When to collect Bachelor Button seeds
I understand how to collect Bachelor Button seeds, but I don't know when to allow the flowers to remain. So far I've been deadheading my Bachelor Buttons to keep them blooming as long as possible, but how do I know when to stop deadheading?
I'm not at all sure just how long they'll continue to bloom with our summer heat (temps staying in the 90's with hot nights).
Thanks for your help!