stable watering pattern, some calcium etc. Once the mato has it it has it. This is most problematic when the fruit is first setting.

There is no "cure" except patience, cooperation from the weather, and time. As the plant adjusts, and the weather stabilizes it goes away all on its own.

But there are helpful preventative measures outlined in the FAQ on BER here. I linked it for you below.

There are lots of discussions here too on BER a search will pull up for you if interested. Good luck with your tomatoes.

Dave

Here is a link that might be useful: BER FAQ