Palm Yellowing with Brown Spots: Nutrient Deficiency vs. Fungus

Dual Approach

Yellow fronds with brown spots suggest either nutrient deficiency (potassium, magnesium, manganese) or fungal leaf spot.

Stepwise Treatment

1. Apply a complete palm fertilizer with all macro- and micronutrients.
2. Spray copper fungicide on all fronds to suppress fungal pathogens.
3. Wait. Existing damaged fronds won't recover; watch new emerging fronds for clean growth.

Soil pH Note

Baking soda raises pH temporarily but doesn't address the underlying issue. A soil test is the only way to know if pH correction is needed.