i boughtDepends what sort of autos you got, some get bushy so a sq. foot is required and others are simply a single cola once flowered. Work on a plant per sq. foot to 1.5 sq. foot.
www.dutchbreed.com have some crazy autos...I get mine from here.
Where did you buy these from and are they "short stuff" or standard auto versions? If they are standard I can imagine them wanting more space, it's better to give a plant plenty space so it can branch out, grow to it's potential and give you more yield in the end. I suppose they could fit but would you want to cramp them? The point is to grow some bud so you don't need to germinate all of them at once......unless of course you intend to help out friends etc.i bought
automatic AK47 X1
automatic lemon skunk X1
automatic blueberry X1
automatic bubblelicious X5
you reckon theyll all fit in there