Hi Becky! Hmmm, I grow mums in containers all the time.....and I grow cosmos and
Hollyhocks every year too, but they can get super tall...check out my
Hollyhock from last year!
One of my cosmos last year was taller than me and I'm 5'10", and that
Hollyhock was taller than me.......foxgloves can get pretty tall too.....
I've never attempted to grow any of those 3 in pots.....I'm not too sure how it would work....I guess you could try it out though...depending on how big of a planter you have some of them might be okay. And the
Hollyhocks and cosmos might need staked up.......