Sawtooth Sunflower, Helianthus grosseserratus ssp. maximus, Helianthus grosseserratus var. hypoleucus, Helianthus instabilis
Helianthus grosseserratus (Sawtooth Sunflower) is a showy perennial with tall and sturdy, reddish or reddish-purple stems branching along the upper half of the plant. They are topped by a profusion of brilliant flowers, 4 in. across (10 cm), held in loose clusters from late summer to late fall. They are attractive to honey bees and bumblebees but also to gamebirds or songbirds as they love to eat the seeds. Notwithstanding its common name, the lance-shaped leaves, up to 8 in. long (20 cm), are often toothless or slightly serrated. Sawtooth Sunflower spreads quickly via its rhizomatous root system. It is perfect for naturalized areas where it can form showy colonies.
| Hardiness |
3 - 8 |
|---|---|
| Plant Type | Perennials |
| Plant Family | Compositae |
| Genus | Helianthus |
| Common names | Sunflower |
| Exposure | Full Sun |
| Season of Interest | Summer (Late), Fall |
| Height | 5' - 10' (150cm - 3m) |
| Spread | 2' - 3' (60cm - 90cm) |
| Spacing | 24" - 36" (60cm - 90cm) |
| Maintenance | Low |
| Water Needs | Average |
| Soil Type | Clay, Loam, Sand |
| Soil pH | Acid, Neutral |
| Soil Drainage | Moist but Well-Drained |
| Characteristics | Cut Flowers, Showy |
| Native Plants | United States, Northeast, Pennsylvania, Connecticut, Delaware, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Wisconsin, North Dakota, Ohio, Missouri, South Dakota, Nebraska, Midwest, Minnesota, Kansas, Indiana, Iowa, Illinois, Michigan, Southeast, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, West Virginia, Arkansas, Georgia, Kentucky, Southwest, Texas, Oklahoma |
| Attracts | Bees, Birds, Butterflies |
| Garden Styles | Informal and Cottage, Prairie and Meadow |
| Hardiness |
3 - 8 |
|---|---|
| Plant Type | Perennials |
| Plant Family | Compositae |
| Genus | Helianthus |
| Common names | Sunflower |
| Exposure | Full Sun |
| Season of Interest | Summer (Late), Fall |
| Height | 5' - 10' (150cm - 3m) |
| Spread | 2' - 3' (60cm - 90cm) |
| Spacing | 24" - 36" (60cm - 90cm) |
| Maintenance | Low |
| Water Needs | Average |
| Soil Type | Clay, Loam, Sand |
| Soil pH | Acid, Neutral |
| Soil Drainage | Moist but Well-Drained |
| Characteristics | Cut Flowers, Showy |
| Native Plants | United States, Northeast, Pennsylvania, Connecticut, Delaware, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Wisconsin, North Dakota, Ohio, Missouri, South Dakota, Nebraska, Midwest, Minnesota, Kansas, Indiana, Iowa, Illinois, Michigan, Southeast, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, West Virginia, Arkansas, Georgia, Kentucky, Southwest, Texas, Oklahoma |
| Attracts | Bees, Birds, Butterflies |
| Garden Styles | Informal and Cottage, Prairie and Meadow |
How many Helianthus grosseserratus (Sawtooth Sunflower) do I need for my garden?
| Plant | Quantity | |
|---|---|---|
| Helianthus grosseserratus (Sawtooth Sunflower) | N/A | Buy Plants |
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Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.
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