Well I thought id share what I know on this or have read understood seen ect. Anyway plays that's tall and up top heavy Christmas trees or shit like critical 9 to 16 a m2 or squared meter and shit like widow is how a site I was reading put it wide plants that do better bushing or scrogs you go 4 per m2 and thats how they figure it. Hop e this helps someone see alot of people asking.