Oh, it looks a lot like a wilt to me too. How much watering are you doing, what is the air flow/ventilation and temps like in the greenhouse? What variety of tomatoes are they?

I water about once a week. Temps in the greenhouse have been 70's-80-s during the day and 50's at night. I have the windows door and windows open all day, and a fan running all of the time. The are all supposed to be greenhouse tomatoes meaning that they have some disease resistance. Thanks

Many varieties are popular for greenhouse growing. Some of them can have some different resistances to different things. Also resistance does not mean immune. If the conditions are right, resistant varieties can indeed fall too. So, again.. what variety of tomatoes are they?

If you are watering once a week, how dry are the containers getting between waterings? What size are they- hard to tell from the pics. And are they new to you this year, or are you used to using them?

Plum regal, Sakura, Juliet, cosmonaut, pozano, iron Lady, Lucy, granadero, Rose de Berne,sun gold, Bizini. I can't reach to the bottom of the pot, the bags are not wet. They're 5 gallon and 10 gallon bags. When I water it feels just slightly damp as far as I can reach in.

Might be the Rose de Berne or Bizini that were the weakest links, they have the lowest resistances for wilt. You might be stressing them with under watering too. Try twice a week instead of once, keep the moisture level steady and actually moist instead of slightly damp. Bags can be a bit more prone to drying than other containers, even the bigger ones.

You might also want to consider pulling the worst pots out of the greenhouse entirely right now. You might still get some crop out of the healthiest of the plants, but they might fail too. After growing season, you are going to want to dispose of all plants and material- no composting. Sterilize/sanitize your pots. Do the same to your soil or dump the soil. You will also want to clean and sanitize your greenhouse since spores can stick to the insides- and the pallets or other wood surfaces inside.

Is this your first year growing tomatoes? If not, how were your previous years grows- particularly last years?

I have been growing tomatoes for about 50 years.

I grew tomatoes in the greenhouse for about 5 years, and then they started to get diseases, so I did not grow in there for 4 years. I tried again last year but the tomatoes had diseases - nothing like this though. I got a good crop - it was just that the plants did show some signs of disease as the summer wore on. My Juliet did get so wilty that I pulled it out. Perhaps that is the source of this problem?? So I thought that I would try the pots. To avoid diseases. Did not work out for me. I will not try this again. Thanks for your help. We will just see what happens, but things seem to be getting worse by the day.

Yeah, if you have been having problems in the previous years you need to do a full greenhouse cleaning.

And what would that involve?

Completely empty the greenhouse. Do not bring stuff like pallets back inside at all. Stuff that can be sanitized, do so before bringing it back in the house. Wash down the entire interior with Jeyes fluid or other like garden disinfectant. If you have raw wood exposed in the framing, you may need to primer/paint over that to help seal it up. If you have exposed dirt parts of your floor, you might want to skim it and lay down some fresh flooring. You might want to burn a sulfur candle in there or spray with fungal treatments.

Well I'm not sure we can do this. I have these tomatoes and pots, but mostly I have beds in the ground that we use. I may just have to skip tomatoes from now on.

That would be a bummer not to have tomatoes. Why are you growing them inside instead of outside?

It's too cold at night to ripen them here outside.

Oh no. Your overnights stay in the 50's all summer? I couldn't even, lol. I would have to get a pop up green house or something to do a season in. Not this year anymore maybe, but look for one on clearance at the end of this season. I love tomatoes a bit too much to give up.

What's up with your greenhouse that you feel you might not be able to clean it up? The pics are of the tomatoes so kind of hard to tell what's going on in there.

Well the beds are soil in the ground. I would have to dig our all of the soil, and I love tomaotes, but not that much!!!!