North America Native Plant

Cucumberleaf Sunflower

Botanical name: Helianthus debilis cucumerifolius

USDA symbol: HEDEC2

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Helianthus cucumerifolius Torr. & A. Gray (HECU7)  âš˜  Helianthus debilis Nutt. var. cucumerifolius (Torr. & A. Gray) A. Gray (HEDEC3)   

Cucumberleaf Sunflower: A Charming Native Wildflower for Your Garden If you’re looking for a delightful native wildflower that brings sunshine to your garden without demanding much attention, meet the cucumberleaf sunflower (Helianthus debilis cucumerifolius). This cheerful little member of the sunflower family might just become your new favorite garden companion, ...

Cucumberleaf Sunflower: A Charming Native Wildflower for Your Garden

If you’re looking for a delightful native wildflower that brings sunshine to your garden without demanding much attention, meet the cucumberleaf sunflower (Helianthus debilis cucumerifolius). This cheerful little member of the sunflower family might just become your new favorite garden companion, especially if you love plants that work hard while looking effortlessly beautiful.

What Makes Cucumberleaf Sunflower Special?

Don’t let the name fool you – while it’s called cucumberleaf sunflower, this plant is all about those sunny yellow blooms! The cucumber part refers to the shape of its leaves, which are somewhat reminiscent of cucumber plant foliage. You might also see this plant listed under its synonyms Helianthus cucumerifolius or Helianthus debilis var. cucumerifolius in older gardening references.

As a native forb (that’s garden-speak for a non-woody flowering plant), cucumberleaf sunflower can behave as either an annual or perennial depending on your climate. It’s a true American native, belonging to our lower 48 states and bringing authentic local beauty to your landscape.

Where Does It Call Home?

This adaptable sunflower has quite an impressive range across the United States. You’ll find it growing naturally from the sunny coasts of Florida and Texas, up through the Carolinas and Georgia, and even as far north as Maine and Michigan. It thrives in states including Connecticut, Louisiana, Maryland, Massachusetts, New Hampshire, Pennsylvania, Rhode Island, Vermont, Virginia, and West Virginia.

Garden Appeal and Design Role

What makes cucumberleaf sunflower such a garden gem? Picture this: masses of bright yellow, daisy-like flowers with dark centers dancing in the breeze from summer through fall. The blooms are smaller and more delicate than their giant sunflower cousins, creating a softer, more naturalized look that works beautifully in various garden settings.

This versatile native shines in:

  • Wildflower meadows and prairie gardens
  • Cottage-style landscapes
  • Coastal gardens (it’s remarkably salt-tolerant)
  • Naturalized areas where you want low-maintenance color
  • Pollinator gardens

Perfect Growing Conditions

Here’s where cucumberleaf sunflower really wins hearts – it’s wonderfully low-maintenance! This sun-loving native thrives in USDA hardiness zones 8-11 as a perennial, though gardeners in cooler zones can easily grow it as an annual.

For best results, give your cucumberleaf sunflower:

  • Full sun: At least 6-8 hours of direct sunlight daily
  • Well-draining soil: Sandy soils are perfect, but it adapts to most soil types
  • Good drainage: While drought-tolerant once established, it doesn’t like wet feet
  • Space to spread: This plant likes to naturalize and self-seed

Planting and Care Made Simple

Growing cucumberleaf sunflower is refreshingly straightforward. Direct seed in your garden after the last frost date in spring – these seeds germinate easily and the plants establish quickly. If you’re starting with plants, spring planting works beautifully.

Once established, this native is quite drought-tolerant, making it perfect for water-wise gardens. During the growing season, you can deadhead spent flowers to encourage more blooms, but many gardeners prefer to let some flowers go to seed to enjoy the wildlife benefits and natural reseeding.

Wildlife and Pollinator Paradise

One of the most compelling reasons to grow cucumberleaf sunflower is its incredible value to local wildlife. The bright yellow flowers are magnets for bees, butterflies, and other beneficial pollinators throughout the blooming season. As flowers fade and produce seeds, you’ll likely spot goldfinches and other seed-eating birds enjoying the feast.

This creates a wonderful cycle in your garden – pollinators get nectar, birds get seeds, and you get the joy of watching this ecosystem unfold right outside your window.

Is Cucumberleaf Sunflower Right for Your Garden?

This native sunflower is an excellent choice for gardeners who want to:

  • Support local ecosystems with native plants
  • Enjoy long-lasting color with minimal maintenance
  • Create habitat for pollinators and birds
  • Add natural charm to informal garden areas
  • Grow something that thrives in challenging conditions like coastal areas

Keep in mind that cucumberleaf sunflower does self-seed readily, so it’s perfect for naturalized areas but might not be the best choice for highly manicured formal gardens where you want complete control over plant placement.

Whether you’re creating a pollinator haven, establishing a wildflower meadow, or simply want to add some native sunshine to your landscape, cucumberleaf sunflower offers beauty, ecological benefits, and the satisfaction of growing a plant that truly belongs in your local environment. Sometimes the best garden choices are the ones that feel like they were always meant to be there – and that’s exactly what this charming native delivers.

Cucumberleaf Sunflower

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Helianthus L. - sunflower

Species

Helianthus debilis Nutt. - cucumberleaf sunflower

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA