ZW- I have to disagree with saving the hermi pollen as this is the primary means that seed companies "feminize" their seeds. What that means is the seeds that sprout have a higher than average chance of being female BUT ALSO a higher than average chance of being hermi. Most, if not openly displaying banana dicks during flowering, will stealth spread pollen by a solitary, hidden pod. You will never have a sensi crop as such.
IMHO, feminized seeds (through hermi repollenating) is the bane of the medi grower. Hermi genes have almost entirely corrupted the existing gene pool. With many of the "regular" seeds, anymore one is likely to have hermi crossover. It sucks.
The only way to truly get feminized seeds is to treat with colchicine, if I recall properly. This is a poison & kills like 98% of all the treated seeds. However, the remaining live ones will be female. No seed company that I know of utilizes this timely & costly procedure. Femi seeds suck. Best.