Best Phosphorus Fertilizer (0-46-0): Triple Superphosphate for Root & Bloom Development Buy on Old Cobblers Farm
When your soil needs phosphorus and nothing else, this is the product. 46% available phosphate from pure triple superphosphate — the most efficient phosphorus delivery in a single bag.
Old Cobblers Farm™ Wicked Growth 0-46-0 Fertilizer – Triple Superphosphate (TSP)
by Conventional Fertilizer — Littleton, NH
46% Pure Phosphorus
The most concentrated phosphorus source available. Every pound delivers maximum P₂O₅ without nitrogen or potassium diluting the formula.
Drives Root Development
Phosphorus is the engine of root growth. Critical for transplant establishment, seedling vigor, and deep root systems in trees and shrubs.
Triggers Bloom & Fruit Set
Phosphorus fuels flower bud formation and fruit development. Essential for roses, annuals, fruit trees, and any flowering crop.
Targeted P Correction
Zero N, zero K means you address phosphorus deficiency without adding nutrients your soil doesn't need. Precision feeding for soil-test-based programs.
5,000 sq ft Coverage
At the light rate, one 5 lb bag covers up to 5,000 sq ft. Highly concentrated — a little goes a long way.
Perfect for Bulbs & Transplants
Work into the planting hole for transplants, mix into bulb beds in fall. Phosphorus stays in the root zone where plants need it most.
Blends With Any Program
Add to your existing fertilizer rotation alongside nitrogen and potassium products. No interference, no imbalance.
Trusted by 20,000+ Growers
Developed in Littleton, New Hampshire. Sold nationwide on Amazon, Walmart, eBay, and theoldcobblersfarm.com.
| NPK Ratio | 0-46-0 |
| 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 | 0-46-0 |
| Nitrogen | 0% |
| Phosphorus | 46% available phosphate |
| Potassium | 0% |
| Form | Granular |
| Rate | 1–2 lbs / 1,000 sq ft |
| Method | Broadcast, band, or incorporate |
| Sizes | 5, 10, 15, 20 lb bags |
| Best For | P-deficient soils, transplants, bulbs, bloom crops |
| Feature | Old Cobblers Farm™ Wicked Growth 0-46-0 Fertilizer – Triple Superphosphate (TSP) Old Cobblers Farm | Triple Phosphate (TP6) Espoma | Triple Super Phosphate Hi-Yield (VPG) | Triple Superphosphate Sta-Green | Triple Super Phosphate 0-46-0 Easy Peasy Plants | Triple Super Phosphate Bloom Booster CZ Garden Organics | Triple Super Phosphate Bulb Booster Seed Ranch | Triple Superphosphate + 13.5% Calcium Supply Solutions |
|---|---|---|---|---|---|---|---|---|
| NPK | 0-46-0 | 0-45-0 | 0-45-0 | 0-45-0 | 0-46-0 | 0-46-0 | 0-46-0 | 0-45-0 |
| 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–$18 | $10–$15 | $9.98 | $13–$55 | $15–$20 | $20–$78 | $15–$80 |
| Our Take | The highest phosphorus concentration in a granular fertilizer. 2.3 ... | — | — | — | — | — | — | — |
Triple Phosphate (TP6)
Triple Super Phosphate
Triple Superphosphate
Triple Super Phosphate 0-46-0
Triple Super Phosphate Bloom Booster
Triple Super Phosphate Bulb Booster
Triple Superphosphate + 13.5% Calcium
46% Pure Phosphorus
The most concentrated phosphorus source available. Every pound delivers maximum P₂O₅ without nitrogen or potassium diluting the formula.
Drives Root Development
Phosphorus is the engine of root growth. Critical for transplant establishment, seedling vigor, and deep root systems in trees and shrubs.
Triggers Bloom & Fruit Set
Phosphorus fuels flower bud formation and fruit development. Essential for roses, annuals, fruit trees, and any flowering crop.
Targeted P Correction
Zero N, zero K means you address phosphorus deficiency without adding nutrients your soil doesn't need. Precision feeding for soil-test-based programs.
