0ldTobyanswered grow question 3 years ago A cola is just the term for female flowering parts, with weed it tends to refer to the tops of the plant forming clusters of buds.
When the pistils appear that's the first proper sign of flowering.
Try scaling the recipe down to how much you want, if its for 100L and you want 10L use 10x less ingredients, it'll be the same end product more or less.