The flower loves full sun, and can stomach shade. The rose mallow can easily take the harsh winters. Just make sure to plant them in the spring to give them time to establish themselves before the cold winter sets in.
Rose mallow tolerates deer, but can have problems with pests like whiteflies. A little tip to manage unwanted bugs is to attract ladybugs to your garden. Ladybugs love chives, cilantro, dill and fennel, so an abutting herb garden can bring plenty of ladybugs into your space to ward off unwanted insects.