PL. —Rudbeckia fulgidaBotanical illustration — drop image

Rudbeckia fulgida

Orange Coneflower

SummerFall

4a–9aHardiness zone

Peak bloom windowZone 6b · frost-offset weeks

Winter

Not in bloom

Spring

Peak bloom

Summer

Peak bloom

Fall

Not in bloom

Peak bloom

In bloom

Peak bloom windowZone 6b · frost-offset weeks

Winter

Not in bloom

Spring

Peak bloom

Summer

Peak bloom

Fall

Not in bloom

Peak bloom

In bloom

Background

Rudbeckia fulgida is a clump-forming perennial native to the eastern United States, reliably hardy through zones 4–9. It produces golden-yellow daisy-like flowers with raised dark brown central cones from July through October, and is more consistently perennial than the shorter-lived R. hirta. It naturalizes readily in borders, rain gardens, and meadow plantings with minimal intervention once established.

Plants spread gradually by rhizomes and self-seed at a moderate rate over several seasons. They tolerate clay soils, periodic drought after establishment, and summer heat, and adapt across a broad pH range. Dividing crowded clumps every three to four years keeps plants vigorous. In zones 4–5, a layer of mulch over the crown after the ground freezes helps ensure winter survival. The cultivar 'Goldsturm' (var. sullivantii) is the most widely sold selection and delivers especially uniform habit and flower size.

Seed heads left standing through fall and winter are heavily used by goldfinches and chickadees. The extended bloom window and pollen-rich centers make R. fulgida a reliable late-summer foraging resource for native bees, bumble bees, and a range of butterfly species.

Good companions

Goldenrod Joe Pye Weed Little Bluestem Agastache

Care guide

SunFull sun to part shade

WaterModerate

SoilAverage, well-drained, tolerates clay

Spacing18–24 in

Height18–36 in

Zone4a – 9a

Native RegionAR, CT, GA, IL, IN, IA, KY, ME, MA, MI, MN, MO, NH, NJ, NY, NC, OH, PA, RI, SC, TN, VT, VA, WV, WI

Direct sowFrost hardy

Seasonal tasks

winter

cutCut old stems and foliage back to a few inches above ground in late winter before new growth begins.

sowStart seeds indoors in trays, pressing them onto the soil surface without covering; seeds need light to germinate and sprout in 10–21 days at 70°F.

spring

cutDivide congested clumps in early spring when new growth is just emerging; replant divisions at the original depth and water in well.

sowTransplant hardened-off seedlings or nursery plants into the garden after the last frost, spacing 18–24 in apart.

summer

cutRemove faded flowers through midsummer to encourage continued production; stop in late August so seed cones can develop fully.

watchCheck foliage during humid spells for powdery mildew and septoria leaf spot; thin congested stems to improve airflow and avoid wetting leaves when watering.

fall

watchLeave seed heads standing through fall and winter to feed goldfinches and other seed-eating birds; cut back only in late winter before new growth emerges.

Common problems

Powdery mildew

Symptoms

White or grey powdery coating on leaves — usually starting on older growth in humid conditions or when nights cool.

Treatment

Improve air circulation by thinning plants. Apply neem oil or potassium bicarbonate spray at first sign. Avoid overhead watering.

Septoria Leaf Spot

Symptoms

Small tan to brown spots with dark borders on leaves, often with tiny black specks at the center. Spots merge and lower leaves yellow and die.

Treatment

Remove infected leaves and avoid overhead watering. Space plants for airflow and rotate planting location each year. Apply a copper-based fungicide if spread continues.

Aster Yellows

Symptoms

Deformed, greenish flowers, stunted growth, and yellowed foliage. Flower centers may produce tufts of leafy growth instead of normal petals.

Treatment

No cure. Remove and destroy infected plants immediately to stop spread. Control leafhoppers, which transmit the disease, and remove nearby weed hosts.