BLOSSOM END ROT
Your tomatoes have blossom end rot. It’s a disorder of fruiting vegetables. Blossom end rot is caused by a lack of calcium and/or inconsistent watering. The good news is this disease does not spread from plant to plant in the field, nor from fruit to fruit in transit. Also, prevention and/or treatment is not difficult.
Blossom end rot also affects: peppers, melons, and eggplant.
Since blossom end rot is an environmental problem (not fungal), fungicides will not work as a control measure. We recommend the following:
1. Maintain even moisture with regular watering, and mulching.
2. Applying Fertilome Yield Booster or Cal/Mag to supplement the much needed calcium will help eliminate the problem as well.
Now that’s ‘advice you can grow with’!