I have also used MaryJane's flour and was very happy with that. But Bob's Red Mill is what fits my budget best and has been very successful. I get it at my local natural foods store. The regular supermarket carries a lot of B.R.M. products, but not the organic flour that I use for mother.