South-Central United States
China, Eastern Asia, Japan
Penstemon digitalis, Penstemon barbatus, Penstemon heterophyllus
Platycodon grandiflorus Astra series, Platycodon grandiflorus Fuji series, Platycodon grandiflorus 'Komachi', Platycodon grandiflorus 'Sentimental Blue'
No Available
A1, A2, A3, H1, H2, 1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24