Rudbeckias are some of the most robust and attractive plants around. They are no-fuss plants that require little more than average soil and full sun. The pollen and nectar of these plants support many different pollinators and beneficial insects (yay!!). North America hosts many native species of Rudbeckia and I seem to love them all. In my own garden, I grow no less than six different types of Rudbeckias. Here are four of my favorites:
Rudbeckia lanciniata, the tall coneflower, cut leaf coneflower, or green-headed coneflower, is one of the tallest Rudbeckias. Topping out between three and twelve feet, cut leaf coneflower has divided leaves and four-inch wide flowers that have green, cone-shaped centers and yellow, downward curved petals. It is native to nearly all of North America. I grow mine in the back of my perennial border where it can stand watch over all the other plants I have growing there.
Rudbeckia fulgida, the orange coneflower or black-eyed Susan, is a broad-ranging eastern native that has become a ubiquitous garden species. It has many varieties and cultivars. The yellow-orange petals and dark central disks are produced on plants reaching one to three feet tall. The leaves have fine, bristly hairs. The only trouble I face with this plant is its tendency to develop leaf spot during wet seasons. This fungal disease creates dark blemishes on the foliage, but doesn’t seem to affect the flowering. Because of this aesthetic issue, I’ve removed this plant in all but two areas of my garden and replaced it with other Rudbeckias that are less prone to developing leaf spot.
Rudbeckia hirta (shown in the main image above), annual black-eyed Susans, are often treated as annuals or biennials in the landscape. They reach one to two feet tall and have very hairy leaves and coarse stems. There are many varieties and cultivars of this species; some bearing yellow petals while others have petals with various combinations of burgundy, orange, brown, and yellow. There are double-petaled forms as well. My personal favorites include ‘Irish Eyes’, with its green center, and ‘Indian Summer’, with its bright yellow petals.
Rudbeckia triloba, brown-eyed Susans or thin-leaved coneflowers, are an eastern and southern species. Of all the Rudbeckias, triloba is my absolute favorite. The basal leaves of this plant are often trifoliate (meaning they are comprised of three leaflets joined together). The plants are multi-branched and reach two to three feet in height, lending a dense, bushy appearance to the plant. Each flower measures an inch or so across, and the entire plant is completely smothered in flowers by late summer. Though R. triloba is considered a short lived perennial in most areas, it is totally worth growing. I will not garden without it!
Do you have a favorite Rudbeckia variety? Tell us about it!