can I use flannel as my backing fabric
 

if my front is 100% cotton? The front is all from a charm pack.

I just completed a lap quilt for my husband using flannel as backing (no batting). We live in Phoenix and don't need a quilt with heavy batting. He loves the quilt. I made it a little oversized so if he does need extra warmth, he simply folds the quilt in half. Otherwise, it's fine the way it is.

yes i do it all the time or minky is nice i have a hard time free arming minky
but just takes longer

Cotton describes the fiber content. Flannel describes the weave and finish. It can be 100% cotton or a poly blend, or wool or other fibers.

And yes, cotton flannel can be used any where your other cotton fabrics are used.

Absolutely! Makes a wonderfully warm, yummy quilt.

I would wash the flannel first. It often shrinks a lot more than regular quilting cotton.

I have begun using flannel on all my quilts (except where I use a fleece). And I do wash the flannel at least 2 or 3 times and dry also in the hottest settings I can.

Yes and yes to all the suggestions above. My DS just commented on the flannel blanket which kept them warm during this -25° weather spree we are having.

I love backing with flannel, especially kid quilts. I makes them very soft and cuddly. As others have said, wash the flannel first as it shrinks more than regular cottons.

Absolutely! As previously said, I prewash all my flannels.