yes its a little small, the general rule of SoG putting them right into flowering after clone or from seedling is 4 per sq ft. any more then that and your really pushing it, just stop at a home depot and get some 6" pots and see how many u can cram into your grow area. With a 250w i have 7 under it no problem, going to up it to 10 or 12 soon as well