Figure 3. Potassium deficiency in palm exhibited primarily by dead leaf tips and yellowish coloration. Palms are being planted in more areas of North Carolina, not just near the coast, and potassium deficiency is a common issue for them.
Close-up of palm fronds with dead tips, brown and yellow discoloration.

Photo courtesy of Tim Broschat, Symptoms of Palm Diseases and Disorders, USDA APHIS PPQ, Bugwood.org.