We picked up a ten pack of mums in the one gallon (maybe 2) pots from one of the big box store last Oct 2012. They were very pretty with their yellow blooms. Each plant stood 5-7 inches tall at planting. They all went dormant over the winter, but come spring time, the entire flower bed got feed with 10-10-10. All other plants did wonderful when it came time to bloom. But the mums didn't. These things are about 3-4 feet tall.
Can someone tell me what happen? Thinking about either digging up or pruning back to see they will bloom next spring.

Thanks
Robb in Riverdale