Rudbeckia Hirta Seeds - Black-eyed Susan

Flower Specifications

Approximate seeds per pound: 1,710,000

Season: Biennial

USDA Zones: 3 - 9

Height: 24 inches

Bloom Season: Late summer and fall

Bloom Color: Golden yellow

Environment: Full sun

Soil Type: Any soils that are not too dry, pH 5.8 - 6.8

Deer Resistant: Yes

Latin Name: Rudbeckia Hirta

Planting Directions

Temperature: 70F

Average Germ Time: 7 - 30 days

Light Required: Yes

Depth: Do not cover the seed but press into the soil

Sowing Rate: 1/2 ounce per 1,000 square feet or 2 pounds per acre

Moisture: Keep seeds moist until germination

Plant Spacing: 12 - 18 inches

Care & Maintenance: Rudbeckia

Black-Eyed Susan (Rudbeckia Hirta) - This familiar, yet gorgeous golden yellow wild flower is often seen growing in large colonies along highways, in fields, and in many natural settings. Black-Eyed Susan easily establishes from Rudbeckia Hirta seeds, and it produces clumping, stiff, upright plants that are short-lived. Rudbeckia Black Eyed Susan is native to the eastern United States and is probably the most common of all American wildflowers. They have the characteristic dark brown, domed center which is surrounded by bright, golden yellow petals. Black-Eyed Susan wildflowers thrive in most soils, in full sun, and they forgive neglect.

Golden yellow blooms

Black-Eyed Susan grows perfectly in gardens, in borders and in flower beds, and it is a great summer time bloomer. The golden yellow blooms are a major color-maker in any wild flower garden.

Flower seed | black-eyes susan

How to grow

How To Grow Rudbeckia hirta From Seed: Sow Black-Eyed Susan wildflower seeds outdoors any time in the late fall or as early in the spring as the ground can be cultivated. Prepare soil by loosening the top 1 - 2 inches and removing any weeds. Sow the Rudbeckia Hirta seeds into the loosened soil and rake in. Walk over the area to gently press the wildflower seeds into the soil. Keep the Black Eyed Susan seeds moist until germination.

Rudbeckia plants transplant well and should be spaced 12 - 18 inches apart. The Black Eyed Susan plant forms a clump that will reach 12 inches in width. Considered a biennial, it will not bloom much the first year the flower seeds are sown. The following year will bring many more blooms. The seed is small, but it is considered to be very easy to grow.

Sowing Rate: 1/2 ounce per 1,000 square feet or 2 pounds per acre
Average Germ Time: 7 - 30 days
Keep moist until germination
Attracts bees and butterflies
Depth: Do not cover, but lightly press seed into soil