These are most frequently found in local markets and farmers' markets or as higher priced greenhouse grown tomatoes. Blossom End Rot in Tomatoes . For best quality neither radial nor concentric cracks should be present. Although some tomato cultivars, when grown under certain conditions, have a greater resistance to radial cracking, it can occur in all cultivars, particularly when a very dry period is followed by heavy rains or irrigation. Erratic soil moisture is the primary cause of cracking.
Concentric cracks occur before fruit are mature, apparently due to erratic soil moisture.
There is less cultivar resistance to concentric cracking. The fruit color should be uniform with no blotches or scarring. Retail customers want well-colored fruit. Unless refrigerated, tomatoes continue to ripen after harvest. Soft, over-ripe fruit should not be sold or purchased unless the tomatoes are going to be preserved or used immediately after purchase.