The multiple colas thing is that if, while the plant is still vegging, you top off the growing tip of the plant, it will cause the plant to branch, and produce 2 growing tops. When you flower, each of the growing tops will form into a cola (group of buds), giving you two main colas instead of one, but they won't grow as big or fast, so it's more suited for growers with a limited growing height.

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All drug prisoners are political prisoners, where are the UN to protect THEIR human rights?