The full glory of mums doesn't last very long once the bloom has reached full peak. Perhaps you can do a big dead-head session to promote a bit of a second flush of blooms.

I don't buy those big mums for this very reason.

what she said ...

those flowers are spent... take some scissors.. and snip out the worst ...... just the flower .... see if you can find buds below ... perhaps you have enough season to get those to fruition ...

next year... buy the plant with one single flower open... so you can verify color.. if thats important ...

and then the bloom period might be a bit longer ...

the key to longevity.. is cold nights.. so the plant blooms in slo motion.. for lack of a better term ... the warmer the fall.. the faster they peak ....

ken

Now and again as blossoms age they lose a portion of their shading. It's simply the method of Mother Nature. On the off chance that you need to return shading to the sprouts, have a go at blending a glass of water and food shading. ... Blossoms just keep going so long, at that point they blur, wilt and bite the dust