I’ve never had this problem before. These were planted on Labor Day weekend and as we never had a freeze this year, they just kept producing and blooming. Now I’m pulling these plants up with green tomatoes on them (again a first) to get ready this weekend to plant new plants. And like @B1rdhunter, I plant 36 plants and we put them up to be used thru out the year. So, I don’t know if these will ripen off the vine?