Northern Lights Auto

Does anyone know how wide NL Auto tends to get? I'm considering using it in a SOG. I see that it can grow to between 90 and 120 cm. Just wondering how many I can have per square foot.

Do you think 1 per square foot would be acceptable, or should I give it more room to breathe?

Never mind. Dumb question. A 3 ft tall plant isn't exactly right for a SOG.