I use only all one kind ie 100% cotton or poly, always wash first and dry. Cotton and poly shrink differently.

Thank you all for your advice. Great to have a place that one can get the answers they need.

gramie bj, i love the idea of your quilt with all types of fabric! i'd love to see a pic when you're done...i love all types of fabric, too..i may have to try one like that!!