For 90x60 in Sea Of Green i have 4x2 8 plants 6 to 7 L pots
With 100x100 in SOG i would suggest either 4x4 16 plants 6 to 7L pots either 3x3 9 plants 11 to 15 L pots
here a good article you should have a look:
https://www.royalqueenseeds.com/blog-how-many-plants-to-grow-per-square-meter-n774
you can also check growers like Leonweed and daisynabis on growdiaries i you want to see what a good SOG look like.