It really depends on how big you want your girls to get bro.. I do mine in small "planter" containers to start them off as babies. Then I go (transplant) to a 3 gln, then a 5gln. But some can get by with a foot tall plant in a 3gln container! I've done it plenty!! Never really had any issues. I recently tried out the 3gln "air pots"!! And they do wonders!!