what causes dry rot on the blossom end of tomatoes

Question

What causes dry rot on the blossom end of tomatoes?

Answer 1

Yes, blossom end rot is often caused ba a lack of calicium in addition to watering issues. This article will help you with that:
https://www.gardeningknowhow.com/edible/vegetables/tomato/tomato-blossom-rot.htm

Answer 2

I find uneven watering & soild insuffiecient in calcium seem to be the cause of blossom end rot in tomatoes as well as squash. Remove affects fruit, add calcium rich compost [egg shells] & do not over water.