its interesting that sensa spray says weeks 3-4 of veg
la femme says to use before flowering, but if you wait until you have male preflowers, then its too late to apply anything to change it then.
i read that to get your best chance of females, NEVER stress in weeks 3-4
therefore i am running on a theory that plants decide sex in weeks 3-4 veg. much like humans dont sex until very late in the womb (last month or something i think)
anyway im going to plant 9 seeds (i only have room for 9) and im going to use 2 products.
a seed soak to use before germinating seeds, and la femme at weeks 3 and 4 after germination.
grow journal to follow.

http://cgi.ebay.com.au/ws/eBayISAPI....B:EOIBSA:AU:11
Flower Seed Soak stimulates the seed to have a tendency to become a female plant. After 24 - 30 hours treatment, simply plant the seeds as normal.

http://www.petshopboyz.com.au/Produc...=2&stockNo=188
La Femme is a female sex change hormone which induces predominance of female flowers. It is most effective when used as a foliar spray at a dilution rate of 5mls per litre of water during the initial flower bud formation or the change of daylength or flower induction. Follow up spray one week after the first application. Spray until run off is acheived