Rudbeckia laciniata 'Herbstonne'
'Herbstonne' is one of the taller Rudbeckia. Unlike its prairie relatives that prefer almost drought conditions, it thrives in a moisture retentive soil and will even cope with soggy areas.
Ours are planted next to Gunnera and Rheum palmatum in the bog garden so that they thrust upwards between the giant leaves.
The tall bright yellow flowers look amazing but the foliage can get a bit scruffy so either put it at the back of the border or surround it with tall iris and other large perennials.
It should not require staking unless planted in a very exposed site.
Photo: Blackstem Plants
Heavy, moist but well drained
Full sun, partial shade