do you mean that you want to keep it under a 2 litre bottle or planted in a 2 litre bottle? i have a small male for that purpose planted in a half gallon pot(real close to a 2 litre) and it is doing fine. it showed sex a month later than the same plant in a 2 gallon pot(exact same plant since it is a clone) and the one in the big pot is about 3 1/2 ft tall and the other is slightly less than a foot tall. i hope this answered your questions. the big boy is getting the chop today since i have its little brother.