David, I germinated my very first plumeria seeds (two) that last week in December and the first week in January. With proper inside conditions (easy stuff), apparently you can germinate seeds any time you wish. I don't know a thing about seeds, what's good, what's not so good. My seeds were all donated. Others who grow plumeria, particularly those in S. CA and FL, can give you some suggestions on what seeds to look for.