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Heliopsis helianthoides 'Summer Sun' (Smooth oxeye)

Heliopsis helianthoides 'Summer Sun'

Smooth oxeye

(syn. Sommersonne)

This local native sunflower happily naturalizes in moist or dry conditions. Upright and clump forming with bright yellow flowers June through August. Tough and easy to grow. Staking is rarely necessary due to sturdy and strong stems. Very attractive to nectar seekers. Great for cut flowers.

Heliopsis helianthoides 'Summer Sun' - 50 per flat Availability
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3-4 Feet


2-3 Feet

Bloom Color


USDA Hardiness Zone 4-9

Smooth oxeye Interesting Notes

Summer Sun produces a seemingly never ending supply of yellow, semi-double daisy flowers with deep orange-yellow center disks. Excellent tall selection for the back of the border. Very attractive to nectar seekers. Perfect for cutting, your vases will overflow with this cheery perennial. - Bluestone Perennials

This is a great plant for the busy home gardener who expects his plants to give him more than he deserves. It will produce arm loads of flowers all summer long and never once ask for decent soil or proper care. It will even thrive on heavy clay where other flowers refuse to grow. And bees, wasps, flies, and butterflies will feed on the nectar and enjoy it while the "gardener" is away doing real work. - Floridata

The genus name is from the Greek helios, meaning sun, and opsis, meaning resembling.

Heliopsis helianthoides 'Summer Sun' Growing and Maintenance Tips

Prefers moist, well-drained soil in full sun, but may tolerate drought. Propagate by seed, cuttings or division every 2-3 years. Deadhead to extend the blooming season. Low maintenance. Best utilized in the back of a border garden to accent lower growing, brightly colored perennials, as well as wildflower and cutting gardens.

Key Characteristics & Attributes

Full Sun
Full Sun
Part Sun
Part Sun
Cut Flower
Cut Flower

Additional Information

Season of Interest (Flowering)
Late Summer
Soil Moisture Needs
Propagation Type
Seed cultivar
Moist Sun
Native to North America