Sable Palm Leaf Damage?

[RFerraris]

Hello,  Thanks for taking the time to review and hopefully give me some help.

I have (2) 14-16' which I think are Sable Palms, planted 3 years ago.  Central Florida.  Until the past month, the palms have been doing well, with lots of new growth.  I have fertilized twice per year and water with emitters 20 min, 3X per week.  Weather got hot in the last month 85-95 degrees.  

Last month over a period of 1 week, the palm leaves started to turn orange on both palms, and now some have browned out, not so much at the tips but the whole leaf.  I do not see any evidence of aphids, scale or other pests.  What do think it could be?  Am I overwatering, underwatering, Nutrient deficiency??  I can send more photos if that helps.

Thank you

 

 

[Merlyn]

@RFerraris welcome to Palmtalk!  Initially it looks like a potassium deficiency, which looks like random spotting of yellow on the older leaves.  Can you post a photo of the whole palm?  And what fertilizer are you using, and how much?