Helianthus grosseserratus Sawtooth sunflower
Ohio Native Plant Natural Range
Cultivation Information - Swamp Sunflower
Height - 8 to 10 ft - Ours are certainly close to 10 ft!Flower Color - YellowBlooms - August - OctoberSun - Full sun to part shade
Hardy Zone - 3 to 9Soil - Wet to moist
Family - Asteraceae
Wildlife Significance Swamp Sunflower
Native Perennial Sunflower
Nectar Source - For a wide range of butterflies, Syrphid flies, flies, bumblebees, short and long-tongued bee
Pollen Source - A variety of bees both long and short-tongued
Other insects - A wide variety of insects utilize various parts of the Helianthus giganteus. This native plant is a work-horse!!!
Seeds - Enjoyed by a wide range of song birds and small animals
Deer - and other mammals enjoy this sunflower
Beaver - Since the natural habitat for the Giant Sunflower is wetlands, beavers use stalks to reinforce their dams. This is not first hand knowledge as there are no beavers in our backyard,
Restoration - Considered a minor species for increasing diversity. Noted from the book A Guide to Native Plants of the New York City Region. Hum? This surprises me. If this were considered a minor species I need to investigate what a major would be.
For more details on this plant visit the Illinois Wildflower website