Hi Al I have a 140x140x140 atic tent how many pine...

4 plants in 3 gallon geopot's is your best bet for the amount of light you have. The Pineapple Express from FastBuds can get pretty big.

Thats a lot of space, wow. As my kollegues already said you can put some more in it. personally me would go with 3 or 4 more Plants. to have enough space to arrage something and plants got enough space to spread. Wlcome and happy growing

hey man, bigger pots means bigger plants, in that size you can go 6 ten gals or 9 five gallon pots comfortably. i would go with the 5 gallons because the truth is these autos wont be able to fill the 10 gals. Simple ! 🚀

For the number of plants, you calculate between 1 sq ft and 2. In this case 140 cm * 140 cm equals 4.6'* 4.6' = 21 sq ft, so you could place between 10 and 21 plants. That been said, light wise you need at least 50 to 60 watts per sq ft, which means 1000 to 1200 watts of HPS, which means double what you have. I would use a space in that tent of 1m * 1 m and place 4 to 9 plants, that will give you good buds, else if you try to use all the tent with that light, the buds will be as full as you would want.