HeirloomContainer OK

Black-Eyed Susan

Rudbeckia hirta

Black-Eyed Susan is a vibrant perennial flower featuring bright golden-yellow petals surrounding a distinctive dark brown or black central disk. It reaches maturity in 100-120 days from seed and produces abundant blooms throughout summer and fall. This heirloom variety is exceptionally low-maintenance and thrives in full sun to partial shade (4-6+ hours), adapting well to most soil types. The defining characteristic is its cheerful two-tone appearance and prolific, long-lasting flowers ideal for gardens, borders, and fresh cut arrangements.

Harvest

100-120d

Days to harvest

📅

Sun

Full sun to partial shade

☀️

Zones

3–8

USDA hardiness

🗺️

Height

2-4 feet

📏

Planting Timeline

Zone:

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Start Indoors

Transplant

Direct Sow

Start Indoors

Transplant

Direct Sow

Showing dates for Black-Eyed Susan in USDA Zone 7

All Zone 7 flower →

Zone Map

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Black-Eyed Susan · Zones 3–8

What grows well in Zone 7? →

Growing Details

Difficulty

Very Easy

Spacing12-18 inches

SoilAdaptable to most soils, prefers well-drained

pH5.5-7.5

WaterModerate — regular watering

SeasonTender Perennial

FlavorN/A - Ornamental

ColorBright golden-yellow petals with dark brown centers

Size3-4"

Zone-by-Zone Planting Calendar

Zone	Indoor Start	Transplant	Direct Sow	Harvest
Zone 3	April – May	June – July	June – August	—
Zone 4	March – April	June – June	June – July	—
Zone 5	March – April	May – June	May – July	—
Zone 6	March – April	May – June	May – July	—
Zone 7	February – March	April – May	April – June	—
Zone 8	February – March	April – May	April – June	—
Zone 9	January – February	March – April	March – May	—
Zone 10	January – January	February – March	February – April	—
Zone 1	May – June	July – August	July – September	—
Zone 2	April – May	June – July	June – August	—
Zone 11	January – January	January – February	January – March	—
Zone 12	January – January	January – February	January – March	—
Zone 13	January – January	January – February	January – March	—

Complete Growing Guide

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: Clay, Loam (Silt), Sand. Soil pH: Acid (<6.0), Alkaline (>8.0), Neutral (6.0-8.0). Drainage: Good Drainage, Moist, Occasionally Dry. Height: 2 ft. 0 in. - 4 ft. 0 in.. Spread: 1 ft. 0 in. - 2 ft. 0 in.. Spacing: Less than 12 inches, 12 inches-3 feet. Growth rate: Rapid. Maintenance: Low. Propagation: Seed. Regions: Coastal, Mountains, Piedmont.

Harvesting

Small brown seeds late summer. Displays from July to October.

Color: Brown/Copper. Type: Capsule.

Harvest time: Fall, Summer

Storage & Preservation

For fresh cut flowers, store stems in a cool location (65-72°F) with high humidity, keeping water fresh and removing lower foliage. Cut flowers typically last 7-10 days indoors. For preservation, dry flowers by hanging bundles upside-down in a warm, well-ventilated space for 2-3 weeks for long-lasting arrangements. Alternatively, press individual flowers between paper layers under weight for 7-10 days to create floral crafts or cards. Seeds can be collected from spent flower heads once fully dried and stored in cool, dry conditions for 2-3 years.

History & Origin

Origin: Eastern United States, NC

Advantages

+Attracts: Butterflies, Pollinators, Small Mammals, Songbirds
+Fast-growing
+Low maintenance

Companion Plants

Purple Coneflower (Echinacea) and Bee Balm bloom on a similar late-summer schedule, share a preference for well-drained soil in the pH 5.5–7.0 range, and attract enough native bees and swallowtails to keep the whole planting productive without competing at the root zone. Ornamental grasses placed 18–24 inches out add structure and cut wind without casting the shade that shuts down Rudbeckia's flowering. Skip Walnut Trees entirely — juglone leached from Juglans nigra roots kills or badly stunts Rudbeckia within the drip line, and Black-Eyed Susan is more sensitive to it than most ornamentals. Dense Hostas crowd the base and block the 4–6 hours of sun this plant needs to flower well.

Plant Together

Purple Coneflower

Similar growing conditions, attracts beneficial pollinators, creates attractive color contrast

Bee Balm

Attracts beneficial insects and pollinators, similar sun and soil requirements

Rudbeckia

Same family with identical growing needs, extends bloom season with different varieties

Black-Eyed Peas

Fixes nitrogen in soil, improving nutrition for Black-Eyed Susans

Marigold

Repels harmful insects and nematodes, complementary orange colors

Sedum

Similar drought tolerance, provides late season interest when Susans fade

Lavender

Repels pests with aromatic oils, shares preference for well-draining soil

Ornamental Grasses

Provides structural support and winter interest, similar low-maintenance needs

Keep Apart

Walnut Trees

Produces juglone toxin that inhibits growth and can kill Black-Eyed Susans

Dense Hostas

Creates too much shade and competes for nutrients, reducing flowering

Mint

Aggressive spreading habit can overtake and crowd out Black-Eyed Susan plantings

Pests & Disease Resistance

Resistance

Excellent disease resistance

Common Pests

Aphids, leaf miners, occasional deer browsing

Diseases

Powdery mildew in humid conditions, root rot if overwatered

Troubleshooting Black-Eyed Susan

What you'll see, why it happens, and what to do about it.

White powdery coating on upper leaf surfaces, usually appearing mid-summer when nights cool and humidity rises

Likely Causes

Powdery mildew (Erysiphe cichoracearum) — thrives when daytime heat and cool humid nights combine
Crowded spacing below 12 inches that traps moisture and blocks airflow

What to Do

1.Cut out the worst-affected stems at the base and discard them — don't compost
2.Thin plants to at least 12 inches apart so air can move through
3.Apply a dilute baking soda spray (1 tablespoon per gallon of water) weekly as a low-stakes intervention on mild cases

Leaves mottled with pale tan tunnels or winding lines, no chewing damage on the edges

Likely Causes

Leaf miners (Liriomyza spp.) — larvae feeding inside the leaf tissue between the upper and lower surfaces
Heavy aphid pressure earlier in the season that stressed the plant and attracted secondary pests

What to Do

1.Pinch off and trash the affected leaves — the larvae are sealed inside, so sprays don't reach them
2.Check for aphid colonies on new growth and knock them off with a firm stream of water
3.Avoid high-nitrogen fertilizer pushes that produce the soft, lush growth leaf miners prefer

Frequently Asked Questions

How long does Black-eyed Susan take to bloom from seed?▼

Black-eyed Susans typically bloom 90-120 days from seed germination. Spring-sown seeds usually flower by midsummer the same year, while fall-planted seeds emerge in spring and begin blooming by July. Plants started indoors in late winter provide the earliest blooms, often flowering within 60-75 days of transplanting outdoors.

Is Black-eyed Susan good for beginners?▼

Absolutely—Black-eyed Susan ranks among the easiest flowers for beginning gardeners. They tolerate poor soil, drought, heat, and neglect while still producing abundant blooms. The main requirement is adequate sunlight and occasional watering during establishment. Their forgiving nature and reliable performance make them ideal confidence-building plants for new gardeners.

Can you grow Black-eyed Susan in containers?▼

Yes, Black-eyed Susans grow well in containers at least 12 inches deep and wide. Use quality potting mix and ensure good drainage holes. Container plants need more frequent watering than ground-planted ones, especially during hot weather. Choose dwarf varieties like 'Toto' series for smaller pots, or standard varieties for larger containers where they can reach full size.

When should I plant Black-eyed Susan seeds?▼

Plant Black-eyed Susan seeds in fall (6-8 weeks before first frost) or early spring (after last frost date). Fall planting is often more successful because seeds get natural cold stratification over winter. For spring planting, cold-treat seeds in the refrigerator for 4-6 weeks before sowing for better germination rates.

Do Black-eyed Susans come back every year?▼

Black-eyed Susans are short-lived perennials that typically live 2-3 years, but they self-seed so prolifically that new plants replace the old ones, creating the appearance of a long-lived perennial garden. You'll have continuous Black-eyed Susan presence in your garden through natural reseeding, though individual plants don't survive many years.

Black-eyed Susan vs Coneflower—what's the difference?▼

Black-eyed Susans have golden-yellow petals with dark brown centers and are typically shorter-lived, while Purple Coneflowers (Echinacea) have purple, pink, or white petals with bronze centers and live longer. Both have prominent central cones, but Black-eyed Susans are more drought-tolerant and self-seed more readily. Coneflowers offer more color variety but require better soil conditions.