Best Potassium Fertilizer (0-0-60): Pure K₂O for Targeted Deficiency Correction Buy on Old Cobblers Farm
When your soil test says potassium-deficient, this is the only product you need. 60% soluble potash with zero nitrogen and zero phosphorus — pure correction without throwing off your N or P balance.
Old Cobblers Farm™ Wicked Growth 0-0-60 Fertilizer – Potassium (Muriate of Potash)
by Conventional Fertilizer — Littleton, NH
60% Pure Potassium
The highest K₂O concentration on the market. Every pound delivers maximum potassium with no wasted nitrogen or phosphorus diluting the formula.
Sulfate of Potash Base
Derived from sulfate of potash — lower salt index than muriate of potash. Safer for chloride-sensitive crops like berries, potatoes, and tobacco.
Targeted Deficiency Correction
Zero N, zero P means you can address potassium deficiency without adding nutrients your soil doesn't need. Precision feeding at its best.
5,000 sq ft per Bag
At the light rate, one 5 lb bag covers up to 5,000 sq ft. That's an entire suburban lawn from a single bag.
Improves Fruit Quality & Storage
Potassium regulates water uptake, strengthens cell walls, boosts sugar content in fruit, and extends post-harvest storage life across all crops.
Strengthens Stress Resistance
Adequate potassium improves drought tolerance, disease resistance, and winter hardiness in lawns, perennials, and woody plants.
Works With Any Fertilizer Program
Mix into your existing NPK rotation. Apply alongside nitrogen or phosphorus products without interference. Perfect for custom blending.
Trusted by 20,000+ Growers
Developed in Littleton, New Hampshire. Sold nationwide on Amazon, Walmart, eBay, and theoldcobblersfarm.com.
| NPK Ratio | 0-0-60 |
| Item Form | Granular |
| Coverage | 2,500–5,000 sq ft per 5 lb bag |
| Category | Conventional Fertilizer |
| Type | All-Purpose NPK Blends |
| Sizes | 5 lb | 10 lb | 15 lb | 20 lb |
| NPK | 0-0-60 |
| Nitrogen | 0% |
| Phosphorus | 0% |
| Potassium | 60% soluble potash |
| Form | Granular |
| Rate | 1–2 lbs / 1,000 sq ft |
| Method | Broadcast, side-dress, or band |
| Sizes | 5, 10, 15, 20 lb bags |
| Best For | K-deficient soils, lawns, gardens, orchards |
| Feature | Old Cobblers Farm™ Wicked Growth 0-0-60 Fertilizer – Potassium (Muriate of Potash) Old Cobblers Farm | Potash 0-0-60 Espoma | Muriate of Potash 0-0-60 Hi-Yield (VPG) | Muriate of Potash 0-0-60 Supply Solutions | All-Natural Muriate of Potash 0-0-60 Easy Peasy Plants | Muriate of Potash 0-0-60 CZ Garden Organics | Natural Potash 0-0-60 Garden Naturals | Sulfate of Potash 0-0-50 Southern Ag |
|---|---|---|---|---|---|---|---|---|
| NPK | 0-0-60 | 0-0-60 | 0-0-60 | 0-0-60 | 0-0-60 | 0-0-60 | 0-0-60 | 0-0-50 |
| Form | Granular | — | — | — | — | — | — | — |
| Coverage | 2,500–5,000 sq ft per 5 lb bag | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed |
| Price / Size | 5 lb | 10 lb | 15 lb | 20 lb | $14–$17 | $8–$15 | $12–$40 | $13–$41 | $17–$22 | $14–$35 | $20–$93 |
| Our Take | The highest potassium concentration available in a granular fertili... | — | — | — | — | — | — | — |
Potash 0-0-60
Muriate of Potash 0-0-60
Muriate of Potash 0-0-60
All-Natural Muriate of Potash 0-0-60
Muriate of Potash 0-0-60
Natural Potash 0-0-60
Sulfate of Potash 0-0-50
60% Pure Potassium
The highest K₂O concentration on the market. Every pound delivers maximum potassium with no wasted nitrogen or phosphorus diluting the formula.
Sulfate of Potash Base
Derived from sulfate of potash — lower salt index than muriate of potash. Safer for chloride-sensitive crops like berries, potatoes, and tobacco.
Targeted Deficiency Correction
Zero N, zero P means you can address potassium deficiency without adding nutrients your soil doesn't need. Precision feeding at its best.
5,000 sq ft per Bag
At the light rate, one 5 lb bag covers up to 5,000 sq ft. That's an entire suburban lawn from a single bag.
