Seeds have a short viability period and should be seeded quickly after harvest or stored in an air tight contained in a refrigerator. Reported to need light for better germination.(#40) Plants take two years to flower from seed,
Cultivar Origin
Discovered by Barry Yinger in Korea.
Notes & Reference
#40-Herbaceous Ornamental Plants, #51-Armitage's Manual of Annuals, Biennials, and Half-Hardy Perennials