Weather or not the plant will start to actually "Show" (Sprout pistils) preflowers seems to be a mystery concoction of environment, age, strain, and eye of newt.

the more reading I do the more I read threads where the grower wasn't able to sex until week 2 of flowering :wtf: where in my room there's no doubt about sex by about 6" tall. I quite literally have pistils over 1/4" on most all of my strains under 18/6 lighting.