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Rudbeckia triloba (Three-lobed coneflower)
Species Distribution Map: Click to enlarge
Map Color Key © 2013 BONAP

Rudbeckia triloba

Three-lobed coneflower or brown-eyed Susan

Hundreds of small, deep gold flowers bloom July through October! A naturalizing self seeder. Biennial or short-lived perennial. Georgia Gold Medal Winner in 1997. Three-lobed coneflower is very drought, heat and pest tolerant. Prized by butterfly and hummingbird gardeners.

SIZE
Rudbeckia triloba LP50 - 50 per flat Availability
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Height

2-3 Feet

Spread

12-18 Inches

Spacing

12 Inches

Bloom Color

Yellow

USDA Hardiness Zone 5-7

Three-lobed coneflower Interesting Notes

Rudbeckia triloba is a bushy, free-flowering, 2-3' (to 5') tall biennial or short-lived perennial that readily self sows and is very effective for naturalizing. It features masses of 1-2” wide, daisy-like, golden-yellow flowers with flat, purplish-brown centers on hairy stems from late summer to early fall. The thin, rough textured upper leaves are oval to lance-shaped and sometimes three-lobed at the base. Performance is best in moist but well-drained, humus-rich soil in full sun. Perfect for an informal garden, it also makes a good cut flower. Plant with Echinacea purpureaEutrochium maculatumConoclinium coelestinumSymphyotrichum laeve, and Vernonia novaboracensis. - Mt. Cuba Center

1997 Georgia Gold Medal Winner: Three-lobed Coneflower (Rudbeckia triloba) is a knockout in the late summer landscape with its showy floral display of bright yellow flowers. Like other Rudbeckia species, Three-lobed Coneflower is very drought - heat - and pest-tolerant. It's an excellent choice for rock gardens, banks or other drought-prone sites. Native to the United States, Three-lobed Coneflower is well-adapted to poor soils and requires little care. It's an excep­tional perennial for the low-maintenance gardener.

Plant Characteristics: Three-lobed Coneflower starts bloom­ing about the first week in August, and flowering continues well into September. It blooms a few weeks after Rudbeckia 'Goldsturm' and a month after the species Rudbeckia hirta is past its prime, so it's a great plant for a garden suffering from midsummer blahs! - State Botanical Garden of Georgia, Gold Medal Plant Program

Rudbeckia triloba Growing and Maintenance Tips

Prefers sandy or loamy, moist soils, but is drought resistant. Spreads slowly by rhizomes. Deadhead to prolong blooming season. Propagate by seed, cuttings and division. Cut back to the ground after first frost and mulch to protect roots for the winter. Outstanding in mass plantings, as a border perennial, or in rock or low maintenance gardens.

Key Characteristics & Attributes

Butterflies
Butterflies
Full Sun
Full Sun
Part Sun
Part Sun
Summer
Summer
Average
Average
Moist
Moist
Dry
Dry
Drought Tolerant
Drought Tolerant
Cut Flower
Cut Flower

Additional Information

Season of Interest (Flowering)
Fall
Late Summer
Soil Moisture Needs
Well-Drained
Plug Type
Landscape Plug™
Propagation Type
Open pollinated
Attributes
Native to North America
Dry Sun
Moist Sun
Meadow