From Diane W. "Autumn Winter Seed Sowing in Six Easy Steps-- Wild Seed Project

AUTUMN & WINTER SEED SOWING IN 6 EASY STEPS 

This is a simple, no-nonsense method to winter sow native seeds from the Wild Seed Project. It is the easiest and cheapest way to add plants to your garden. In spring once you see that roots have developed divide them and plant them into your garden observing right plant-right place. When plants are sown this young they are able to adapt if conditions vary. Plant them close together. The hard part is waiting for them to mature. Some will flower in the following season; some will take several seasons. When they do bloom the reward surpasses any plant you may have purchased in a quart or gallon sized pot from a Garden Center. Approach your project with a spirit of experimentation. The only guarantee is that you will learn a lot about seeds and plants. See the link to the article below.

Diane Woodward, IGC Horticulturist

See the article here: https://wildseedproject.net/blog/ideal-time-for-sowing-native-seeds