Botanical Name: Helianthus maximiliani
Height: about 2 m
Season of bloom: late September and October
Growing Conditions: Full sun. Ordinary, well-drained garden soil.
Wildlife benefits: Very late flowers are much appreciated by many pollinators. Nutritious seeds are eaten by many small birds.
From Ottawa Valley or eastern Ontario sources: No. Native to the Canadian prairies but considered adventitious with agriculture as far east as Quebec.
Seeds: Germination Code: C(60) – cold, moist stratify for 60 days
Remarks: Leans towards the sun, if not given full sun.
Similar species: Tall Sunflower
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Beaux Arbres Plantes Indigènes / Native Plants 