ITA with
Prism99
Another consideration .... poly/cottons may pill whereas cottons will not.
Yet another thought re the use of your poly/cotton ... you might consider it for your backing.
When I made my 1st QIAD, we were directed to poly/cotton for the backing fabric.
The reason being that it would "slide" better when using it as a bedspread or topper,
whereas the cotton would "stick" more and be harder to shift around.
And just as
Prism99 mentioned ... the backing stayed true to colour, and top faded dreadfully.
I don't think I would have noticed the fade near as much,
if the direct comparison were not there staring at me in the face!
But it did slide nicely, and made for easy bed-making!