description Maximilian Sunflower Overview
Maximilian sunflower (Helianthus maximiliani) is a tall perennial sunflower native to the central and western regions of North America. It grows from rhizomes and bears numerous yellow flower heads along the upper portions of its stems, generally flowering later in the growing season than many prairie wildflowers. Botanist Thomas Nuttall named it for Prince Maximilian of Wied-Neuwied, the German naturalist and explorer who traveled in North America.
insights Ranking position
Maximilian Sunflower ranks #43 of 341 in the Wildflower ranking, behind Turtlehead, ahead of Spotted Joe-Pye Weed.
help Maximilian Sunflower FAQ
Why does Maximilian sunflower bloom so late?
Helianthus maximiliani naturally flowers toward the end of the growing season, often after many summer prairie plants have faded. Its yellow heads provide late-season pollen and nectar before frost.
How tall and wide can Maximilian sunflower spread?
Mature stems commonly reach about 5 to 10 feet, depending on moisture, soil and competition. The plant also spreads through rhizomes, so a colony can expand well beyond the original planting spot.
Is Maximilian sunflower the same plant as the annual sunflower?
No, Maximilian sunflower is the perennial species Helianthus maximiliani and returns from underground growth each year. The familiar crop sunflower is Helianthus annuus, an annual species cultivated for seeds and oil.
Should Maximilian sunflower be cut back or staked?
In fertile soil, its tall stems may lean or fall during storms, so staking can help. Gardeners can also cut the stems back in late spring or early summer to encourage shorter, more branched growth, although this may delay flowering.
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