A. Cracking is a physiological disorder caused by soil moisture fluctuations. When the tomato reaches the mature green stage, reduce or cut off the water supply to the plant as the tomato begins to ripen. At this time, the skin around the outer surface of the tomato becomes thicker and more rigid to protect the tomato during and after harvest. If the water supply is restored after ripening begins, the plant resumes translocation of nutrients and moisture into the fruit. This causes the fruit to enlarge, and the skin splits around the fruit resulting in cracking. The best control for cracking is a constant and regular water supply. Apply a layer of organic mulch to the base of the plant. This serves as a buffer and prevents soil moisture fluctuation. Some varieties are resistant to cracking, and we try to recommend these varieties.