Surprise Sativa in my White Rhino's? (Pics)

So, I now have three plants total (the fourth was a boy) and all three have clearly sexed female. They are about ten days into 12/12 flowering. Two are definitely feminized White Rhino seeds from Nirvana and one is a "free" Nirvana seed. Obviously the plant that is far taller (first few pics) is the unknown strain. It has a lot fewer branches/leaves than the White Rhinos do and I think the leaves look longer and thinner. It is clearly female, but doesn't have nearly as many pistils as the White Rhino. Any chance this is a pure Sativa? I'm also wondering if I should top this thing. The top of the plant doesn't look at "healthy" as the White Rhinos do (little bit of light burn) and I can't imagine how tall this thing is going to get during another 8-10 weeks of flower. Not sure if topping her will hurt anything or help - just wanted to see what the general consensus was on this plant since it's so much larger than my other two.

I've attached some photos. The first few are focusing on the bigger plant, the rest are primarily the White Rhinos.

Topping, FIMMing, LST or supper cropping would definately help keep the canopy even. My advise would be a combination of LST and super cropping. Start LST now and super crop a few weeks after 12/12 to even things out. Wouldn't say thats a 100% sativa but definately looks more Sativa than those WR. Might just be an F1 hybrid that is taking off like crazy as well. From what I understand quite a few seed companies give F1's out as freebies. Might be the killer new strain of our age, better grow her with caution.

Thanks for the advice. When you say LST, you would just LST the tall one, right? The WR's are nice and stocky and I'm not inclined to do much to them except keep them trimmed up to focus on top third of plant.

Thanks bro!

Gastanker said:

Topping, FIMMing, LST or supper cropping would definately help keep the canopy even. My advise would be a combination of LST and super cropping. Start LST now and super crop a few weeks after 12/12 to even things out. Wouldn't say thats a 100% sativa but definately looks more Sativa than those WR. Might just be an F1 hybrid that is taking off like crazy as well. From what I understand quite a few seed companies give F1's out as freebies. Might be the killer new strain of our age, better grow her with caution.

Click to expand...

white rhino is nice smoke i have some right know drying out
good luck bro

I guess I need to figure out exactly how to LST. This is my first grow and I don't want to get too complicated - so far, so good on these girls. Is it as simple as simply making a hook, sticking it in the dirt and bending the plant down/inserting the top through the hook? Will I need to do this multiple times? I just don't want to do anything ridiculously stupid, but I'm also worried this plant will get way too tall relative to the White Rhino's.

Yes, just LST the tall one. It is as simple as making a hook in some wire like you said and slipping it over the top of the plant and then attaching it to the pot. I wouldn't suggest anchoring it into the dirt as the plant will pull it out and you might damage some roots. You can also kink the plant at a 90 degree angle (supper crop). If you do this make sure to take your time as not to snap the top off or damage the plant too much. If done right it will cause the plant to bush out and the portion after the kink will blow up with bushy growth as well