Black Eyed Susan, Rudbeckia Seeds

Rudbeckia Hirta Black-Eyed Susan Seed

America’s iconic wildflower brings sunshine to effortless plantings
Golden rays surround the familiar raised brown cone
Forgiving plants thrive in full sun and ordinary soils
Natural choice for meadows, wildlife gardens, and bouquets

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Key Attributes

Botanical Name

Rudbeckia hirta

Days to maturity

115 Days

Sun

Full Sun

Packet

25 Seeds

Zones 3–9 Check your growing zone

About Rudbeckia Hirta, Black-Eyed Susan Seed, Black-Eyed Susan Seed

The Black Eyed Susan Rudbeckia is a wonderful, stiff upright flower that is stunning and will definitely grab your attention. This variety is an annual or short lived perennial native to the eastern United States. The Black Eyed Susan is probably the most common of all American wildflowers. The characteristic brown, domed center is surrounded by bright yellow ray florets that thrives in most soils in full sun. The Black Eyed Susan is a true sunshine worshiper that forgives neglect.

Growing details

Planting

Sow Depth

1/4"

Days to Germination

7–21 days

Germination Type

C30 - Cold Moist 30 Days

In-row plant spacing

18"

Plant profile

Life Cycle

Perennial

Hardiness Zone

Zones 3-9

Plant Height

36 inches

Growth Habits

Clumping, Upright

Seed & variety

Seeds Per Ounce

53,813

Color

Yellow

Seed Type

Open Pollinated

Before Planting

Select full sun and ordinary, well-drained soil for black-eyed Susan. Remove perennial weeds, avoid rich manure, and cold-stratify seed when required by the species or seed source.

Planting

Surface-sow black-eyed Susan indoors 8–10 weeks before the last frost. Many perennial strains germinate more uniformly after about 4 weeks of cold-moist stratification; annual Rudbeckia may not require it. Maintain 65–70°F with light, harden seedlings, and transplant 12–18 inches apart. Fall sowing provides natural chilling.

Watering

Water seedlings regularly during establishment. Mature plants tolerate moderate drought, but a deep soaking during prolonged dry weather extends flowering; let crowns drain and keep foliage dry overnight.

Fertilizer

Top-dress lightly with compost in spring. Fertilizer is unnecessary in most beds, and excess nitrogen leads to tall, floppy stems with fewer flowers.

Harvesting

Cut black-eyed Susans when ray petals are fully expanded but the dark center remains tight and pollen has not begun shedding heavily. Harvest sturdy stems early in the day and place them into water. Leave selected seed heads standing for birds or collect them after they dry.

Tips

Leave some late seed heads for finches while removing others to limit volunteers. Divide perennial clumps when crowded, and stake only unusually tall plants or those grown in partial shade.

Pests & Diseases

Septoria leaf spot, powdery mildew, rust, Botrytis blight, and Verticillium wilt can affect black-eyed Susan. Watch for dark spotted leaves, white coating, orange pustules, gray mold, or progressive wilting. Space plants generously, water at soil level, remove infected leaves and fall debris, rotate beds, and discard plants with persistent vascular wilt.

Lace bugs cause pale stippling and dark specks beneath black-eyed Susan leaves; aphids, Japanese beetles, and leafhoppers also feed on plants. Check leaf undersides first. Remove plants with aster-yellows distortion, handpick beetles, and preserve predators that help suppress lace bugs and aphids.