The top of your plant is not totally dark but the bottom is, so only the bottom is flowering. That is my guess.its bag seed and some of the lower branching formed colas but the top(or highest) branch is not really forming a cloa its just leaves and branches
This is interesting thinking. I'm not sure it is possible to have one part of the plant in flower and one in veg still?? I'm not saying it cant be done, I have no idea, but it got me thinking... I would be interested to see if this is the problem. If it is, then u could essentially cover a branch with something lightproof for a few hours a day (to get the light schedule to 12/12 just on a single branch) to sex it while it is still in veg?The top of your plant is not totally dark but the bottom is, so only the bottom is flowering. That is my guess.
Sometimes a light leak can be through some duct or a hole used to mount a light. Get in there with the light off and check the darkness.
see this thread posted a few days ago:This is interesting thinking. I'm not sure it is possible to have one part of the plant in flower and one in veg still?? I'm not saying it cant be done, I have no idea, but it got me thinking... I would be interested to see if this is the problem. If it is, then u could essentially cover a branch with something lightproof for a few hours a day (to get the light schedule to 12/12 just on a single branch) to sex it while it is still in veg?