Palm Yellowing and Brown Spots: Manganese Deficiency (Frizzle Top)

Unified Diagnosis for Both Palms

Two unknown palms in perennial peanut lawn (nitrogen-fixing) with yellowing, brown spots, dying fronds—manganese deficiency ("frizzle top") is the primary cause in alkaline soils. Potassium alone won't fix it.

Correct Treatment

1. Apply manganese sulfate (not potassium) per label.
2. Test soil pH—if alkaline, acidify with sulfur.
3. Perennial peanut provides nitrogen—no N needed.

Why Palm Fertilizers Vary

Formulations differ by region/soil. "Palm special" should contain Mn, Mg, Fe, K. Your leftover potassium is incomplete. Buy a complete palm fertilizer with manganese.

Pictures would help confirm, but frizzle top is the classic presentation.