Dark Red Sunflower Helianthus atrorubens
Other Common Name(s):
Previously known as:
- Discomela atrorubens
- Helianthus atrorubens var. alsodes
- Helianthus sparsifolius
- Phonetic Spelling
- hee-lee-AN-thus a-tro-ROO-bens
- Description
-
The Appalachian sunflower is a clumping, rhizomatous, herbaceous perennial, native from New Jersey to the Southeastern United States. This wildflower is typically found in woodlands or along roadside banks of dry, rocky, sandy, or clay soils. It is commonly found in the Piedmont and most of the Coastal Plains of North Carolina; however, it is rarely seen in the northeastern Coastal Plains or in the northern mountains. This species grows from 3 to 5 feet tall with an erect stem of mostly basal foliage, and has small clusters of daisy-like flowers with yellow petals and a dark brownish-purple center disk. It is a member of the daisy family (Asteraceae). The specific epithet, atrorubens, is derived from the Latin words ater, meaning dark, and rubra, meaning red.
This plant prefers full sun and tolerates partial shade. It thrives in moist, well-drained, sandy, rocky, or clay soils with alkaline to neutral pH. Drought and dry soil-tolerant once the plant is established. To prolong the blooming season, deadhead the spent blooms. As the plant begins to fade and die back in the fall, cut the plant back to ground level. It is best propagated by seeds or division.
Click here to see a calendar of planting schedules, time-to-harvest, and recommended spacing.
The plant has a clumping habit and an erect, rough, hairy greenish to purple stems. Its green leaves are mostly basal, while the mid and upper stem leaves are smaller and fewer. It has small clusters of flowers. Each flower measures 2 to 3 inches wide with yellow petal rays and a brownish-purple center disk of tubular florets. This species is easily identified in the wild; its stem has only a few leaves, and the flower has a brownish-purple center disk.
This low-maintenance plant excels in open woodland gardens, cottage gardens, and mixed perennial beds, attracting bees and butterflies. The woodland birds will enjoy collecting their seeds..
Insects, Diseases, and Other Plant Problems: No serious insect or disease problems. Monitor for slugs and snails. May be susceptible to powdery mildew and white mold. May require staking to support the flowers and stems.
- See this plant in the following landscape:
- Cultivars / Varieties:
-
- Tags:






- Cultivars / Varieties:
-
- Tags:
-
-
Attributes:
- Genus:
- Helianthus
- Species:
- atrorubens
- Family:
- Asteraceae
- Life Cycle:
- Perennial
- Recommended Propagation Strategy:
- Division
- Seed
- Country Or Region Of Origin:
- New Jersey to the Southeastern United States
- Distribution:
- Native: United States--AL, FL, GA, KY, LA, NJ, NC, SC, TN, and VA. Introduced: Turkmenistan
- Fire Risk Rating:
- medium flammability
- Wildlife Value:
- Flowers provide nectar to pollinators from July until the first frost. This is a larval host plant that supports Silvery Checkerspot (Chlosyne nycteis). The Silvery Checkerspot has at least 1-2 broods in the north from June to July, in the deep south and Texas, they have as many as 3 to 4 broods from May through September. Songbirds, ruffed grouse, quail, morning doves, and small mammals enjoy the seeds.
- Play Value:
- Attractive Flowers
- Attracts Pollinators
- Colorful
- Easy to Grow
- Wildlife Food Source
- Wildlife Larval Host
- Dimensions:
- Height: 3 ft. 0 in. - 5 ft. 0 in.
- Width: 1 ft. 0 in. - 3 ft. 0 in.
-
-
Whole Plant Traits:
- Plant Type:
- Herbaceous Perennial
- Native Plant
- Wildflower
- Woody Plant Leaf Characteristics:
- Deciduous
- Habit/Form:
- Erect
- Growth Rate:
- Rapid
- Maintenance:
- Low
- Texture:
- Coarse
-
-
Cultural Conditions:
- Light:
- Full sun (6 or more hours of direct sunlight a day)
- Partial Shade (Direct sunlight only part of the day, 2-6 hours)
- Soil Texture:
- Clay
- Sand
- Shallow Rocky
- Soil pH:
- Alkaline (>8.0)
- Neutral (6.0-8.0)
- Soil Drainage:
- Good Drainage
- Moist
- Occasionally Dry
- Available Space To Plant:
- 3 feet-6 feet
- NC Region:
- Coastal
- Mountains
- Piedmont
- USDA Plant Hardiness Zone:
- 6a, 6b, 7a, 7b, 8a, 8b
-
-
Fruit:
- Fruit Color:
- Brown/Copper
- Display/Harvest Time:
- Fall
- Fruit Type:
- Achene
- Fruit Length:
- < 1 inch
- Fruit Width:
- < 1 inch
- Fruit Description:
- The fruit is a dark brown, narrow, oval achene that is slightly bristled. The achene is 2.8 to 3 mm long. Displays from September to November.
-
-
Flowers:
- Flower Color:
- Brown/Copper
- Gold/Yellow
- Purple/Lavender
- Flower Inflorescence:
- Head
- Flower Value To Gardener:
- Showy
- Flower Bloom Time:
- Fall
- Summer
- Flower Shape:
- Radial
- Flower Petals:
- 7 - 20 petals/rays
- Bracts
- Flower Size:
- 1-3 inches
- Flower Description:
- The flower heads appear in small clusters. The daisy-like flower measures up to 3 inches wide and has 10 to 15 yellow ray florets that surround a dark brownish-purple disk of tubular florets. There are several flowers on individual 3-inch pedicels. There are bracts at the base of the head that overlap and are oval or oblong-shaped. Blooming occurs from August to November.
-
-
Leaves:
- Woody Plant Leaf Characteristics:
- Deciduous
- Leaf Color:
- Green
- Leaf Feel:
- Rough
- Leaf Type:
- Simple
- Leaf Arrangement:
- Opposite
- Leaf Shape:
- Lanceolate
- Ovate
- Leaf Margin:
- Crenate
- Serrate
- Hairs Present:
- Yes
- Leaf Length:
- 3-6 inches
- Leaf Width:
- 1-3 inches
- Leaf Description:
- The leaves are primarily basal, appearing at the lower stem. They are opposite in arrangement, lanceolate to ovate with crenate or serrate margins. The leaf base is cuneate (wedge-shaped) or truncate (ends abruptly). The mid to upper stem leaves are fewer and smaller, and there are usually 3 to 6 pairs of stem leaves. Leaves are hairy and rough on top, pubescent on the bottom. The leaf size measures from 3 to 10 inches long and 1 to 4 inches wide; however, the leaves become noticeably smaller as they ascend the stem. Leaf pairs are present in a whorled pattern around the stem. The petioles often have a winged appearance.
-
-
Stem:
- Stem Color:
- Green
- Purple/Lavender
- Stem Is Aromatic:
- No
- Stem Surface:
- Hairy (pubescent)
- Stem Description:
- The green to purplish stems may be simple or have a few branches. The lower stem is very hairy. As the leaf pairs reduce in size toward the upper part of the stem, the stem becomes pubescent to glabrous.
-
-
Landscape:
- Landscape Location:
- Meadow
- Naturalized Area
- Woodland
- Landscape Theme:
- Butterfly Garden
- Cottage Garden
- Cutting Garden
- Native Garden
- Pollinator Garden
- Design Feature:
- Border
- Attracts:
- Butterflies
- Pollinators
- Songbirds
- Resistance To Challenges:
- Deer
- Drought
- Dry Soil