Is It Time to TOP ?

Chop it. Or don't. Do things you haven't done yet. Try it all and figure out for yourself what you think is best. It's all opinion really. You can chop it. But also where? Pretty much where ever you think is best. I normally chop at the 5th or 7th node. That way I have 4 or 6 mains to work with. Not including the first nodes. Those normally get chopped but other times they reach the top with the mains. For the yellowing: work on your watering practices. It looks like you're using a good organic soil, I could be wrong. But they need the water to get to the nutrients. If you're not watering enough and deep enough then they'll struggle to find what they need. Water more at once, less often. Rather than more often but little amounts. Best of luck dude. Just keep learning. I started playing around with pollen and breeding recently. I keep thinking there's nothing new to learn and then I find myself being a complete noob at something. Lol Just keep going. It's a fantastic hobby.

yeas, highest time for topping ^^

Yes, topping now is possible. Just cut the top off with a nice sharp knife, scissors will damage the stem by squashing it. Leave about an eighth of an inch/4mm stump above the node you decide to cut off. Do not remove leaves, leaves provide ALL of the energy for a plant to grow...............reduction in leaves = reduction in growing.

Hello. When topping just take the top off and leave all the other leaves on. The leaves will help the plant to recover the topping quicker than if it had no or very little leaves. The topping is to encourage branch growth for multiple tops. So wait a week for the plant to heal then you can take off some more leaves... "if you feel you need to". At this point you just need to take off leaves that don't get light... on the very bottom. I use sulphur on all my cuts, to heal the cut faster. It also stops the sap from flowing (bleeding) when you top them. They sell agricultural grade sulphur at most garden centers and medical grade at most pharmacy's. Should be easy to find. Good Luck.

It’s time!! When the plant reaches 5 nodes (levels), you can cut the top. Leave only the 2 branches and 2 leaves on the 5th node, and cut off all the other leaves as well.