Rudbeckia laciniata 'Herbstsonne' - 3Ltr is unavailable at this time.
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Picture by Steve Law from Henfield, England (Rudbeckia HerbstsonneUploaded by uleli) [CC BY-SA 2.0], via Wikimedia Commons
(Award of Garden Merit) Family Asteraceae
Wonderful with grasses.
Grow in moist but well-drained soil in full sun.
Eventual mature plant size :