I saw some ?mum plants in a grocery store this winter & wondered if they would survive like my other mums do outdoors in my zone 7? The label said: .... C. dendraflorum. Very beautiful flowers unlike the hardy ones I have had growing for years outdoors. Mine survive our winters well & have grown for several years so wondering how long I can expect them to do so & if these in the store are not hardy?

Sorry I couldn't find a better place to post my question!

Thanks!