Nodding Onion Gardens

Native Plant Nursery

Where Wildflowers Grow

Columbia Station, Ohio, USA


Helianthus giganteus - Giant Sunflower - Swamp Sunflower

Ohio Native Plant - Natural Range

Helianthus giganteus

To view the natural range of Tall Sunflower visit the USDA Natural Resources Conservation Service website.
Helianthus giganteus

Wildlife Significance - Giant Sunflower

 (A 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

Restoration - Considered a minor species for increasing diversity. Noted from the book A Guide to Native Plants of the New York City RegionHum? 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
Helianthus giganteus

Cultivation Information - Swamp Sunflower

Height - 8 to 12 ft
Flower Color - Yellow
Blooms - July - September
Sun - Full sun to part shade

Hardy Zone - 5 to 11
Soil -  Wet to moist
pH -  4 to 7

Family - Asteraceae
little yellow butterfly resting on a green leaf
Sulphur Butterfly - Ken & Paula Korber

Seed Provenance - Helianthus giganteus - Giant Sunflower-Prairie Moon Nursery  2015 - Nodding Onion Gardens 2016 to present