To get 4 main colas, let your seedling or cutting (clone) grow to about 5-6 nodes and pinch out (cut) the stem just above the 2nd true node. The node where the cotyledons attach doesn't count.
I cut above the first 2 big sets of leaves and I got 4 main colas. If your worried, go up even one more, worst case scenario you get more than 4 colas. Good luck
To get 4 main colas, let your seedling or cutting (clone) grow to about 5-6 nodes and pinch out (cut) the stem just above the 2nd true node. The node where the cotyledons attach doesn't count.