Will they come back next year? Yes!
The mums we carry are hardy, and you can often get them to come back for several years in St. Louis. 

 

Here are some tips:

• Plant them in the ground, rather than leaving them in a pot, for the best chance of overwintering.

 

• Plant them at least 4–6 weeks before the ground freezes so they can establish roots.

 

• After flowering, leave the stems through winter rather than cutting them completely to the ground. Cut them back in spring when new growth appears.

 

• Good drainage is important—winter wet can kill mums even when temperatures are technically within their hardiness zone.