Sure, petunias will wintersow. BUT the some seeds are expensive and do realize that most petunias take 8 to 12 weeks to bloom from sprout stage. Also, with petunias, many varieties are daylight sensitive to forming buds, so if they start blooming in August, they will wind down quickly as the days get shorter.
Petunias would not be a ws choice for me, but to each their own.
