When shld flower?

ah topping is never something ive fully understood how to do, im not quite sure where exactly to cut. mm its tempting to transplant, would probaby delay the flowering by some time though?
how much do you think my plant would yield if it stayed in the current pot? its 36cm tall now, will probably reach 70 cm by the end of floweing, i dont have much room left if it were to get any taller than that lol.

today! the leaves have perked up nicely since fertilising, plus a couple of leaves had slightly yellow tips which are now green again, hurray!

39cm today!