Hibiscus Flowers in Illinois?

Friday, August 7, 2026

Most of us probably think of hibiscus flowers as only growing in tropical regions, like Hawaii. While truly tropical species can’t survive here, some hibiscus species have adapted to Illinois’ climate. One example, found in many Chicagoland home gardens and yards, is the non-native Rose of Sharon, or Common hibiscus, Hibiscus syriacus. It’s a woody, deciduous shrub, that creates numerous branches and blooms in summer with white, pink, or purple flowers. Due to its aggressive growth and ability to self-seed, it’s considered an invasive species by many gardeners but not officially listed on the state’s restricted species list. If you have one in your yard, and still want to enjoy it’s blossoms, experts recommend clipping off seed heads in the fall before they open and release their seeds. There are also some cultivars that produce little to no seeds. (Experts at The Morton Arboretum recommend closely monitoring any Rose of Sharon volunteer seedlings that sprout.) But there are native species of hibiscus you can plant instead, called mallows, that love wet areas.

Each July through September, huge hibiscus blossoms, 4-6+ inches across, appear along our creek here at Knoch Knolls Park. The flowers range from pure white to a vivid pink. This native species, the Swamp Rose Mallow, Hibiscus moscheutos (or palustris), sometimes called Hardy Hibiscus, grows wild in wetlands in eastern and southern Illinois. It’s a perennial that dies back each winter and regrows in the spring. It can reach eight feet tall but typically grows to about 5 feet. The seeds are encased in a large, unique capsule that helps with identification later in the season.

Local wildlife love this flower as well admiring humans. Bumblebees and other long-tongued bees cross pollinate the flowers. There’s even a bee that specializes on this plant – collecting nectar and pollen from the flowers – named the Rose Mallow bee. According to Capitaltrees.org, at least 28 species of butterflies and moths use this plant as food, or a hose plant, for their caterpillars. Butterfly caterpillars, including the Painted Lady and Common Checkered Skipper enjoy the leaves while the caterpillar of the Grey Hairstreak feeds on the developing seeds. And moth caterpillars, such as the Delightful Bird-Dropping Moth, Yellow Scallop Moth, Io Moth, Pearly Wood Nymph also eat the plant. Hummingbirds visit too for sips of nectar. And the non-native, and invasive, Japanese beetle also feeds on this plant. 

So if you need a bit of a tropical pick-me-up, check out the wetland areas in your neighborhood this summer and fall. You might be greeted by almost dinnerplate-sized flowers, with lots of wildlife visitors!

To learn more about native hibiscus in Illinois visit - https://illinoispollinators.org/plant/swamp-rose-mallow/ 

To learn more about native Illinois bees visit, https://outdoor.wildlifeillinois.org/articles/buzzing-into-summer 

To learn how to add this native hibiscus to your garden, visit - https://extension.illinois.edu/blogs/ilriverhort/2017-07-28-huge-hibiscus-flowers-are-garden-standout