perennial

Sweet Black-Eyed Susan

Rudbeckia subtomentosa

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

36 inches

Width

24 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8

Water

Moderate

Humidity

Average

Lifespan

Perennial

Native To

North America

Toxicity

Non-toxic

The Story

Plant Bio

Rudbeckia subtomentosa, commonly known as Sweet Coneflower, is a perennial with tall, upright stems and finely hairy, aromatic leaves. It produces large, daisy-like flowers with golden-yellow petals and a prominent central cone. This species is distinguished by its densely hairy foliage and its ability to attract pollinators, making it a popular choice for wildlife gardens and naturalized landscapes.

Bloom Period:

EarlyLate

Uses & Benefits:

Bright, cheerful flowers that brighten garden beds and attract pollinators.

Drought-tolerant and low-maintenance, ideal for sustainable gardens.

Supports native pollinators and beneficial insects.

Marketplace

Where to Buy

We couldn't find this plant listed online right now.

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Planting

How to Grow

Tuck seeds into well-draining soil in early spring
Water regularly until established, then reduce watering
Place in full sun for best flowering
Divide clumps every 3-4 years in early spring
Mulch to retain moisture and suppress weeds
Deadhead spent flowers to encourage more blooms

Pro Tip

Ensure good drainage to prevent root rot and promote healthy growth.

Keep It Thriving

Care Guide

Do

Water deeply during dry periods 🌱
Divide every 3-4 years to rejuvenate
Deadhead regularly for continuous blooms

Don't

Overwater, which can cause root rot ❌
Allow soil to become waterlogged
Neglect deadheading, reducing flowering

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Divide
Prune
Stake

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Wildflower meadow with vibrant yellowsSunny border for late summer colorPollinator-friendly garden feature

Companion Plants

Echinacea Rudbeckia hirta Salvia Coreopsis Gaillardia

Multiply

Propagation Methods

Good to Know

Common Questions

Sweet Black-Eyed Susan questions

What zones can Sweet Black-Eyed Susan grow in?

Sweet Black-Eyed Susan is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Sweet Black-Eyed Susan deer resistant?

Yes — Sweet Black-Eyed Susan is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Sweet Black-Eyed Susan bloom?

Sweet Black-Eyed Susan typically blooms in mid-summer through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Sweet Black-Eyed Susan need full sun?

Sweet Black-Eyed Susan does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.