Mixing regular cotton and flannel
 

Are there any issues I should be aware of if I mix flannel with regular cotton in a quilt top? I have some leftover flannel from some dresses I've made but not really enough to use for anything by itself and I'm hoping I can use it the same way I use regular cotton.

In addition to what Tartan has advised, I'd also suggest making sure it is well pre-washed. Due to the looser weave, it has a tendency to shrink more than typical quilting cotton. Otherwise, have fun!

I use both in quilts all the time, have never had an issue.

Same here. I also pre-wash every fabric I have. With the flannel I measured it first then threw it in warm to hot water and a hot dryer. A couple times. The second wash showed no more shrinkage. Learned a long time ago to use 1/2" seam allowance.

Prewash and 1/2" seam allowance - got it! Thanks!

I agree with the others. Also, having learned this the hard way ... be sure to pre-wash your flannel in whatever laundering conditions the final recipient will use. Pre-washing in cold water/low heat does no good if your recipient then washes in hot water & dries on high heat. The flannel will shrink like crazy & the plain cotton fabric will crinkle a lot to compensate.

Flannel will stretch more readily than quilter's cotton. I take extra care in squaring up fabric, starch heavily & do extra basting when combining the two. I also find for piecing, putting the flannel on the bottom helps to ease in any little bit of extra fullness that may occur while moving through my machine.