Pinch off blossoms in spring and early summer so that the plant will not bloom until fall.
Chrysanthemums are day length sensitive, meaning the amount of light they receive determines when they will bloom. Normally they do not start blooming until September. Depending upon the variety you have, it could be as late as the end of October.
I know that the fungicide Thiram can cause buds to drop if used too close to budding and blooming.
Trim off the dead parts of the plant. Fertilize lightly and pinch blossoms that are too early.
Too much salt can kill plants including chrysanthemums.
The chrysanthemums that florists use are annuals. However there are perennial chrysanthemums and as long as they are not planted too late in the year to develop a good root structure, they will survive the winter and bloom again.
Chrysanthemums need water so they have to be watered in droughts. If it is too wet, they can get fungal diseases. They can get aphids, spider mites and leaf miners. New cuttings can get bacterial infections. And chrysanthemums are toxic to children and pets.
Mission was accomplished: Iraq was removed.
If the weather has been too cold or hot, the flowers may not have been pollinated by insects sufficiently. At certain temperatures, the plant may only produce male flowers.
The newly blooming buds! The fact that temperatures aren't too cold and aren't too hot.
Don't prune your mums after July 1st. Otherwise it will not bloom in the fall.
Chrysanthemums will live outdoors in your garden, provided: -you live where it's warm all year, OR -you stick to 'garden' (or 'hardy') chrysanthemums that you buy at your local garden store. Their stock is tailored to your local conditions. The 'florist' (or 'exhibition') chrysanthemums are specially bred for beauty, not hardiness. They need special care, such as staking, and can't take cold winters. Some folks in West Texas say their weather varies from the low teens in winter to near one hundred degrees in the summer. They have chrysanthemum plants that they bought locally and planted outdoors three years ago and they keep coming back every year.
Chrysanthemums grow best when there is a lot of light available to them. They do best in fertile, sandy soil which should be well draining as they are susceptible to mildew.