In terms of the effects of the cannabis in smoking/vaping/edible form. Harvest time matters and makes a difference in the effects. Early harvests = more speedy less body psychoactive effects, later harvests offer more balanced sedative effects. Too late of a harvest can offer too sedative of effects without the desirable giddy psychoactive effects.
There's quite a bit of science behind cannabis cultivation, but merely knowing some basic essential trade secrets makes all the difference in the final product ;D