Tomatoes

Question

Why are some of my tomatoes turning black and some aren’t? Cherry tomatoes ok. It’s just big tomatoes. I have them in greenhouse.

Answer 1

It sounds like you may have blossom end rot. Larger tomatoes are more susceptible due to the nature of the disease. Here is more information:
https://www.gardeningknowhow.com/edible/vegetables/tomato/tomato-blossom-rot.htm