Potato Fertilizer Blend

Chloride-free 10-12-24 + Mg potato fertilizer using potassium sulphate as the K source to maximize tuber starch content and dry matter — key quality parameters for processing varieties (chips, fries). The chloride-free formulation prevents the osmotic stress that reduces specific gravity in tubers. High potassium promotes tuber sizing while magnesium (2% MgO) prevents early senescence. Apply 600–800 kg/ha at planting with optional 200 kg/ha at tuber initiation for premium chip-grade potatoes.

Ships within 3-5 business days

Sample available

ISO 9001 certified quality

24h customer support

Specifications

Target CropPotato

N-P-K + Mg10-12-24 + 2% MgO

FormGranular (Cl-free)

K SourceK₂SO₄

Packaging25kg / 50kg / Bulk

Categories: Crop-Specific Fertilizers, Fertilizers

Description
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ISO 9001:2015

REACH Compliant

EU Fertilizer Reg.

GMP Certified

Product Overview

Potato Fertilizer Blend (10-12-24 + 2% MgO) is a chloride-free formulation using potassium sulphate (K₂SO₄) as the K source — critical for maximizing tuber starch content and dry matter, the key quality parameters for processing varieties. Chloride-based potassium (MOP/KCl) causes osmotic dilution of tuber cells, reducing specific gravity by 0.005-0.010 units — the difference between chip-grade and feed-grade potatoes. This premium blend delivers the highest K₂O content (24%) in our crop-specific range, reflecting potato’s status as the heaviest potassium-feeding vegetable crop (250-350 kg K₂O/ha removal at 50 t/ha yield).

How Potato Fertilizer Blend Works

Potassium sulphate provides K⁺ ions without the chloride that disrupts starch granule formation in tuber amyloplasts. The 24% K₂O promotes tuber cell expansion, starch deposition, and skin integrity. Phosphorus (12% P₂O₅) supports the extensive root-stolon network that determines tuber number per plant. Magnesium (2% MgO) prevents the interveinal chlorosis common in potato crops on sandy soils, maintaining canopy photosynthesis during the critical tuber bulking phase. The moderate nitrogen (10%) provides sufficient N for canopy development without promoting excess vine growth that delays tuber initiation.

Key Benefits

Chloride-free K₂SO₄ base maximises tuber starch and specific gravity

24% K₂O — highest K content for heavy-feeding potato crops

2% MgO prevents chlorosis during critical tuber bulking

Optimised for chip, fry, and processing quality parameters

Moderate N avoids excess vine growth and delayed maturity

Band application design for precise tuber-zone placement

Suitable for all potato types: processing, fresh market, seed

Premium formulation for high-value processing contracts

Application Guide

Apply 600-800 kg/ha at planting, banded 5-10cm below and beside the seed tuber. For premium chip-grade: supplement with 200 kg/ha at tuber initiation (hook stage). Avoid late-season nitrogen which delays maturation, increases sugar content, and causes dark fry color in processing varieties. For seed potato production: reduce to 400-500 kg/ha to control tuber size distribution. Sandy soils: increase total by 15-20% to compensate for K leaching.

Ideal For

Processing potatoes (chips, fries)Fresh market potatoesSeed potato productionSweet potatoStarch potato varietiesOrganic potato (with certification)Early season varietiesLate/main crop varieties

Storage & Handling

Store in dry conditions. Chloride-free formulation has excellent granule stability. Shelf life: 24 months. Compatible with potato-specific banding equipment. Avoid applying in-furrow directly on seed tubers — maintain 5cm separation to prevent salt damage to seed piece.

Why Choose Dongkwang Poland?

Dongkwang Poland’s potato blend is formulated exclusively with K₂SO₄ — verified chloride-free (<1% Cl) by Certificate of Analysis. Many competitors use MOP-based blends that list ‘potassium’ without specifying the chloride-free source. Our transparent labeling and independent testing give you confidence that your processing contract quality parameters will be met.