my annuals went two good years (after seeding) but petered out this spring due to extremely dry conditions. i have the same question and worries about next year. i am hoping that a certain percentage of seed just decided not to germinate this year, but will remain viable for a (hopefully) good spring next year.
i see in the lupines and CA poppys that seeds can last many years waiting for the optimal conditions, i cant speak to other varieties though.
