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Heliopsis spp.

oxeyes

Asteraceae North and South America

Attracts Pollinators Attracts Butterflies Drought Tolerant Container Friendly

Native to North America

SunFull Sun – Part Shade

WaterLow · drought-tolerant

HardinessZones 3–9

Overview

Heliopsis spp. is a genus of about 15 species of perennials and annuals in the family Asteraceae, native to North and South America. Known as oxeyes or false sunflowers, plants grow 2-6 ft (0.6-1.8 m) tall on upright, branching stems with toothed, lance- to triangle-shaped leaves. The daisy-like flower heads are 1.5-3 in (4-8 cm) across, with golden-yellow to orange ray florets around a raised yellow to brown disc, and unlike true sunflowers the ray florets are fertile and set seed. H. helianthoides, smooth oxeye, is a tough prairie and woodland-edge perennial widely grown in borders and meadows. Plants bloom from early summer well into autumn and tolerate heat, humidity, and a range of soils. They spread slowly into clumps and self-seed in open ground. The heads draw bees and butterflies and last well as cut flowers. Powdery mildew and aphids appear in crowded or dry conditions.

Native Range

Heliopsis spp. is native to North and South America, with the perennial H. helianthoides ranging across central and eastern North America. Plants grow in prairies, meadows, open woodland, and along roadsides. The genus tolerates a broad range of soils and climates within this range.

Suggested Uses

Grown in perennial borders, prairie and meadow plantings, and pollinator and cutting gardens. The long bloom season and sturdy stems suit the middle and back of sunny borders. The heads draw bees and butterflies and feed seed-eating birds in autumn.

How to Identify

Look for upright, clump-forming plants with opposite, coarsely toothed leaves and single sunflower-like heads of golden-yellow rays around a domed disc. Unlike annual sunflowers, the ray florets are fertile and produce seed. The stiff stems and rough, three-veined leaves help separate oxeyes from related daisies.

Appearance

Size & Dimensions

Height2' - 6'

Width/Spread1'6" - 3'

Colors

Flower Colors

yellow

orange

Foliage Colors

green

Bloom Information

Bloom Period

~12 weeks

Summer Fall

Flowering begins in early summer and continues into autumn, generally June to September, often over two to three months. Removing spent heads prolongs the display. The wind- and insect-pollinated heads ripen seed through late summer and fall.

Detailed Descriptions

Flower Description

golden-yellow to orange with yellow-brown center

Foliage Description

green

Growing Conditions

Sun Requirements

SunFull Sun SunPartial Shade

Requires 6-12 hours of direct sunlight daily

• Full Sun: 6+ hours of direct sunlight

• Partial Shade: 3-6 hours of direct sunlight

• Full Shade: Less than 3 hours of direct sunlight

Soil Requirements

pH Range6.0 - 7.5(Neutral)

357912

Soil Types

loam clay sand

Drainagewell drained

Water & Climate

Water Needs

Low

Frost Tolerance

hardy

Time to Maturity

1-2 years

Drought Tolerance

Drought tolerant when established

Care & Maintenance

Care Guide

Plants grow in full sun to part shade in average, well-drained soil with a pH near 6.0 to 7.5, and tolerate clay, drought, and humidity once established. They are watered through dry spells in their first season and need little care afterward. Rich soil and shade produce taller, weaker stems that may need support. Plants are cut back after bloom to limit self-seeding. Division every few years keeps clumps vigorous.

Pruning

Spent flower heads are removed through the season to extend bloom and reduce self-seeding. Stems are cut to the ground in late autumn or early spring. Clumps are divided every three to four years to renew growth.