Anybody got signs of peaches waking up?

I had to wait for the rain to stop after 5 days of it, in order to spray for peach leaf curl. Last year I had green tip on 20 Feb and today it looked pretty close to starting.

I sprayed twice already for leaf curl on Thanskgiving and after New Years, and hopefully this spray wasn’t too late

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Thanks for reminder, my peaches and plums are swelling so I will make my PLC spray with Chlorothalonil today as it’s forecast to rain the whole week, but today no rain! I did a fall application of liquid copper so this is my final for PLC
Dennis
Kent, Wa

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I didn’t check my nectarine, but Nadia and Candy Heart were starting to swell and show white.

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You inspired me to go look, and mine are definitely waking up too, including the experimental fall graft of Indian Free from @Noddykitty that I wasn’t sure if it would take since it didn’t grow at all before going dormant… Looks like both scions are good to go, though:

And here’s the main Oregon Curlfree that is grafted onto, similar stage:


I won’t be spraying these, so if PLC is a deal-breaker over time, I’ll be chopping them down eventually.

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Ours seem to still be completely dormant, which is good. Mild winter so far, but only a few days above 60 and plenty of overnight lows below freezing. The rest of the month will be mild for February. Overnight lows in the 20’s, highs in the 40s but isn’t supposed to get above 50. Should keep things at a stand still for now.

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I cut all my peach trees down back in the fall. But plums tree buds are swelling. They’ll start blooming within the next couple of weeks. Late freezes will cause 90 - 100% loss. Plums and cherries will be cut down next. Stone fruits just aren’t doable in my location.

Mid TN z7.

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I have an almond tree that looks similar. Is it too late to prune at this stage? Or use Horticultural oil?

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It is worse in cincinnati ohio

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You bet!

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We’ve had a pretty mild winter here so far, other than one bad week, but I was curious to see how it compared to last winter (which felt unusually cold to me at least), so I ran a comparison of Nov. 1 to yesterday’s date for this winter vs last winter for my yard’s temperature sensor. The biggest differences are days above 50°F, and just generally days in the 45° to 60° range, but there also have been half as many days with a freezing low. Yet the Utah chilling units are pretty similar both years.

Does anyone know what exactly triggers peaches to come out of dormancy?

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They get their chilling needs and then a little heat above freezing. Warm weather this time of year can be especially bad in high chill climates. You get your chilling by Jan 1 or before. After that it’s all about warm temperatures. Peach seeds germinate in the fridge at 35-40F. So flower buds many well do the same.

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Yes all of my trees are waking up. Spraying today!

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Can you spray copper and horticultural oil in one tank? Or should the two be separate?

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The oil should act at a sticker, no? I used to do it.

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Together is ok

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At dormant stage, oil can be spray with copper.

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In the dormant stage, it is recommended to mix copper with horticultural oil or some form of surfactant.

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@swincher
Can you tell me what website you used for the Utah Chill Unit clacs?

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Peaches, summer Delight Aprium and Hollywood plum are swelling flower buds.


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I didn’t use a website, well I used my own website. This was based on temperatures from my own outdoor sensor in my yard, which I have stored in an SQL database. I used a PHP function like this on the raw data, and did a sum of the result of this function for all the hours in the time series:

function utahChill($number) {
    $number = 1.8*$number+32; // delete this line if data is already in degrees F
    if($number < 34) return 0;
    elseif($number <= 36) return 0.5;
    elseif($number <= 48) return 1;
    elseif($number <= 54) return 0.5;
    elseif($number <= 60) return 0;
    elseif($number <= 65) return -0.5;
    else return -1;
}

The calculation was based on the table on this website, though:

For anyone who wants to do something similar in PHP, I can share more code, but I figure this isn’t really the forum for that kind of thing :laughing:.

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