Gloriosa Daisy, Black-Eyed Susan, Brown-Eyed Susan, Etc, Etc.
Rudbeckia hirta ‘Denver Daisy’
Rudbeckia hirta L. is the correct and accepted scientific name for this species of Rudbeckia. It was described by Carl von Linnaeus in Species Plantarum in 1753. The 2013 version of The Plant List names 3 accepted infraspecific names (varieties) of Rudbeckia hirta.
This Black-Eyed Susan cultivar was bred by crossing native Rudbeckia hirta with Rudbeckia ‘Prairie Sun’ by Ernst Benary Seeds to commemorate the 150th anniversary of Denver, Colorado.
I bought three Rudbeckia hirta ‘Denver Daisy’ to add to the south bed I completely worked over in 2017. I found them at Wagler’s Greenhouse on 7-1-17, among other plants, while I was looking for plants specifically for the south bed.
I always transplanted seedlings from the Celosia spicata ‘Cramer’s Amazon along the wall and seedlings of the Talinum paniculatum (Jewels of Opar) for the front of the bed. There are two Crape Myrtle in this bed which I would like to pull out because they get so big. In 2017, I kept their sprouts cut off and after a while, they stopped coming up. Of course, they will be back in 2018. In 2017 I also transplanted seedlings of the Marigold ‘Brocade’ along the front of the bed… The plants I bought from Wagler’s were put in the center row. As always, the Celosia ‘Cramer’s Amazon’ grew 8-9 feet tall, but the Marigold ‘Brocade’ grew larger in this bed than where they usually are. Maybe amending the soil with decomposed cow manure was the reason. Anyway, I will limit the amount of Marigolds I transplant here in 2018. They always self-sow, so that could be a problem…
Rudbeckia hirta is a native wildflower in most of the United States and we have an abundant supply on the farm. They are very drought tolerant, but cultivars planted in flower beds appreciate a little extra water off and on. You for sure have to water them until they get well established.
They like the sun and if you plant them early enough they have no problems once the heat of the summer arrives. If you plant them later, you may want to put them somewhere they will receive afternoon shade.
Family: Asteraceae (Compositae)
Origin: Cultivar from Binary Seeds
Zones: USDA Zones 5a-9b (-20 to 25° F)
Size: 18-20” tall x 12-18” wide.
Light: Sun to part shade
Soil: Average, well-drained soil.
Water: Average. Drought tolerant once established.
Maintenance: Deadhead for continual flowering.
With the Celosia spicata ‘Cramer’s Amazon behind them and Jewels of Opar and Marigold ‘Brocade’ in front of them, the Rudbeckia ‘Denver Daisy’ almost became covered up. I had to do some trimming so they wouldn’t completely disappear.
The Rudbeckia hirta ‘Denver Daisy’ was a great performer and flowered until the temps started getting colder. We shall see if this plant has self-seeded for 2018.
There are numerous cultivars of Rudbeckia hirta you can try and they are available at garden centers and many sources online.
I hope you enjoyed this page and maybe found it useful. If you have any comments, questions or suggestions, I would like to hear from you. Please click on “like” if you visited this page. It helps us bloggers stay motivated. 🙂 You can check out the links below for further reading. The links take you directly to the genus and species of this plant.