Author Topic: High potash or low biuret urea ahead of flowering?  (Read 511 times)

Yorgos

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High potash or low biuret urea ahead of flowering?
« on: December 12, 2024, 05:46:44 PM »
For a while there it was recommended to spray citrus with a low biuret urea about 6-8 weeks ahead of flowering.  But I just read that the nitrogen actually inhibits flowering and a high potash fertilizer is recommended. Has something changed?

I have been away for a while, as all my trees succumbed to winter storms Urri and Elliot and I was slow to replant..



 
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Millet

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Re: High potash or low biuret urea ahead of flowering?
« Reply #1 on: December 13, 2024, 01:04:03 PM »
 I have used low biuret urea to greatly increase spring flowering, it works great.  According to the Citrus Production Manual, published by the University of California either Low Biuret Urea (46-0-0) or Potassium Phosphite (0-28-26) can be used.  The spray to increase bloom should be sprayed between December 15 and to February 15.   For warm greenhouse production the earlier spray of December 15 provides a much better bloom.   I  can find no where in the University's production manual that it states  that nitrogen inhibits flowering. 
« Last Edit: December 13, 2024, 01:09:38 PM by Millet »

Seanny

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Re: High potash or low biuret urea ahead of flowering?
« Reply #2 on: December 14, 2024, 11:48:47 AM »
It’s odd to recommend spraying N while all my citrus trees are still holding fruits.

Millet

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Re: High potash or low biuret urea ahead of flowering?
« Reply #3 on: December 14, 2024, 12:59:59 PM »
Seanny, your in California, and the the above recommendation from UCR would directly apply to you.

Seanny

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Re: High potash or low biuret urea ahead of flowering?
« Reply #4 on: December 14, 2024, 06:35:55 PM »
I did some readings this morning.
I should spray my trees.

Yorgos

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Re: High potash or low biuret urea ahead of flowering?
« Reply #5 on: December 19, 2024, 10:22:01 AM »
I have used low biuret urea to greatly increase spring flowering, it works great.  According to the Citrus Production Manual, published by the University of California either Low Biuret Urea (46-0-0) or Potassium Phosphite (0-28-26) can be used.  The spray to increase bloom should be sprayed between December 15 and to February 15.   For warm greenhouse production the earlier spray of December 15 provides a much better bloom.   I  can find no where in the University's production manual that it states  that nitrogen inhibits flowering.
Thanks Millet.  But I am a bit confused by the recommended sprays you mentioned.  Either the high N sans any other macro nutrient OR high P-K sans N?  Its a bit confusing as they are direct opposites in terms of the N-P-K content.  Why not just combine them for maximum effect, as one might conclude from the Citrus Production Manual (per the part I italicized in quoting you)?
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Millet

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Re: High potash or low biuret urea ahead of flowering?
« Reply #6 on: December 19, 2024, 12:09:21 PM »
I just quote what the University of California Riverside recommends for a better bloom.  As happens in life there frequently is more than one way to accoumplish a goal. 

Seanny

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« Last Edit: December 19, 2024, 11:27:05 PM by Seanny »

Yorgos

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Re: High potash or low biuret urea ahead of flowering?
« Reply #8 on: December 20, 2024, 10:12:34 AM »
Thanks!  You all are the best! 
Near NRG Stadium, Houston Texas. USDA zone 9a

 

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