Can You Grow Rudbeckia From Seed. Sow seed THINLY in modular cells filled with a good quality compost. The term is also commonly used for herbaceous perennials which grow for many years To compare.
Also studies have shown that Black-Eyed Susan seeds should be cold stratified or winter-sown to achieve a high germination rate. As the blooms dry back you can place a paper bag over the top of the black eyed susan flower and shake the seed head into the bag releasing some of the seeds. Seedlings blooming in 6 packs.
Annual one year biennial two years.
Seeds will take around 14-21 days to germinate. But take care to not plant them too deep. Cover seed very lightly as light is needed for germination. If youre starting a new patch plant them in fall or for spring plantings treat them to a period of cold stratification for 30 to 90 days prior to sowing.