Rose mallow is a very robust perennial that fills a lot of space in the garden. Even varieties that are considered “dwarf” grow at least three feet tall and wide, with standard-sized rose mallow growing 4-6 feet tall and wide. Find a place in your landscape where it will not be crowded by other plants, because it will quickly out compete your other perennials for space within a year or two. It is best to find a permanent spot the first time you plant it to avoid the need for transplanting later. Do not prune it to keep it smaller, as this will remove the flower buds.
Tender Zone 4 perennial so it will need heavy mulch before frost!