Number two... The furthest black pot one.... Is st...

Marijuana, no matter the strain, shows a very strong apical dominance, unless TOPed or trained and once you hit the stretch (3 to 4 weeks into flower), the main top will outgrow all other colas. At this point I would strongly recommend applying supper cropping to the main cola to keep it at the same height of the other tops. Also for HID lights, you should have around 60 watts per sq ft; less than that and plants will stretch looking for more light.

I also recommend to tie her before its too late. Bend her gently till the main stem is nearly horizontal to even her with the other bigger plant. If nothing helps you also can consider to cut her top but that´s to try as a last resort. Take some cord and a weight or tie it to your pot and bend her down, preferred to the middle of tent. Raising your light higer affects all other ladies who maybe don´t get enough light.

Hi @BrownRecluse! That plant is probably asking for more light, I think your coverage is not perfect yet and 1 centered HID is not enough for 2 monsters. Stop raising the light up and start pulling the plant down, by using strings or any other support. Consider supercropping if you reached your maximum available height. Otherwise, think of a better light coverage for your next run, some LED panels/boards could have a better penetration and a lower consumption. Hope this will help, let me know in the comments section if you need any further information. Happy growing! 👊

Huge plants you got there...to me it looks like you need a bigger tent.... they are in week 4 of flower there will come alot more Plantmatrial. and you may get a humidity problem if your tent is so stuffed. For the moment ift is enough to do some HST on her and bind her down... but for the coming weeks i really recommend you to get a bigger growspace

Not all the seeds are going to grow the same. Even if it's the same strain you will have different phenos within a strain taking on different characteristics of family tree. If you need her to stop stretching all u have to do is lst gently pull that big branch down to the side with plant tie. This is the last chance to do any training. Lst will not hurt her just try to even it up with other plants or get close.

Stop moving the light up because the plant is stretching to it. Every time you move the light, the plant grows up towards it. Instead, take that plant and tie it down at an angle around the same height as the others. This will also expose the bud sites to more light and help their growth when it's time to fatten. Use a soft garden twine or soft-wire around the stem and be careful to bend it slowly as not to snap it 👍