Q: I have a problem with my three tomatoes growing in one of those plastic Earthboxes. The plants grew to seven feet tall in three weeks but have only had five tomatoes between them. What do I do to get more fruit?
A: Stop fertilizing. A tomato will put all of its energy into vine growth and none into fruit production when it is overfed. I recommend fertilizing tomatoes once at planting, once when it has doubled in size and once again when a few fruit appear on the plant. If you have a big crop, fertilize again when you notice less vigorous growth in August.