Vegetables and Fruit forum→Yellowing leaves on tomato plant

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Name: Rose
Colorado (Zone 5b)
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romalu
Jun 13, 2020 5:04 PM CST
So at first blush, my yellow pear tomato appears to be thriving -- It's at least quadrupled in size in the 6 weeks I've had it, I've got loads of flowers and a bunch of little tomatoes already forming. It's planted in some good organic potting mix, it's been given two doses of 'Mater Magic' plant food (one at planting, one 30 days later, as directed). It's in full sun, I water daily or every other day depending on the weather.

So why are a few of my leaves suddenly turning yellow and brown? They're all down at or near the bottom of the plant. I hoping it's just an age thing, but if it's not I want to stop it before it gets worse.
Thumb of 2020-06-13/romalu/f0daba
Thumb of 2020-06-13/romalu/5a6c60

Name: SoCal
Orange County (Zone 10a)
Lazy Gardener or Melonator
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SoCalGardenNut
Jun 14, 2020 10:55 AM CST
That's normal I think, I pinch them off, older leaves near the bottom of the plant.
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Foothills of the Italian Alps
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ElPolloDiablo
Jun 14, 2020 2:01 PM CST
That's Early blight. You can control it by cutting off the affected leaves; just remember to wash your pruning implements in scalding hot water afterwards to avoid spreading it around.
Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher animals, directly follows. There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.
-Charles Darwin-
Name: Lynda Horn
Arkansas (Zone 7b)
Eat more tomatoes!
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gardenfish
Jun 14, 2020 2:03 PM CST
Could be early blight, could just be old leaves, could be something else! Yes, remove them, but you might want to sprayb with copper. It couldn't hurt, and if it's a disease other than early blight, could stop a different kind of disease.
Yesterday is gone. Tomorrow has not yet come. We have only today. Let us begin.
Mother Teresa
MSP (Zone 4a)
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repentantslide
Jun 14, 2020 2:34 PM CST
Just happens with tomatoes. Unless the entire plant starts dying I wouldn't worry. That's the price we pay for having huge plants that can produce dozens of pounds of tomatoes each, they don't have strong disease resistance, even on the "disease resistant" varieties. They just weren't bred for it, at least not as the main thought.
[Last edited by repentantslide - Jun 14, 2020 2:34 PM (+)]
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Name: SoCal
Orange County (Zone 10a)
Lazy Gardener or Melonator
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SoCalGardenNut
Jun 14, 2020 7:57 PM CST
This evening I pinched off all the lower yellow leaves on all tomatoes plants, they don't look good anyway, so why not. I resist the urge to spray everything if I can help it.
2022 wishlist: Pastelorama, Pastelegance, and Blonde Vision.
Name: Lynda Horn
Arkansas (Zone 7b)
Eat more tomatoes!
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gardenfish
Jun 15, 2020 12:59 AM CST
I spray copper as a preventative to fungal diseases that are endemic here. If I didn't, I wouldn't have any tomatoes. But that's what I have to do here. I would not say other growers in other climates and growing conditions need to do this.
Yesterday is gone. Tomorrow has not yet come. We have only today. Let us begin.
Mother Teresa
Foothills of the Italian Alps
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ElPolloDiablo
Jun 15, 2020 1:46 AM CST
gardenfish said:I spray copper as a preventative to fungal diseases that are endemic here. If I didn't, I wouldn't have any tomatoes. But that's what I have to do here. I would not say other growers in other climates and growing conditions need to do this.


Seconded that: you cannot grow tomatoes, eggplants, vines etc without Bordeaux mixture or another copper-based fungicide, just like you cannot have a good yield on tiny plots without plenty of fertilizer. Chemistry is not an opinion.
Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher animals, directly follows. There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.
-Charles Darwin-
Name: SoCal
Orange County (Zone 10a)
Lazy Gardener or Melonator
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SoCalGardenNut
Jun 15, 2020 8:11 AM CST
Here is a picture of my Celibrity tomato, you can see I've already pinched off all the lower yellow leaves. And there are more that I should pinch today.

Thumb of 2020-06-15/SoCalGardenNut/f9e13c

2022 wishlist: Pastelorama, Pastelegance, and Blonde Vision.
Name: Rose
Colorado (Zone 5b)
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romalu
Jun 15, 2020 2:49 PM CST
Thanks. I pinched the yellow and wilted leaves. There's no spotting or other discoloration, so it really doesn't look like blight or disease; I'm thinking I've just been overwatering!
Name: Dr. Demento Jr.
Minnesota (Zone 3b)
RpR
Jun 17, 2020 9:01 AM CST
There are a number of organic fungicides out there now which you can put on as often as needed, or you wish, without hurting the plants.
They are not fool proof , but work well.
Serenade is best known but there are others if you put -- organic fungicides -- in a search engine.
I use Serenade, Sonata, Oxidate and Actinovate.
Some such as Oxidate though you have to be a bit more careful, i.e. read the instructions.

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