Ahh, football and fall. What a wonderful combination.
Why the yellow mums you ask? As a ND alum, they perfectly signal the beginning of the fall season. When I was a student, ND would always had their logo in mums at the entrance to the campus. I still buy mums every year for this reason. The yellower the mum, the better.
I don't spell anything with my mums, I just use them to perk up my patio planters. After this summer, everything was d-e-a-d, so it was nice to put some life back in there.