Common Name: oxeye sunflower
Type: Herbaceous perennial
Family: Asteraceae
Zone: 3 to 9
Height: 2.00 to 2.50 feet
Spread: 1.75 to 2.00 feet
Bloom Time: June to September
Bloom Description: Yellow with yellow center disks
Sun: Full sun
Water: Dry to medium
Maintenance: Low
Flower: Showy, Good Cut
Attracts: Birds, Butterflies
Tolerate: Drought, Clay Soil, Dry Soil, Shallow-Rocky Soil
Culture
Easily grown in average, dry to medium, well-drained soil in full sun. Tolerates drought, but does best if regularly watered. Tolerates a wide range of soils, including poor, dry, and clayey. Tolerates some light shade, but plants are less vigorous and stems need support in heavier shade. Remove spent flowers to extend bloom season. Plant stems may be cut back by 1/3 to 1/2 in late May to reduce overall plant height.
Noteworthy Characteristics
Heliopsis helianthoides, commonly called oxeye sunflower or ox-eye daisy, is an upright, clump-forming, nearly glabrous, sunflower-like, short-lived perennial that is native to eastern and central North America. It typically grows to 3-4' tall and features daisy-like flowers (2-3” diameter) with yellow-orange rays surrounding brownish-yellow center cones. Flowers bloom throughout summer atop stiff stems clad with ovate, toothed leaves (to 6" long). The blooms are attractive to butterflies and other insect pollinators. Small seeds are attractive to birds.
Plants in the genus Heliopsis are both similar in appearance to and closely related to those in the genus Helianthus, the true sunflower. Heliopsis is sometimes commonly called false sunflower.
Genus name comes from the Greek words helios meaning the sun and opsis meaning resembling in allusion to the rayed yellow flower heads.
Specific epithet means resembling the genus Helianthus.
'Inhelsodor' is a compact, upright selection of oxeye sunflower that features bright yellow, sunflower-like flowers and dark green foliage. The 3.75" diameter blooms are held on sturdy stems and have yellow center disk florets surrounded by a single layer of yellow ray florets. The long flowering period lasts from early summer to early fall. The flowers are suitable for use in fresh cut arrangements. Mature clumps will reach up to 2.5' tall and spread to fill a 2' area. Commonly sold in nurseries and garden centers under the name TUSCAN GOLD. Plant patent number PP29819 applies to this cultivar.
Problems
No serious insect or disease problems. Some susceptibility to aphids. Taller plants may need staking or other support.
Uses
Provides long summer bloom for the perennial border or cutting garden. Also effective in a native plant or wild garden or as part of a naturalized planting or prairie area.