GrowCNanswered grow question 3 years ago My tent is 90x90 and I feel it is just right to maybe a bit tight for 2x2 planting but I think 80x80 would be acceptable especially if you are tight on space. My first tent was 50x90 and two auto's did very well in it. I like to give my plants more space than what some recommend. For me I want there to be 5-10cm gap between the plants and the edge of the tent for airflow to the bottom side of the plants (some breeze up the lady's skirt). But, many growers do well with plants hard against the sides of the tent.