Species oxeye sunflower
yellow ray petals with green, hairy, multi-layered sepal and stem

oxeye sunflower

Heliopsis helianthoides

Also Known As - oxeye sunflower
Oxeye sunflower (Heliopsis helianthoides) is a perennial flower native to North America. It features bright yellow flowers with bronze-red centers atop sturdy stems. Blooms occur in late spring and last throughout the summer. The triangular-shaped green foliage provides an interesting contrast for the large cheery flowers. Preferring dry or moist sites, oxeye sunflower is also tolerant of a range of soils, even those that are poor in fertility. This species is an easy-to-grow plant that adds a spark of cheerful color to any garden.

Cycle:

Herbaceous Perennial

Watering:

Minimum

Hardiness Zone:

3 - 9

Flowers:

Orange-yellow rays with brown center disks Flowers

Sun:

Full sun

Soil:

Sandy Loamy Rocky

Fruits:

brown,black Fruits In Autumn Ready In Fall

Leaf:

Yes

Leaf Color:

green

Growth Rate:

High

Maintenance:

Low

Drought Tolerant:

Yes

Salt Tolerant:

Yes

Invasive:

Yes

Care Level:

Medium

watering

Oxeye sunflower should be watered when the soil 1-2 inches deep is slightly dry to the touch. A general rule of thumb is to water oxeye sunflower deeply and thoroughly approximately once per week. In warmer climates, water more frequently than once per week. To ensure that the entire root system receives water, thoroughly saturate the soil surrounding the plant. When watering, ensure that the entire root ball is moistened throughout. After watering, check the soil 1-2 inches down to make sure the soil is retaining moisture.

sunlight

Oxeye sunflower (Heliopsis helianthoides) should be grown in a location that provides full sun to light shade, meaning the plant should receive at least 6 to 8 hours of direct sunlight each day. This species of sunflower is fairly tolerant of partial shade, but the more sunlight it receives, the better. Morning sunlight is the most beneficial since it helps the plant dry off any leftover moisture from the night before. Oxeye sunflower should not be planted in a shady area, as it will struggle to survive in that environment.

pruning

Oxeye sunflower should be pruned in late winter or early spring before new growth begins. Pruning can help maintain the natural shape of the plant, encourage flowers to form, and prevent the plant from becoming overgrown and unruly. For general maintenance, prune back dead flower heads and any dead branches. For fuller, bushier flowers and plants, lightly prune outer stems back by 1/3 every spring. Additionally, plants can be divided every few years to encourage healthy growth.

Propagation

Season

Fall
Winter
Spring
Summer
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Harvest Fruit

Starts Flowering

Starts Flowering

Harvest Fruit

Hardiness Map

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