I have several heritage varieties of tomatoes growing here in Calgary Alberta , and in a green house that I usually keep the ends open on.
I transplanted them at 6 -8 inches tall ,and now they climbed 4 feet or so , and have had yellow flowers for over a month now , but very few tomatoes.
I just was inspecting the dying flowers , and the stem is breaking off about a half inch up from the flowers.
There seems to be a small bump at the point where the break later occurs, it acts like a knee, and bends downward and all on it's own breaks off.
I experimented with some that were ready to break, and the stem has a whitish color inside it ,which appears to be very much alive .
I have Black Krim, Chocolate strpe and Navajo purple , the Black krim is affected the least but still doing the same thing , just on less tomatos.
There is no sign of bugs knawing away , just a clean break like cut with a knife.
We have a hot summer this year and I used quite a bit of water in the green house , also in there my beets are growing like crazy ,and my green onions too, Even my cucumbers are doing well, just the tomatoes are a problem. .
Any help will be appreciated , we will be getting snow here in 2 months or less.
Thanks for the edit, I didn't know they broke off if not pollinated. I have shaken them and used q-tips and later a small paint brush , that maybe why a few are growing. I'm going back out with my paintbrush.
I'm running out of growing season, probably snowing in 2 months , but at least I use any green ones for salsa .
Thanks for the info.