When To Top

When do i top my plants there at 16days now here is a few pics
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and when could i take a clone or start to clone?

you can top when ever you want really, there is a sticky somewhere about topping by uncle ben if u search for it!!!

will be a couple of weeks before ide consider taking a clone from them!

I'd top after the 4-5 node but it depends on what you need/want and the space you have. You can start taking clones when the plant is 1 to 2 months old but it obviously depends on the light and other factors.