Helianthus decapetalus (Ten-Petaled Sunflower)
Thinleaf Sunflower, Ten-Petaled Sunflower, Thin-leaved Sunflower, Pale Sunflower, Helianthus scrophulariifolius, Helianthus tracheliifolius
An attractive woodland sunflower , Helianthus decapetalus (Ten-Petaled Sunflower) is a showy rhizomatous perennial bearing oval to lance shaped, dark green leaves, 7 in. long (17 cm), with sharply serrated edges. Blooming for 4-6 weeks in early summer to late fall, a profusion of yellow flowers, 3 in. across (7 cm), are borne atop tall leafless stems. They feature 8-12 yellow rays and a golden yellow center disk. The blossoms are attractive to bees, butterflies and other pollinators. Birds and small mammals love to eat the seeds directly from the seed heads. Perfect for adding summer and fall color in partly shaded borders and naturalized areas.
- Typically grows up to 3-5 ft. tall (90-150 cm) and 2-3 ft. wide (60-90 cm). Will spread vigorously by self-seeding and creeping rhizomes to form colonies.
- Performs best in part shade in moist to mesic conditions, and a rich loamy soil.
- Low maintenance, this is a fine choice for partially shaded cottage gardens, bird or butterfly gardens, wildflower gardens, prairies and meadows or along ponds and streams.
- No serious pest or disease issues. Keep an eye out for powdery mildew if the plant is stressed by long periods of drought. This plant is occasionally browsed by rabbits or deer.
- To create a bushier plant prior to the blooming season, remove a third of the plant's height in early summer.
- Propagate by seeds planted in the spring or division in fall or spring.
- Native to the Eastern and Central United States and Canada, from New Brunswick west to Iowa, Wisconsin, and Ontario, south as far as Georgia and Louisiana.
Learn How To Plant, Care and Grow Gorgeous Sunflowers
Cherished for their beauty, Sunflowers (Helianthus) are striking ornamental annuals or perennial plants grown for their colorful summer and fall blooms. Fast-growing, they can reward you with glamorous blooms between 55 and 100 days after planting. Here are some basic rules that need to be followed to enjoy their splendid flowers.Read More
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Requirements
Hardiness | 4
– 9 |
---|---|
Plant Type | Perennials |
Plant Family | Helianthus - Sunflowers |
Exposure | Partial Sun |
Season of Interest |
Summer (Early,Mid,Late) Fall |
Height | 3' – 5' (90cm – 150cm) |
Spread | 2' – 3' (60cm – 90cm) |
Spacing | 24" – 36" (60cm – 90cm) |
Water Needs | Average |
Maintenance | Low |
Soil Type | Loam, Sand |
Soil pH | Acid, Alkaline, Neutral |
Soil Drainage | Moist but Well-Drained |
Characteristics | Showy |
Native Plants | United States, Midwest, Illinois, Indiana, Iowa, Kansas, Michigan, Missouri, Ohio, Wisconsin, Northeast, Connecticut, Delaware, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Southeast, Alabama, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, West Virginia, Southwest, Oklahoma |
Attracts | Birds, Butterflies |
Garden Uses | Beds and Borders, Ponds and Streams |
Garden Styles | Informal and Cottage, Prairie and Meadow |
123rf, PhotoStudioMCD, Shutterstock
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
Requirements
Hardiness | 4
– 9 |
---|---|
Plant Type | Perennials |
Plant Family | Helianthus - Sunflowers |
Exposure | Partial Sun |
Season of Interest |
Summer (Early,Mid,Late) Fall |
Height | 3' – 5' (90cm – 150cm) |
Spread | 2' – 3' (60cm – 90cm) |
Spacing | 24" – 36" (60cm – 90cm) |
Water Needs | Average |
Maintenance | Low |
Soil Type | Loam, Sand |
Soil pH | Acid, Alkaline, Neutral |
Soil Drainage | Moist but Well-Drained |
Characteristics | Showy |
Native Plants | United States, Midwest, Illinois, Indiana, Iowa, Kansas, Michigan, Missouri, Ohio, Wisconsin, Northeast, Connecticut, Delaware, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Southeast, Alabama, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, West Virginia, Southwest, Oklahoma |
Attracts | Birds, Butterflies |
Garden Uses | Beds and Borders, Ponds and Streams |
Garden Styles | Informal and Cottage, Prairie and Meadow |