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Sweet Black-eyed Susan

Rudbeckia subtomentosa

Big black-eyed susan with beautiful form and lots of flowers; great for rain gardens


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Rudbeckia subtomentosa, commonly called sweet Black-eyed Susan or sweet coneflower, is a native perennial forb (wildflower) which grows on moist prairies, along streambanks and in low areas throughout the state.

Wildlife notes

Many kinds of insects visit the flowerheads for either nectar or pollen.  The caterpillars of a butterfly, Chlosyne nycteis (Silvery Checkerspot), sometimes feed on Rudbeckia spp. as host plants.

Forage notes

Quite palatable to livestock during the growing season.

Landscaping notes

Best grown in medium moisture soils that are well-drained loams in full sun. Tolerates hot and humid summers and some drought. Appreciates good air circulation. Deadhead spent flowers to encourage additional bloom. Borders, cottage gardens, prairies, meadows, native plant gardens or naturalized areas. Good cut flower.

Restoration notes

Habitats include black soil prairies, sand prairies, cemetery prairies, typical savannas and sandy savannas, thickets, openings in deciduous woodlands, woodland borders, gravelly seeps, banks of streams, and banks of ditches.

This species is commonly used in the following mixes: Wet Meadow Mix, Streambank Mix

Videos About This Plant

To learn more about this plant, check out our videos about it and its uses.

Save Your Stream! Introducing the Streambank Mix

Wet Meadow Mix | Native Wildflower Mix


Additional information

Weight N/A

Packet, Ounce, Pound


Full Sun to Part Shade

Seeding Rate

5 bulk lbs/acre


Average, Moist



Bloom Month

Aug, Sep


Yellow, Black

Specialty Uses

Landscaping, Cut Flower

Cattle Palatability


# seeds/pkt


Packet coverage area

5 sq. ft

Life Cycle


What is PLS?

Pure Live Seed (PLS) is the portion of good viable seed per pound. It is a measure of the seed that is alive and able to sprout into plants. This product is sold by PLS ounce/pound. To provide one ounce/pound of viable seed, you will receive more than one ounce/pound of product. Read more about PLS here.