by OCMGA Master Gardener Tom Wentzel
Rudbeckia Herbstonne is a very dramatic background plant. This specimen is 6 – 7’ tall and as you can see has the advantage of flower on the upper 1/3 of its height. Therefore it does not interfere with foreground plantings.
It is a carefree plant. It does like rich well drained soil and will tolerate some draught once it is established. This plant in my garden was planted as two clumps about 5 years ago. The clumps have since grown together. Although it is does spread by rhizomes it general stays in its clump and is easy to control. Deer and rabbits tend to leave it alone but insects and birds love it.
With a little dead heading it will bloom from late July into fall. I leave the stalks in place for winter interest.