Jet Star problems

[piegirl]

Jet Stars have been a staple in my gardens for at least twenty years if not longer. They are my main production crop. This year the plants are a mixed-up mess. First I thought several plants were mixed up by the grower or a customer switched out plants - I called and the grower said they could be either Heartland or Celebrity bush b/c they are definitely bush plants. Now at least 3 or 4 others are definitely not JS. And because of their taste I doubt they are any other well-known variety. Several appear to have JS growth but fewer fruit, one is a really great tomato - thick fleshed, great taste, large but now the foliage is turning completely yellow - almost overnight. Several others are quite low growing with fair production, nothing ripe yet. These were the last to be planted out so they could just be laging behind. Anyone else seeing problems this year? I see Carolyn mentioned something in the why de-hybridize posting. The grower is a local greenhouse and always has top quality plants, although I don't think they are tomato 'junkies'. They don't grow a wide variety of tomatoes and only do a few heirlooms since so many of the really small farmer's market growers do heirlooms. piegirl