Potassium
Symptoms
Scorched leaf margins, dark bronzed leaves and small tubers.
Correction
Potassium fertilizers in the basal dose and during bulking.
Vegetables · Solanum tuberosum
Potato fertilizer and nutrition guide
High potassium demand with calcium and magnesium support for more, larger and better-quality tubers.
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About Potato nutrition
Potato has one of the highest potassium requirements of any crop. Good early nitrogen and phosphorus build the plant and tuber numbers, while potassium, calcium and magnesium during tuber bulking decide yield and quality.
- Climate
- Cool-season crop; tubers form best at about 15-20 °C. In India it is grown mainly in rabi season in the plains.
- Soil
- Loose, well-drained sandy loam to loam, pH around 5.5-6.5.
Stage-wise nutrient management for Potato
What the crop needs most at each growth stage.
Planting & sprouting
Phosphorus and a basal dose of organic manure for sprout and root development.
Vegetative growth
Nitrogen for canopy development, applied in splits around earthing up.
Tuber initiation
Phosphorus and potassium to set a good number of tubers.
Tuber bulking
High potassium plus calcium and magnesium for tuber size and quality.
Common nutrient deficiencies in Potato
How to recognise them in the field and how they are usually corrected.
Magnesium
Symptoms
Yellowing between veins on older leaves.
Correction
Magnesium sulphate as soil application or foliar spray.
Calcium
Symptoms
Internal brown spots in tubers and weak sprout tips.
Correction
Calcium nitrate through drip or calcium-rich soil amendments.
Need a Potato fertilizer schedule?
Exact doses depend on your soil test, variety and irrigation. Tell us your crop stage, area and location and we will recommend the right products and quantities.
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