Heliopsis Helianthoides 'Summer Nights'

Smooth Oxeye

Heliopsis helianthoides ‘Summer Nights’ is a hardy perennial valued for its rich dark stems and bright, daisy-like flowers. Deep green leaves are complemented by reddish stems in spring, creating a strong contrast, followed by abundant golden-yellow blooms with darker centers from early summer into fall, providing long-lasting color. Its sturdy habit and extended bloom time make it a reliable performer in sunny borders.

Type: Perennial

Mature Size:
Width: 2–3 ft
Height: 3–4 ft
(10-year size: forms expanding clumps)

USDA Zones: 3a–9b
Form: Upright, clump-forming
Light: Full sun (best flowering)
Soil: Average, well-drained soils; adaptable
Water: Moderate; tolerates some drought once established

Wildlife: Attracts bees and butterflies; seeds may attract birds


Features & Landscape Uses


Long bloom period from early summer to fall



Bright yellow flowers with dark stems for contrast



Excellent for borders, massing, and cut flowers



Durable and easy to grow




Care
Low-maintenance and adaptable. Plant in full sun for best flowering. Deadhead to encourage continued bloom, or leave seed heads for wildlife. Cut back in late fall or early spring. Divide every few years to maintain vigor.

Plant type

Perennial

Height

3'-4'

Width

2'-3'

Hardiness zones

3–9

Sunlight

Full Sun

Growth rate

Moderate

Bloom time

Late Summer, Mid Summer

Flower color

Yellow

Leaf color

Green

Fall color

Dark Green

Attracts

Bees, Butterflies

Soil

Average, Clay, Highly Adaptable, Well Drained

Shape

Clump, Upright

Fragrant

Yes

Drought tolerant

Yes