I am in my first serious grow ever, besides two weak attempts. Anyway I have been looking in this book and online to find out how long into the outdoor grow should I be able to tell the sex. And I found out sometime shortly after flowering, but not exact. And they say I can tell if they are m/f because either the nodes will be alternating(f) or opposite(m). What does that mean? Because all i know is what the nodes look like not if they alternating or whatever opposite means? THX