Taste results of 2 "new" tomato varieties.......

[headfullofbees]

I think Chuck Actually means 55f (12.8C).

 

[Chuck]

I think Chuck Actually means 55f (12.8C).

Nope, 65F. You can transplant at 55 but the growth is slow to slower. And you can just about forget fruit set at 55. 65 -85 is optimum

 

[alp]

Too many bees in your head, @headfullofbees ! Now, I am only joking.

I am pretty sure for tomatoes to grow well and ripen, one needs to be just around 25c roughly speaking. Optimum for 28c or thereabout. Today's in London was OK for fruit. Got to go to bed early to be an early riser to water the tomatoes. Thank you all and good night or good day to all!

 

[headfullofbees]

65f ~ 18C
I've not had ONE night like that this year, and many years never get two nights like it successively.
According to this paper, cited 9 times, temperatures require to be between 12.8C (55f) and 26.7C (79f) for successful fruit set, with 18.3C (64f) being the optimum, rather than the minimum.

http://www.nrcresearchpress.com/doi/pdf/10.4141/cjps72-080

 

[alp]

I was thinking of fruits to ripe.

 

[TomatoTango]

I’ve got hundreds of tomatoes and our nighttime temps have been 45-50 so far. Mine set during the day when it’s 65-100.

 

[Chuck]

65f ~ 18C
I've not had ONE night like that this year, and many years never get two nights like it successively.
According to this paper, cited 9 times, temperatures require to be between 12.8C (55f) and 26.7C (79f) for successful fruit set, with 18.3C (64f) being the optimum, rather than the minimum.

http://www.nrcresearchpress.com/doi/pdf/10.4141/cjps72-080

Basically I agree with this study. However I don't believe this dated (1972) study takes into account important aspects of growing a productive tomato plant. For instance, the temps were constant 24 hours a day. Only 2 trusses were observed. No mention of the growth habit or the relative rate of growth at any of the 3 temperatures. What this study does show is that 18.3C (65F) is the optimum temperature for fruit set and at a lower temps and higher temps fruit set drops significantly.

 

[Chuck]

I’ve got hundreds of tomatoes and our nighttime temps have been 45-50 so far. Mine set during the day when it’s 65-100.

You must have a secret weapon. This goes against all research. With nighttime temps that low research indicates blossom drop. Here is just one of many links.
http://edis.ifas.ufl.edu/hs1195

 

[TomatoTango]

You must have a secret weapon. This goes against all research. With nighttime temps that low research indicates blossom drop. Here is just one of many links.
http://edis.ifas.ufl.edu/hs1195

Clearly that research is flawed if I have hundreds of tomatoes in my garden and thousands of flowers going right now. Also what you posted doesn’t really contradict what I said. I said they pollinate during daytime temps and that articles says they primarily pollinate between 10am and 4pm.

Just because my nighttime temps dip in the 45-50 range doesn’t necessarily force blossom drop. It probably could, especially if they aren’t given supplements or grow in poor soil. Mine get a foliar feed weekly of about 5-6 ingredients and my soil is loaded with natural emendments. I’ve liquid fed mine once because it won’t stop raining but they’re 5-6’ tall and doing good. They’re getting bombed with a bloom formula when I can finally water them.