When to flip

You can go 12-12 from seed if you want, but the plant won't begin to flower until it has sexed itself..usually 4-6 weeks depending on genetics..pre flowers will form at the base of new branches when it's ready to flower, coincidentally the node placement will go from opposite to alternate as well.. cheers

In optimal conditions, plants should be kept in their vegetative stage for approximately 60 days. This time period should give the plant the opportunity to maximize yield and acclimatize to growing conditions.

It's up to you mate! Depends on how much grow space you have, if you want to fill the whole tent or not. You could wait on those smaller one to get bushier and then flip the switch, it will get bigger after that too.