Best Fertilizer for Potato Plants: The 2026 Protocol for Maximum Yield

Comparison of common scab on potato skin vs healthy potato grown in acidic soil pH 5.2.

2026 Potato Nutrient Schedule Direct Answer: Apply high-nitrogen fertilizer during vegetative growth, phosphorus-rich amendments at planting for Tuber Initiation, and potassium-dominant formulas during Tuber Bulking to maximize Specific Gravity and prevent watery potatoes. Maintain soil pH between 4.8-5.5 using Elemental Sulfur to suppress Common Scab. The Scab vs. pH Rule: Why Acidity Determines Marketability The