Rudbeckia Flower First Year. Two of the most common species in the genus are Rudbeckia hirta often known as black-eyed Susan and R. It will flower in its first summer but it can take two to three years to reach full height.
Generally Rudbeckia will not flower until its second year after seed germination. Although I have had Brown-Eyed Susan bloom the first year Rudbeckia Triloba. 23042021 You can plant it after the last frost in spring.
They said if you get these started in January theyll bloom for you by July.
Sullivantii Goldsturm bears wide black-eyed single yellow daisy flowers with cone-shaped black-brown centres from August to October. Sullivantii Goldsturm bears wide black-eyed single yellow daisy flowers with cone-shaped black-brown centres from August to October. Its chartreuse-to-medium green foliage has a feathery fernlike appearance that enhances gardens even when the plant is not in bloom. Commonly referred to as coneflowers or black-eyed Susan they flower from late summer to the first frost.