Love those mums !
Fall and Mums go together. In Zone 4, Garden mums won’t survive like the perennial mums. I used to work “seasonal” at a large greenhouse and I would tell customers - it’s impossible to overwater them - they are little water hogs and water from the top isn’t enough. I set the flower pot in a pan of water overnight and the soil sucks it right up - which they love. I take the water away during the day. Enjoy !