Shagrathanswered grow question 4 years ago Hi!
No need for topping anymore at this point. I'd say if you want to control the growth just use LST now, if you bend the top lower than the mid part, the hormones will make the mid part grow more.
And probably the reason for not gaining height so much is that you have been training them and it has become more bushier now 'cos the plant don't know when veg time ends until you flip the switch to 12/12
Happy growing!