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Eastern Pennsylvania

If you have the capability of holding the temperature steady anywhere you want to we’re growing your giant tomato, what temperature would you choose? You could even choose a different temperature for daytime and nighttime, or the same temperature 24 hours a day. What do you think is the best temperature. Thanks

1/16/2021 4:39:32 PM

Eastern Pennsylvania

My question really is related to air temperature but let’s throw soil temperature in there too just for conversation if anyone wants to weigh in

1/16/2021 4:42:16 PM

Wixom MI.

I like 80 to 85 daytime and 65 to 70 at night and about 15 to 16 hours of light.

1/16/2021 5:29:53 PM

Central NY

I mean, if we can just choose like that...I’ll take 82 day and 55-60 night...soil I dunno but I hope someone tries cables for late season soil warmth. 63 days til spring.

1/16/2021 6:05:15 PM

Eastern Shore of VA

I’ll take 80/60.

1/16/2021 8:31:32 PM

Grittyville, WA

I wonder if the humidity and % shading vs direct sun would play a role also. I think Id go for 75/60 if the humidity was low or in direct sun. In higher humidity or under indirect light maybe up to 85/65? I think I'd err on the side of zero heat stress. It might help to get some dew at night? To really push the turgor pressure up and give the roots a break? Idk.

1/17/2021 2:13:46 AM

This article might give you some ideas.


https://www.greenhousecanada.com/the-latest-on-lighting-32145/

1/17/2021 11:08:44 AM

Grittyville, WA

“A temperature of 13.5 to 14 C is suitable as a minimum for tomatoes, 13 C for cucumbers and 15.5 to 16 C for peppers, to maintain quality. There are also small differences among varieties.”

So thats 56-57 in farenheit. The article states that cooling the leaves/ growth tips immediately at the end of the day will focus more of the energy available for growth (photosynthates) into the fruit. A sort of temperature-based pruning method I guess.

1/17/2021 3:41:49 PM

Eastern Pennsylvania

Interesting article. So do you think that there is a benefit to lowering the air temperature at night? I’m looking for the optimum temperature for my indoor grow.

1/18/2021 9:24:59 AM

Grittyville, WA

There are so many variables. There must be a temperature where ripening is triggered. I dont know if thats a daytime temperature trigger or a night time temperature trigger. It seems like they can grow without ripening at all if they are under 70/50 they can still grow but they pretty much never ripen at temps below 70/50. I got a five pounder when temps were dipping down to 30's in October it still kept growing. The low temps didnt completely halt the growth. (But maybe this depended on other variables that kept the plant from going into shock.)

1/18/2021 9:25:35 PM