So i'm on my first grow, i'm growing super lemon haze in soil under a 600w mh. Right now my babies are 6 days old from sprouting and still in veg pots. I have ready 7 litres (2 gallons) pots for transferring them but i understand that it's not gonna be enough if i wanna veg them for 1,5-2 months. How big should the pots be, considering this strain grows pretty big? would 15 litres buckets suffice?