Originally Posted by Blimey
I would only add....if in doubt....wait a couple more days.....males don't release their pollen the instant the pre-flowers appear.....you've got time to be 100% sure.
if in doubt you need to up your knowledge / spotting technique
who wants to water and care for a plant longer then they need if there not using it? waste of time, lighting, energy, money, nutrients....
here's a simple trick to know at first sight. females are spear shaped , and skinnier, males are more round, have what appear to be 2 small leaves on the side of the "ball", and closer to the node stem. just look at the plant when it's developing, keep it in your mind the shape, fuzziness and any other characteristic, and when you have male or females, apply that to all your plants..
I'm all for slow and steady, but there is no reason you cannot identify a male before it has clusters, or a female before it throws out hairs..