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Potassium Deficiency

joe_OC

By joe_OC
in DISCUSSING PALM TREES WORLDWIDE

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joe_OC Grand Master

joe_OC

Posted
Posted (edited)

Been using Palm Gain for a few years now.  Seeing orange spotting on several of my palms.  When I researched it, it looks like Potassium deficiency.   Attached is a pic of one of my Spindle palms.  All my Spindles are showing this.  Is my assessment correct? If so, I am surprised since the NPK is 8-2-12.  
 

Thanks in advance!

 

 

J

D0C2A88F-42C1-4AEC-BAD8-B693FFDCAA00.jpeg

Edited by joe_OC

Huntington Beach, CA

USDA Zone 10a/10b

Sunset Zone 24

Brett in Mission Viejo Proficient

Brett in Mission Viejo

Posted
Posted

Looks like fungal brown spotting to me, but I could be wrong. Potassium deficiency spotting is more even and transparent looking in my experience.

Mission Viejo, CA

Limited coastal influence

5-10 days of frost

IPS and PSSC Member

joe_OC Grand Master

joe_OC

Posted
  • Author
Posted
6 minutes ago, Brett in Mission Viejo said:

Looks like fungal brown spotting to me, but I could be wrong. Potassium deficiency spotting is more even and transparent looking in my experience.

Thanks!

Huntington Beach, CA

USDA Zone 10a/10b

Sunset Zone 24

Palm Tree Jim Grand Master

Palm Tree Jim

Posted
Posted
15 minutes ago, Brett in Mission Viejo said:

Looks like fungal brown spotting to me, but I could be wrong. Potassium deficiency spotting is more even and transparent looking in my experience.

What’s your recommendation on treatment?

joe_OC Grand Master

joe_OC

Posted
  • Author
Posted

I've gotten fungal spotting before.  This seems different?  It could be just because it was a long/wet winter that could cause it.  Not much you can do with fungal spotting.

Huntington Beach, CA

USDA Zone 10a/10b

Sunset Zone 24

Brett in Mission Viejo Proficient

Brett in Mission Viejo

Posted
Posted
1 hour ago, Palm Tree Jim said:

What’s your recommendation on treatment?

Apply fungicide preventively or at earliest signs during cool rainy weather. At this point the damage is done. I have  a little spotting on my spindle due to the rainy spring weather.

Mission Viejo, CA

Limited coastal influence

5-10 days of frost

IPS and PSSC Member

Jerry@TreeZoo Grand Master

Jerry@TreeZoo

Posted
Posted

Classic Potassium deficiency.  Don't bother with fungicide.   SulPomag or K-Mag, 0-0-21 is your friend.

  • Like 2
  • Upvote 2

So many species,

so little time.

Coconut Creek, Florida

Zone 10b (Zone 11 except for once evey 10 or 20 years)

Last Freeze: 2011,50 Miles North of Fairchilds

Brett in Mission Viejo Proficient

Brett in Mission Viejo

Posted
Posted

I told you I could be wrong :). 

  • Like 1

Mission Viejo, CA

Limited coastal influence

5-10 days of frost

IPS and PSSC Member

Jerry@TreeZoo Grand Master

Jerry@TreeZoo

Posted
Posted

I thought I was wrong once, but I was mistaken.

  • Like 1

So many species,

so little time.

Coconut Creek, Florida

Zone 10b (Zone 11 except for once evey 10 or 20 years)

Last Freeze: 2011,50 Miles North of Fairchilds

joe_OC Grand Master

joe_OC

Posted
  • Author
Posted

Already treated with Potassium Chloride:  0-0-62.  

Huntington Beach, CA

USDA Zone 10a/10b

Sunset Zone 24

Jerry@TreeZoo Grand Master

Jerry@TreeZoo

Posted
Posted

I like the 0-0-21 because it also has 10% Magnesium, very often deficient as well.  I think it forestalls a K imbalance or tie-up situation as well.  That is the extent of my chemistry knowledge.

So many species,

so little time.

Coconut Creek, Florida

Zone 10b (Zone 11 except for once evey 10 or 20 years)

Last Freeze: 2011,50 Miles North of Fairchilds

sonoranfans Grand Master

sonoranfans

Posted
Posted

My fungal spotting on butia and butia hybrids never had all that yellowing.  I second potassium deficiency.  WHen you use slow release fertilizer, the first thing to go is potassium its the most water soluble nutrient.  Here in florida its the #1 deficiency problem with our high drainage sandy soils and rain.  I would use controlled release or fertilize with palm gain 2x as often.  And yes correction with sulpomag is the ticket once you have obvious K deficiency.  The blotchy yellow spotting is unmistakable.

  • Like 1
  • Upvote 1

Formerly in Gilbert AZ, zone 9a/9b. Now in Palmetto, Florida Zone 9b/10a??

 

Tom Blank

joe_OC Grand Master

joe_OC

Posted
  • Author
Posted

Thank you, All.  I will get some Sul Po Mag and incorporate.  Really surprised though as I just fertilized with Palm Gain a month ago.

Huntington Beach, CA

USDA Zone 10a/10b

Sunset Zone 24

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