Plant types and subtypes: Perennials, Biennials
Light Requirements: sun, part-sun, part-shade
Water Use: low
Soil Moisture: dry, moist, wet
Soil Description: acid, neutral, alkaline, rich, average, poor, loam, clay, sand, gravel/rock
Bloom Time: June, July, August, September, October, November
Bloom Color: yellow
Leaf Color: green
Hardiness Zone: 3, 4, 5, 6, 7, 8, 9, 10
Additional Tags: attracts bees, attracts birds, colonizing, cottage garden plant, cut flowers, deer resistant, drought tolerant, naturalizing, pond margin plant, rock garden plant, stream margin plant
Pricing & Availability
Rudbeckia hirtaAlso known as:
common black-eyed Susan,
Rudbeckia hirta flowers are probably the typical image that comes to mind when thinking of wildflowers. Though it is actually a biennial, we are also including it in our perennial category due to its ability to self seed and to establish permanent colonies. The daisy-like flowers are yellow with a brown cone-like center (eye) and about 3" across. These are smaller than most commercially available cultivars. Rudbeckia hirta may also be distinguished by its hairy leaves. Single flowers appear atop 1' to 3' stems.
Saying that this species is easy to grow could be an understatement, seeing that native populations have been recorded throughout the US in all but 2 States, and as far north as Alaska. Rudbeckia hirta is tolerant of drought as well as occasionally waterlogged soil. It does best in full sun, but can tolerate a considerable amount of shade. This species will bloom for several months. Depending on geographic location, the bloom period may begin as early as June and last until frost. Deadheading spent flowers will increase bloom production, however, this is a short lived species and some flowers should be allowed to go to seed in order to maintain permanent colonies. Zones 3-10
Allow plants to self seed. Collected seeds may be started indoors in early spring, or sowed directly outside after the last frost date.
Blackeyed Susans are very adaptable and versatile. Use them to create borders, colorful accents in a cottage garden or to naturalize in open spaces. A good cut flower in flower arrangements. Flowers attract nectar loving insects such as bees and butterflies, seeds attract birds and small mammals. Highly deer resistant.
Native Range & Classification
Recorded County Distribution: USDA data
AL, AR, CA, CO, CT, DC, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY
USDA Endangered Status:
- Endangered: NY
|Species||Rudbeckia hirta||blackeyed Susan|