Great Design Plant: Smooth Oxeye (Heliopsis helianthoides) — A Pollinator Magnet

Smooth oxeye (Heliopsis helianthoides) is a widely available, medium-sized native perennial. Given space, it excels in prairie plantings, large perennial beds, or sunny woodland edges. Its masses of bright yellow, daisy-like flowers delight gardeners and pollinators alike — expect a flurry of winged visitors all summer.

Botanical name: Heliopsis helianthoides
Common names: Smooth oxeye, false sunflower, oxeye sunflower, sunflower heliopsis
Origin: Eastern North America: ND east to PA (north), NM east to GA (south); Canada: SK east to QC
Zones: 2b–7a (hardy to –45°F)
Plant communities: Dry to mesic prairies, old fields, roadsides, woodland edges
Soil: Dry to medium, sandy-loam to clay-loam
Light: Partial to full sun
Size: 24–60 in tall, 18–36 in wide

Benefits: Tolerates well-drained soil
Seasonal interest: Bright yellow daisy-like flowers late June/early July; sturdy upright form; long-lasting color for months
When to plant: Spring or fall; potted plants at native nurseries in its range

Distinguishing Traits

Upright, bushy habit with large, bright yellow flowers.

How to Use It

Large perennial gardens, sunny woodland edges, naturalized prairie plantings. Combine with summer-blooming natives: hoary vervain (Verbena stricta), butterfly milkweed (Asclepias tuberosa), wild bergamot (Monarda fistulosa).

Shown: Female metallic green sweat bee (Agapostemon virescens).

Planting Notes

Space plants ≥30 inches apart. Plant 5–7 together for a strong color block. Divide mature plants in fall. If stressed, aphids may cover flower stems. Provide a pesticide-free garden with diverse natives to attract aphid predators: lacewings, syrphid flies, ladybird beetles.

Shown: Red admiral butterfly (Vanessa atalanta).

Pollinator Notes

One of the first flowers long-horned bees (Melissodes spp.) visit after emerging. Also attracts bumblebees (Bombus spp.), metallic green sweat bees (Agapostemon spp.), leafcutter bees (Megachile spp.), butterflies, and flies. Both ray and disc florets are fertile, developing from outside in. Female bees circle the flower over newest florets presenting pollen first.

Shown: Female long-horned bee (Melissodes sp.).