Ah, they're looking beautiful, Amstron!

About that one plant growing faster than the others. While it may be male, you can't accurately determine a plant's sex from it's growth rate. I've had males that have grown slow and showed their sex last, and I've had females that have grown fast and showed their gender quick. It's all in the genetics.

It's good that they're showing alternating nodes, that's a sign they'll be showing genders within the month, or even sooner if you decide to throw on an extended night schedule. Keep in mind, though; they're going to stretch a bit, and they will put on extra nodes so that will add to their height as well.

Can't wait to see them when they've got buds.

Keep up the great work, Amstron.