How many autoflowers?

Hey, i am currently running 2 automatics in 15l living soil on 0,32 square meters. That would equal 6 automatics/square meter. Your tent is 2,88 square meters, meaning that it would be fine for 18 plants in my case, with 15l pots. You may have bigger plants with 25l pots, but you can still cut off what is too much. If you want to be safe, you can consider going down to 12-15 plants, or use less soil. Good luck!