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Author Topic: Its Now Time To Foliar Feed For Best Crop Of Fruit  (Read 19037 times)

jtnguyen333

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #125 on: January 07, 2021, 11:20:47 PM »
Vlad, that is why the tree is sprayed 2 months BEFORE expected bloom date (before the new flush of leaves)

Millet..what is the bloom date for southern california?

poncirsguy

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #126 on: January 08, 2021, 12:02:56 AM »
Too late  all my trees have flushed out but 1

Vlad

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #127 on: January 08, 2021, 09:04:16 AM »
Millet, thanks for the clarification.

Millet

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #128 on: January 10, 2021, 03:47:21 PM »
For the first spray of low biuret urea (called the winter spray) the most effective application time in California is from December 15 to February 15 in most years, NOTE: this window was extrapolated from research conducted in southern California. (Citrus Production Manual)

Seanny

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #129 on: January 11, 2021, 01:09:06 AM »
My trees all still have fruits.
Should I wait until post harvest?

Millet

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #130 on: January 11, 2021, 11:29:57 AM »
Seanny, you can still spray even though your tree still has some hanging fruit.

Daintree

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #131 on: January 11, 2021, 11:33:25 AM »
Millet, I sprayed mine last month, and two are flowering now, but they have NO leaves, and haven't had for almost a year.  They are in my greenhouse.  What the heck am I doing wrong?  I have been giving them Miracle Gro, and also a complete food that has all 14 nutrients.

Carolyn

Millet

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #132 on: January 11, 2021, 11:51:52 AM »
Some members might not know the reasons to apply the first spray , called the winter spray, of low biuret urea.  This first spray is designed to increase flower number and yield of commercially valuable sized fruit WITHOUT reducing fruit size  Later applications are better than those that are too early.  This is because once this opportunity to increase flower number has passed, late applications of low biuret urea will still increase the retention of abscising reproductive organs. Citrus Production Manual

Millet

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #133 on: January 11, 2021, 11:56:13 AM »
Daintree are you saying that your tree has not had any leaves for a year?

poncirsguy

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #134 on: January 11, 2021, 02:52:11 PM »
will ammonia sulfate work.  I have access to ammonia sulfate 21-0-0

Daintree

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #135 on: January 11, 2021, 04:46:51 PM »
Daintree are you saying that your tree has not had any leaves for a year?
Yep. I keep thinking it will flush, but it just puts out more flower buds! It is 6 years old and did really well up until last winter.  All the leaves dropped, and no amount of light or fertilizer would help. I will go get a pic right now. Soil drains well.

Daintree

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #136 on: January 11, 2021, 04:55:56 PM »
Checked the tag, I have had it since 2017. January of 2020 all the leaves dropped. The pic shows tiny flushes of leaves, but they have looked like that for months. The tiny leaves never get anyy bigger. 1/4 mm long.

I am SO ready to give up on citrus all together, unless I can get this figured out.

This is it. I call her "Baldy" :)


You can see a tiny cluster of leaves. It pushed these out this summer and this is all the bigger they got.


Millet

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #137 on: January 16, 2021, 02:45:37 PM »
The reason Urea is used to supply nitrogen via foliar spays, is because the time for 50% leaf absorption of the chemical is only 1/2 - 2 hours.  Many chemicals take days or weeks.  The best time to apply foliar fertilizers is early morning, when the plant's stomates are open.
If temperatures are projected to reach approximately 85-F or higher during the day, applications should be made just after daybreak or after the temperature drops in the evening and the relative humidity increases.  Winter applications should be made at midday, when temperatures are suitable warm.  Avoid spraying to runoff.  Excessive liquid per tree causes pooling of the fertilizer at the tip of the leaf, which can result in tip burn.  Nutrient uptake is best when the application solution is at a pH from 5.5 to 6.6 .  Last note: For most cation nutrients (magnesium, potassium, zinc manganese and iron), application as a sulfate salt is equally effective as chelated products and less expensive.

jtnguyen333

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #138 on: January 18, 2021, 12:37:50 AM »
The reason Urea is used to supply nitrogen via foliar spays, is because the time for 50% leaf absorption of the chemical is only 1/2 - 2 hours.  Many chemicals take days or weeks.  The best time to apply foliar fertilizers is early morning, when the plant's stomates are open.
If temperatures are projected to reach approximately 85-F or higher during the day, applications should be made just after daybreak or after the temperature drops in the evening and the relative humidity increases.  Winter applications should be made at midday, when temperatures are suitable warm.  Avoid spraying to runoff.  Excessive liquid per tree causes pooling of the fertilizer at the tip of the leaf, which can result in tip burn.  Nutrient uptake is best when the application solution is at a pH from 5.5 to 6.6 .  Last note: For most cation nutrients (magnesium, potassium, zinc manganese and iron), application as a sulfate salt is equally effective as chelated products and less expensive.

Millet..what product is sulfate salt for those cation nutrients?

Millet

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Re: Its Now Time To Foliar Feed For Best Crop Of Fruit
« Reply #139 on: January 18, 2021, 11:15:18 AM »
Iron Sulfate, Copper Sulfate, Zinc sulfate & Manganese sulfate.

 

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