(August) I have collected seed from my hardy hibiscus and four o'clocks. When and
how do I plant them?
For the four-o'clocks, you may want to go ahead and scatter some seeds now. The plants won't have a chance to bloom this season, but hopefully there is enough growing season left for them to establish a root system and come back next year. You can also scatter some seeds out next spring after frost. On the hardy hibiscus, save the seeds to either start indoors in late January through February or plant them outside in late April. Soak the seeds overnight before sowing. They like warm soil to germinate. Don't expect flowers in the first growing season.