Per the enclosed foto, I found several tomatoes with the problem as shown....
Per the enclosed foto, I found several tomatoes with the problem as shown. They are growing in large pots, as are several other tomato plants, none having the same problem as of today, 7 July. Thanks for any assistance.
This is blossom end rot which is a calcium deficiency. It is fairly common on tomatoes when the calcium cannot get up to the fruit. This is why we recommend that you stir a handful of lime (which is calcium) into the planting hole of each tomato. It can also be brought on by cold temperatures (usually in early spring) or by underwatering so that there is not enough water to get the calcium up to the leaves. If you have been watering sufficiently, then scratch some lime into the surface of the pot and water it in to try to get some calcium down to the roots so that it can be absorbed. Another option is to purchase a calcium spray, such as stop rot, and spray it on your tomatoes following the label directions.
Many thanks, will do.