Create Your Garden

Rudbeckia subtomentosa (Sweet Coneflower)

Sweet Coneflower, Sweet Black-Eyed Susan, Fragrant Coneflower.

Rudbeckia subtomentosa, Sweet Coneflower, Sweet Black-Eyed Susan, late summer perennial, golden flowers, yellow perennial

A tough prairie plant, Rudbeckia subtomentosa (Sweet Coneflower) is a clump-forming perennial boasting masses of butter-yellow, daisy-like flowers, 2-3 in. across (5-7 cm), adorned with dark chocolate central cones. Blooming from mid-summer to frost, they are borne on branched stems, creating a lovely floral bouquet, and emit a pleasant sweet anise fragrance – thus the common name. Heat and humidity-tolerant, Sweet Coneflower retains its lush deep green foliage and showy blooms in the intense heat of summer when others may struggle. Sweet Coneflower is more long-lived than Rudbeckia hirta (Black-eyed Susan) and Rudbeckia triloba (Brown-eyed Susan) and will persist in the garden for many years. It is taller than Rudbeckia hirta and its flower heads are larger with longer and more abundant ray petals than Rudbeckia triloba.

  • Grows up to 3-6 ft. tall (90-180 cm) and 2-3 ft. wide (60-90 cm).
  • Thrives in full sun, in average, medium moisture, well-drained soils. Heat, humidity, clay soils, dry soils, and drought tolerant. Provide good air circulation to avoid powdery mildew.
  • Spectacular when massed in drifts, this is an excellent choice for perennial borders, cottage gardens, or naturalizing areas such as prairies or wildflower meadows. The flowers make excellent and long-lasting fresh-cut flowers.
  • Low maintenance and pest-free, it is also deer resistant.
  • Deadhead spent flowers to promote additional bloom. Cut back in the fall.
  • Native to the central United States.

Black-Eyed Susan: Plant Care and Growing Guide


Here are some tips on how to plant and grow black-eyed susans successfully

Requirements

Hardiness 3 - 8
Plant Type Perennials
Plant Family Compositae
Genus Rudbeckia
Common names Coneflower
Exposure Full Sun
Season of Interest Summer (Mid, Late), Fall
Height 3' - 6' (90cm - 180cm)
Spread 2' - 3' (60cm - 90cm)
Spacing 24" - 36" (60cm - 90cm)
Maintenance Low
Water Needs Average
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Showy
Native Plants United States, New York, Connecticut, Massachusetts, Southeast, Midwest, Northeast, Southwest, Iowa, Missouri, Illinois, Wisconsin, Kansas, Indiana, North Carolina, Tennessee, Mississippi, Arkansas, Kentucky, Louisiana, Texas, Oklahoma
Tolerance Drought, Deer, Dry Soil, Clay Soil
Attracts Birds, Butterflies
Garden Uses Beds And Borders
Garden Styles Prairie and Meadow, Informal and Cottage
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Rudbeckia
Guides with
Rudbeckia
Not sure which Rudbeckia to pick?
Compare Now

Alternative Plants to Consider

Rudbeckia hirta ‘Goldilocks’ (Black-Eyed Susan)
Rudbeckia hirta ‘Irish Eyes’ (Black-Eyed Susan)
Rudbeckia triloba ‘Blackjack Gold’ (Brown-Eyed Susan)
Rudbeckia fulgida ‘American Gold Rush’ (Black-Eyed Susan)
Rudbeckia maxima (Giant Coneflower)
Rudbeckia hirta ‘Amarillo Gold’ (Black-Eyed Susan)

Recommended Companion Plants

Aster ‘Little Carlow’ (Cordifolius Hybrid)
Kniphofia ‘Nobilis’ (Red Hot Poker)
Persicaria amplexicaulis ‘Rosea’ (Mountain Fleece)
Salvia uliginosa (Bog Sage)

Find In One of Our Guides or Gardens

20 Spring Wildflowers to Create a Dazzling Garden
How to Create an Enchanting Butterfly Garden
For the Love of Butterflies: Best Flowers to Attract them to Your Garden
6 Reasons You Should Create a Butterfly Garden
25 Types of Daisies You Should Grow
Best Annual Flowers For Your Vegetable Garden
Rudbeckia hirta (Black-Eyed Susan)
Rudbeckia fulgida (Black-Eyed Susan)
Black-Eyed Susan: Plant Care and Growing Guide
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
Buy Plants

Requirements

Hardiness 3 - 8
Plant Type Perennials
Plant Family Compositae
Genus Rudbeckia
Common names Coneflower
Exposure Full Sun
Season of Interest Summer (Mid, Late), Fall
Height 3' - 6' (90cm - 180cm)
Spread 2' - 3' (60cm - 90cm)
Spacing 24" - 36" (60cm - 90cm)
Maintenance Low
Water Needs Average
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Showy
Native Plants United States, New York, Connecticut, Massachusetts, Southeast, Midwest, Northeast, Southwest, Iowa, Missouri, Illinois, Wisconsin, Kansas, Indiana, North Carolina, Tennessee, Mississippi, Arkansas, Kentucky, Louisiana, Texas, Oklahoma
Tolerance Drought, Deer, Dry Soil, Clay Soil
Attracts Birds, Butterflies
Garden Uses Beds And Borders
Garden Styles Prairie and Meadow, Informal and Cottage
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Rudbeckia
Guides with
Rudbeckia
Not sure which Rudbeckia to pick?
Compare Now

Gardening Ideas

Plant Calculator

How many Rudbeckia subtomentosa (Sweet Coneflower) do I need for my garden?

Input your garden space dimensions

Your Shopping List

Plant Quantity
Rudbeckia subtomentosa (Sweet Coneflower) N/A Buy Plants

Please Login to Proceed

You Have Reached The Free Limit, Please Subscribe to Proceed

Subscribe to Gardenia

To create additional collections, you must be a paid member of Gardenia
  • Add as many plants as you wish
  • Create and save up to 25 garden collections
Become a Member

Plant Added Successfully

You have Reached Your Limit

To add more plants, you must be a paid member of our site Become a Member

Update Your Credit
Card Information

Cancel

Create a New Collection

Sign Up to Our Newsletter

    You have been subscribed successfully

    Join Gardenia.net

    Create a membership account to save your garden designs and to view them on any device.

    Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.

    Join now and start creating your dream garden!

    Join Gardenia.net

    Create a membership account to save your garden designs and to view them on any device.

    Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.

    Join now and start creating your dream garden!

    Find your Hardiness Zone

    Find your Heat Zone

    Find your Climate Zone