Ok heres whats up. Plants need about 1 gallon of soil per 1 foot of growth at least. So if you plan to groww take future size into consideration. If it has 9 months to go them 2 feet is way too close. I'd say a foot per foot of plant at least. It wont really kill them to be closer but the root system is very important for good bud so take care of it. Room to spread and unleash its full potental is good to have.