Q: My husband, who is a retired Delta grain farmer, is trying his hand at growing tomatoes. We have tons of the tiny ones, which are very good. Our large tomatoes, are prolific enough, but most of them have a lot of white meat in them when they are fully ripe. Please tell us what is causing this.
A: My initial answer was “Probably just high heat. Cut out the white part and enjoy them.”
Now though, I think there may be a different explanation: low potassium levels in the leaves caused by cloudy days and a big fruit load.
Read this factsheet for more information: Tomato Ripening Problems
The last part of my advice still stands: Cut out the white part and enjoy them.