Judging by the looks of your plant u have about 3 weeks left, Your buds havn't really started to fill in yet, you'll see the buds start to puff up. The tricomes shouldn't be all that cloudy just yet, but its possible it just started. Im not sure about the 3-part formula, but just follow its recommendations, or some one here might have a better feeding routine, i recall seeing one a long time ago. Don't be hesitant to add nutes if things look good, chances are your PH was the problem.
http://www.gardenscure.com/420/attac...ient_chart.gif