Helianthus debilis

The cucumberleaf or beach sunflower — a graceful, multi-branching annual that scatters dozens of smaller, refined golden blooms rather than one giant head.
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  • Sunflower Stella seeds (Helianthus debilis) – annual flower Sunflower Stella (Helianthus debilis) – annual flower seeds from SeedsChoice
    Sunflower Stella Seeds Helianthus Debilis Annual
    €4,45

    Sunflower Stella for borders and annual hedges sunflower stella seeds are a decorative choice for gardeners who want a branching, multi-flower display in summer. This stella sunflower variety is known for producing multiple blooms per...
  • Sunflower Stella seeds (Helianthus debilis) – annual flower Sunflower Stella (Helianthus debilis) – annual flower seeds from SeedsChoice
    20%
    Sunflower Stella Seeds Helianthus Debilis Annual Flower Variety
    €3,96€4,95

    Sunflower Stella for bright, branching summer borders Sunflower Stella seeds are an annual flower variety valued for its abundant bloom display and strong garden presence. This selection produces a cheerful Helianthus debilis look with yellow...
  • Sunflower Mixed seeds (Helianthus debilis) – annual flower Sunflower Mixed (Helianthus debilis) – annual flower seeds from SeedsChoice
    Sunflower Seeds Mixed Annual Helianthus Debilis
    €4,45

    Mixed annual sunflowers for borders and bouquets sunflower seeds are a classic choice for adding bold, warm colour to summer gardens. This mixed annual sunflower variety produces bright, radiant blooms in a range of sunny...
  • Sunflower Esther seeds (Helianthus debilis) – annual flower Sunflower Esther (Helianthus debilis) – annual flower seeds from SeedsChoice
    20%
    Sunflower Esther Seeds Helianthus Debilis Annual
    €3,56€4,45

    Sunflower Esther for warm, radiant garden color sunflower esther seeds are a striking choice for gardeners who want warm toned sunflower flowers with a lively, summery look. This esther sunflower variety is an annual type...
  • Sunflower Esther seeds (Helianthus debilis) – annual flower Sunflower Esther (Helianthus debilis) – annual flower seeds from SeedsChoice
    Sunflower Esther Seeds Helianthus Debilis Annual Flower
    €4,95

    Sunflower Esther for bright summer garden color sunflower esther seeds are an annual flower choice for gardeners who want warm, radiant tones and a strong presence in sunny beds. This Helianthus debilis selection is known...
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Helianthus debilis — the cucumberleaf sunflower

Helianthus debilis is the botanical name for the cucumberleaf or beach sunflower, a graceful, multi-branching annual that scatters dozens of smaller, refined sunflower blooms rather than one giant head. It is the species behind part of our sunflower range within the flower seed collection.

History & origin

Native to the southern United States, where it colonises coastal dunes and sandy ground, this sunflower has adapted to heat, drought and lean soils. That easy, branching nature made it a favourite parent of many modern multi-headed and cut-flower sunflowers grown today.

The genus name Helianthus joins the Greek helios, sun, and anthos, flower, while the species epithet debilis means weak or slender, describing its airy, branching stems rather than the single stout stalk of the common sunflower.

Botanical characteristics

Bushier and more refined than the giant sunflower, it produces a long succession of golden, dark-centred flowers on slender, well-branched stems. The pollen- and nectar-rich blooms are excellent for bees and butterflies, earning it a place among our pollinator flowers, while the abundance of smaller, long-stemmed flowers makes it a superb cut flower.

Growing Helianthus debilis from seed

Easy and quick, it is best sown direct where it is to flower once the soil has warmed in spring, or started under cover a little earlier. Give it full sun and free-draining soil; once established it is notably drought-tolerant and flowers prolifically until the frosts. Our flower growing guide and flower sowing calendar cover the timing.

Ready to grow sunflowers? Browse the varieties or learn the basics first.

Related categories: Sunflower · Cut Flowers · Pollinator Flowers · Drought-Tolerant Flowers · All Flower Seeds

At SeedsChoice, every order ships from Meppel, NL with fast, tracked EU delivery.

How does Helianthus debilis differ from a common sunflower?
Instead of one giant head it branches freely, carrying many smaller, refined golden flowers — ideal for cutting and for a longer display. Is it easy to grow from seed?
Very. Sow direct once the soil warms in spring, or start a little earlier under cover; it germinates and grows quickly. Does it cope with poor, dry soil?
Yes — a coastal-dune native, it tolerates heat, drought and lean ground once established. Is it good for pollinators?
Excellent — the pollen- and nectar-rich blooms are a magnet for bees and butterflies through summer.