Tomato is brown on the bottom.
Answer
We consulted with Sally McCabe on our Community Gardens team and here is her advice:
Most probably, the problem is Blossom End Rot. It's caused by a lack of calcium in the end of the growing area (the bottom of the fruit.) Although some soils are lacking in calcium, this is generally not a problem in Pennsylvania. More likely, it’s uneven watering and moisture stress that is keeping the calcium from getting to the bottom of the fruit.
Good luck with your tomato crop!