How do I tell if my marijuana plants are flowering to soon?

There he/she

male plants are smaller, thinner, seedier, have smaller leaves (overall they suck). The females on the other hand are bigger, thicker, grow bigger leaves (those are the ones you want)

Whoever said plants dont have genders is very wrong,many plants have genders including marijuana. The only way to tell if it is female or male is little white hairs for a female and little ball like...

its has bananas not buds

Preflowers, as opposed to full-blown flowers, generally appear after the fourth week of vegetative growth from seed. Check carefully above the fourth node. Please note that preflowers are very small...