I wash ALL my material as soon as I get home from the QS. Have you ever heard of Retayne?? It will stop the bleeding on any colors. I wash all my fabric together (reds too) and use 1 teaspoon of Retyane per yard of fabric. Even washed reds & whites together. On my charms, I soak them in a dishpan of real hot water till the water cools and then hang each piece over my towel bar over my tub and don't even wring them out.
You can buy Retayne at your local QS or ask about them getting it, it is a wonder and wouldn't quilt without it as I think washing before will solve a lot of problems down the road.