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when is it too hot?

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when is it too hot?

Post  Frenchbean on 7/5/2013, 3:10 pm

Hi Everyone. Over here in England were having a bit of a heatwave hooray (makes a change!)       My question is when is it too hot for tomatoes-when do they need a bit of shade.

It is 30 degrees in my garden and the tomatoes look a bit wilted. I only have one truss of the smallest tomatoes I have ever seen. More flowers are on the plant.

What should I do? thinking I am thinking if I shade my plants maybe the flowers won't get pollinated and my one truss of fruit won't ripen

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Re: when is it too hot?

Post  cheyannarach on 7/5/2013, 3:37 pm

When it is 30 degrees in my garden my plants freeze to death Very Happy When it get's to be over 90 degrees you could give them a little shade and try to water in the early mornings or evenings when it's a little cooler so the water doesn't evaporate. I need to look at a conversion chart for the correct temperature for your side of the world!
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Re: when is it too hot?

Post  cheyannarach on 7/5/2013, 3:40 pm

Okay, just looked it up does I think 30 degrees there should be about 86 degrees here so a little shade could help and it shouldn't keep your tomatoes from getting pollinated! Good luck and have fun in the heat wave sunny 
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Re: when is it too hot?

Post  plantoid on 7/5/2013, 4:06 pm

FB ,
Even at 30 oC our British grown outdoor toms won't need shade as the climb to those temps is rather slow unless your glass housing them with water sleeves etc .
Keep them well watered & feed if required as soon as  the sun goes down and give them a drink first thing in the morning  before the sun starts to show any sign of decent warmth .

 The biggest prob your likely to get  with your outside toms is higher than usual humidity and still air , which is a recipe for getting blight developing.  I suggest you locate some anti blight stuff and use it according to the label.

Maybe use of a small electric fan to move the air around the plants .... so long as you keep it dry & it is safe wrt Kids & pets  .


Last edited by plantoid on 7/5/2013, 4:10 pm; edited 2 times in total
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Re: when is it too hot?

Post  Marc Iverson on 7/5/2013, 4:08 pm

I think I read that tomatoes won't set fruit when it's colder than 55 or hotter than 95 degrees.  That might figure into your decisions once it starts to get really really hot.
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When is it to hot?

Post  Frenchbean on 7/5/2013, 4:28 pm

Thanks everyone. Yes I have just watered and feed them with tomato food; Very Happy   now the sun has gone down. I think I might copy an Idea I saw  where study  . people filled up drinking bottles and inverted them into the soil. Maybe that would help also. slow drips of water?

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Re: when is it too hot?

Post  brainchasm on 7/6/2013, 3:28 am

@Marc Iverson wrote:I think I read that tomatoes won't set fruit when it's colder than 55 or hotter than 95 degrees.  That might figure into your decisions once it starts to get really really hot.
We haven't been below 95 for over two weeks now (sometimes even at night it won't cool down!).

My tomatoes looked like they were just doing the growing/survival thing, but just tonight, I found two Black Krim babies that apparently had set in all that heat! Also, the one Black Krim actual tomato that stopped growing and such...well it isn't much if any bigger, but he's a beautiful dusty brown/orange color now!

My Cherokee Purple fruits that did set a long time ago are still growing, but still white, and now they're cracking a bit. Such is life with heirloom toms, I guess.

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Re: when is it too hot?

Post  sanderson on 7/6/2013, 3:40 pm

Sweet, cool breeze last evening!  What a relief.  I bet the plants are going to enjoy this weekend with temps below 100.

Yeah, I know it's the spring emoticon, but it's what I feel.
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Re: when is it too hot?

Post  Marc Iverson on 7/6/2013, 7:27 pm

Brainchasm, glad you're having some luck!

We've had a number of days in the mid 90's to over 100.  All but two of my tomato plants loved it; two are younger ones and more recent transplants, and they shriveled a bit.  But the rest of them grew greenery almost explosively.  Not so much with the setting fruit though.

And I counted 20 blossoms that fell off my cucumber plant.
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