I agree with Dutch...go with 5 gallon pots. 25-30% peralit. Also put about 3 inches of pebble gravel at the bottom of the pot to avoid root saturation. Transplanting into pots has the mobile advantage of "movement" if need be!
You can also force them into flowering by simply moving them into your garage or some other totally dark enclosure.

Grow well...stay mobile! :thumbsup: