Living on the 2nd floor of a house with just a deck for growing stuff has it's challenges for me, an old farm boy (not reaaly but always had a yard with real dirt). Watering is the biggest problem with containers, they just dry out too quickly. Bigger pots and twice a day watering has been my answer, it's not good for the plants to wilt too often although when mine do I just tell my wife it makes them stronger, lol.