Let me say up front...I am no gardener, my DH says I can't grow mold in the frig (although my comeback is usually "why would I want to?"). Anyway, last year I did the Topsy Turvy tomatoe tree (the one with 3 holes on the sides of the bag, not the smaller one with 1 hole in the bottom) thing. I was over run with tomatoes. I think the important thing to remember is to keep the plants well-watered. Remember, they don't get access to any ground water so if the soil in the bag isn't kept moist the roots dry out. I watered mine twice a day unless we had rain that day.