The tag from the grower says Helianthus salicifolius. This is a misidentification which the horticultural industry has been doing for years and years. The plants are definitely H. angustifolius. We offer the true H. salicifolius as well and you can see the differences in the foliage. H. salicifiolius has longer, more wispy foliage than H. angustifolius.
Aster family (Asteraceae)
Updated 30 September 2023