| Description | An extremely tall native sunflower. |
|---|---|
| Pronunciation | (HE-li-an-thus) |
| Plant Type | All Plants, Wild Flowers |
| Hardiness Zone | cold hardy to at least #5 |
| Sunlight | full to semi-shade |
| Moisture | average to moist, not dry |
| Soil & Site | normal to moist, found in wet-mesic praires, old fencerows, marshes, ditches |
| Flowers | 1-3", yellow ray flowers, both disc and ray flowers present, ray flowers are deciduous and sterile; disk flowers are perfect and fertile, late August through September maybe into October |
| Leaves | coarse, alternate and lanceolate, basil leaves are absent, found in middle of stem upwards |
| Stems | smooth |
| Roots | tuberous and coarse |
| Dimensions | Reaches 6-10 feet tall and many they tend to lean over |
| Propagation | cold stratified seeds, division |
| Misc Facts | native (syn. Helianthus instabilis) |
| Author's Notes | I have this growing in the fence line of my property. It is very tall plant, providing the back fence line with yellow color in the fall. |
| Notes & Reference | #45-Prairie Propagation Handbook, #46-Wetland Plants and Plant Communities of Minnesota and Wisconsin (Eggers and Reed) |
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