The bigger two have been in veg for about 2 months, the other smaller 2 about 1.25 months. I have successfully figured out the two smaller and the biggest ones are females from seeing the white hairs. But the one I'm still unsure of is the short and bushy one. It seems to be a different strain than the other 3.

And yeah Garden Knowm, there really aren't any alternating nodes. I mean even on the one's that are 2 months old. But they for sure have to be mature enough to flower..right?