a perpetual grow really just means you have a continuous and ongoing grow. Having plants in all stages of growth at any given time. ie. staggering yr grow cycles...having clones that are rooting, and others that are vegging, while others are flowering. Thus saving time, instead of waiting for a seedling\clone to root, then veg, and then finally flowering individually each time, you follow? so you save time which equals more bud. You just need seperate spaces for each cycle.