I veg for 8 weeks, almost always ... plant is usually about 18"-24" tall at that point ... internodes are alternated, indicating it is mature for flowering ... anything smaller, I get small yields ... why he thinks 'taller plants make for less yield' is beyond me :wtf: ... I think he's smoking too much ... unless I misunderstood the question ... also, his comment that lamps only penetrate a 'foot or two', depends entirely upon the lamp, and spacing of the plants ... jointsmile: