Rotten tomatoes?

Hi Marian,

You have described a tomato that has blossom end rot. It is a common physiological disorder caused by a calcium deficiency. It could be that there is not enough calcium in the soil, or the pH is off and the calcium is not available to the fruit. The recommended soil pH for growing tomatoes is between 6.5-6.7. Blossom end rot is more prevalent during periods of excessive heat. Uneven moisture levels and too much nitrogen can also make tomatoes more prone to this disorder. For now, avoid adding fertilizer, keep soil consistently moist and discard all infected fruit. There is still plenty of growing season left for your plants to produce a healthy crop.