Helianthus grosseserratus - Saw-tooth Sunflower
Saw-tooth Sunflower (Helianthus grosseserratus) is a hardy perennial and can form in dense colonies or as a stand-alone plant. Its strong central stem is often red or reddish-purple in color, and there is very little branching except for flowering stems towards the top half of the plant. Its leaves are oblong and dark green with a sandpapery texture due to tiny stiff hairs. The upper stems terminate into individual or small clusters of bright yellow flowers. Its height can vary widely, if it is in a dense colony it will grow 3' - 5' and stand-alone plants can grow up to 12 feet.
Soil Moisture: Moderate
Sun Exposure: Full Sun
Height: 3' - 12'
Spread: 2' - 3'
Hardiness Zone: 3 - 8
Bloom Color: Yellow
Bloom Time: August, September, October
Attracts: Birds, Butterflies, Pollinators
There are about 70 species of Helianthus plants that consist of annual and perennial flowering plants, commonly called sunflowers, and are native to North, Central, and South America. They are usually tall plants with disc flowers that for the majority of species are yellow, but there are some species with reddish lobes. Before blooming, young sunflower heads follow the sun across the sky and at night they reorient themselves to face East for the sunrise. Once the flower heads are mature and fully open, they generally stop moving with the sun and remain facing East.
Returns of standard seed mixes and individual species must be made in the original unopened packaging within 10 days of delivery. If you wish to return live plants, you must do so within 5 days of delivery. Returns of standard mixes, individual species, and live plants are subject to a restocking fee of 25%. Custom seed mixes may not be returned. When returning non-damaged goods, the buyer is responsible for shipping charges, and return shipping may be made by whatever means the buyer selects.
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