I've grown out Deadhead, Tahoe, Pre98Bubba, Chem4, JMC, & Sour OG.
Sour OG was the only cc strain that was 100% herm free!!
The other strains would show pollen sacks very early in bloom, say around 2 -3 weeks. The pollen sacks only grew out of earlier lower pre-flower sites. (if that makes any...