thats too many. you will get a better yield if you did 6 in 3 or 5 gallons. unless you want to run like 4 plants in 10 gallon pots and then veg for a while to get them nice and bushy with lots of tops before you flower. I know that more plants seems like a better idea but if you put the right amount of plants so they all get gud light you will be happier with the outcome not only of your yield but the bag appeal and the dense nugs