what night time temps will shut off tomato blossoming?

[dixiegrrrrl]

5. Ha...I did not think of that until about 5 years ago!

Now, to be fair, I spent half my life trying to garden in the PNW where getting tomatoes to produce is a huge effort.
The cut back technique works real well down here in the South where there is a 8 month growing season.

The trick to cutting them back is to leave 10 inches or so of stem AND some leaf buds/branches still growing.
think of it as just whacking the top 2/3 of the plant down/off.
Keep them watered and when the right temp combo shows up again, give them a shot of fertilizer and they should be good to go.

This works for both determinate and non-determinate varieties, btw.