hole in bottom of tomatoes and dark spots on bottom

Question

see pictures

Thanks for your help

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Answer 1

This is not severe yet, but this is the start of a calcium, and magnesium deficiency. You can correct this with a simple application of dolomitic lime. This will provide both of these elements to the plant, as well as keep the soil pH stable.
https://www.gardeningknowhow.com/edible/vegetables/tomato/tomato-blossom-rot.htm