Answer: October is the prime month, so yes, you can wait until late October. November is okay as well, but your goal is to get seeds to germinate while there is still warmth in the soil and then winter rains can help plants develop. Soil temperatures drop in late November and December and seeds are less likely to germinate. Also, you don't really need to plant wildflowers in garden beds. They do great sown in just a landscape setting, or scattered in gravel mulch, so consider that if space is limited. Good luck!
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