Another mystery to solve. Last year I saved some seed from a Sungold cherry tomato. These are an F1 hybrid so I was expecting something slightly different, but... they will not ripen! They have sat in this green/gold state for about 5 weeks now. All other tomatoes around them in the greenhouse are ripening fine. I have even picked about a dozen and sat them in the kitchen among all the other ripening tomatoes for about 4 weeks .... they do not ripen!! They still taste green, why are they not ripening.. anyone?