Tomatoes in EarthBoxes: Fixing Excessive Growth and Poor Fruiting

If your EarthBox tomatoes grew seven feet tall in three weeks but produced only five fruits total, over-fertilization is the culprit. When tomatoes receive excessive nitrogen, they channel all energy into vine growth at the expense of fruit production.

Stop fertilizing immediately. For future reference, fertilize tomatoes just three times: at planting, when the plant doubles in size, and when the first fruits appear. If you have a heavy crop, a fourth application in August when growth slows can help. EarthBoxes concentrate nutrients, so use a light hand with fertilizer.