New at growing.

wait till the plant is above 12 inchs then you can top it. cutting it on the top where it keeps make new leaves if you do it will branch out with two top wait a couple of weeks and top those then you will have two new branches on one of the stems. I Dont do this but some people do.

OK so its been a little while since I posted up on here. The plants looks like its going well. 2 leaves look a little burnt tho. Also a couple leaves look like they have yellowish spots on them. Not sure I'm supposed to repot yet? Looks like its doing ok. Here are a few pics. Let me know what you think. Also. Its on 18/6 how long usually will this cycle last for?

Cheers

looks good n healthy, should be a couple more weeks at least until you repot. keep it on 18/6 until you decide to flower, in which case you will have to switch to 12/12. You should probably just repot when you put it into flower.