Rudbeckia flowers are relatively easy to propagate and grow from seed. ... Also, studies have shown that Black-Eyed Susan seeds should be cold stratified or winter-sown to achieve a high germination rate. The seeds from all Black-Eyed Susan need to go through a winter in order to achieve a high germinate rate.

Is cold stratification necessary?

The good news for gardeners is that the natural cold stratification needed for germination can be forced with just a few materials, water, a refrigerator, and patience. If you're planting native wildflowers or varieties that require cold stratification in the fall, this step isn't necessary.

How do you germinate Rudbeckia?

Cover seed very lightly as light is needed for germination. Harden-off seedlings and transplant out after danger of frost has passed. Bottom water or mist to avoid covering seed. Direct seed - Surface sow 2 weeks before last frost.