As promised here is a look at the different kinds of Black Eyed Susan we grow. Rudbeckias are North American natives and are great for your cut flower garden.
Number one is, of course, Goldstrum. This is the one you see all over town. At about 2.5-3’ tall and loaded with 3-4” gold blooms, Goldstrum puts on a reliable show from mid summer into the fall. It does tend to get leaf spot but that doesn’t affect its ability to flower.
This is our most petite Rudbeckia. ‘Little Goldstar’ is only 16″ tall and more resistant to leaf spot than ‘Goldstrum’. It has a mounding habit that looks great towards the front of the garden.
One of my favorites is ‘Herbstonne’. We have 3 of them planted by the north driveway and they are gorgeous. They get about 6′ tall so pick your site wisely. They are great as a backdrop for your shorter perennials.
‘Viette’s Little Suzy’ has bright yellow blooms and lance shaped leaves. Although it only gets about 18″ tall, the flower stems are long and sturdy.
Another one of my favorites is Rudbeckia triloba, Brown-eyed Susan. The flowers are smaller than other Rudbeckia but there are so many that it looks like a golden cloud when it blooms.
Rudbeckias are also available as biennials and annuals. I have Rudbeckia hirta in my garden and I love it. Mine has been blooming since early July and it is still going strong. The flowers are at least 4″ across and they look great in a vase for at least a week.