[Arid_gardener] Potassium deficiency in Hong Kong Orchid

[Glenn C. Wright]

You wrote:

Our young Hong Kong orchid tree shows rather severe signs of 
potassium deficiency.  In my store of fertilizers, none has more than 
15% K.  Grocery stores sell 40-pound bags of potassium chloride 
pellets for water softening.  If I crushed a few pellets, would they 
make a suitable potassium supplement for the tree?

Bill Woody

Hello Mr. Woody:

It is quite unlikely that you have potassium deficiency in your 
orchid tree.  This is because potassium is relatively common in 
Arizona soils.  It is more likely that you have iron or zinc 
deficiency on your tree and you should consider applying these 
elements rather than potassium.

Best of luck,

GCW

Glenn C. Wright, Ph.D.
Citrus and Date Palm Specialist
University of Arizona - Yuma Mesa Agriculture Center
2186 W. County 15th Street
Somerton, AZ 85350
Phone: 928-726-4260
FAX: 928-726-1363
e-mail: gwright at ag.arizona.edu  
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