Alphabetical Plant Listing

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

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Great Plant Combination Ideas with Helianthus - Sunflowers

Guides with Helianthus - Sunflowers


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

Great Plant Combination Ideas with Helianthus - Sunflowers

Guides with Helianthus - Sunflowers

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