One per pot, or they'll kill each other vying for the same water and ferts and light. Only one. they look healthy and a 6'x5' sheesh! you could get 20 plants in that space if all those containers matched! see my room! I have 20 plants tucked in there, all in milk jugs in a 3x4' room with a 7' high ceiling. my room could fit into your entire area and not touch the walls. so proper planning and thinning will go a long way now, rather than getting root entanglemnet later and have to kill all the healthy plants just 'cause their roots are so entangled with the others in the same container. space is important. of you are goign to invest the time and money in growing, do it right. No money involved here just sdome planning,cleaning