Best Blueberry Fertilizer (10-10-10): Balanced Granular for Berry Size, Yield & Bush Health Buy on Old Cobblers Farm
Blueberries need balanced nutrition applied at exactly the right time — early spring before bud break. This 10-10-10 delivers the NPK blueberry bushes need for flower set, berry sizing, and strong new cane growth in a simple once-per-season application.
Old Cobblers Farm™ Wicked Growth Blueberry Mix Fertilizer
by Conventional Fertilizer — Littleton, NH
Built for Blueberry Bushes
Blueberries are moderate feeders that respond well to balanced NPK. 10-10-10 supports flower bud development, berry sizing, and new cane growth without overfeeding.
Once Per Season — Early Spring
Apply before bud break in early spring. One application is all blueberries need — the balanced formula releases through bloom, fruit set, and harvest.
Simple Per-Bush Rate
1 cup for young bushes, 2 cups for established plants. Broadcast at the drip line and let rain or irrigation carry nutrients to the root zone.
6–11 Bushes Per Bag
One 5 lb bag feeds 6 large established bushes or up to 11 younger plants. Scale up with 10 or 20 lb bags for larger plantings.
Supports New Cane Growth
Balanced nitrogen fuels the new fruiting canes that produce next year's berries. Healthy cane renewal is the key to long-term blueberry productivity.
Add Sulfur Separately for pH
Blueberries need acidic soil (pH 4.5–5.5). This fertilizer provides NPK — apply elemental sulfur or ammonium sulfate separately if your soil pH is above 5.5.
All Blueberry Types
Highbush, half-high, lowbush, rabbiteye — every blueberry variety thrives on balanced feeding. Works in rows, backyard bushes, and container plantings.
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Developed in Littleton, New Hampshire. Sold nationwide on Amazon, Walmart, eBay, and theoldcobblersfarm.com.
| NPK Ratio | 10-10-10 |
| Item Form | Granular |
| Coverage | ~6–11 blueberry bushes per 5 lb bag |
| Category | Conventional Fertilizer |
| Type | Flower & Garden |
| Sizes | 5 lb | 10 lb | 15 lb | 20 lb |
| NPK | 10-10-10 |
| Nitrogen | 10% |
| Phosphorus | 10% available phosphate |
| Potassium | 10% soluble potash |
| Form | Granular |
| Rate | 1–2 cups / bush |
| Method | Broadcast at drip line |
| Frequency | 1x per season (early spring) |
| Sizes | 5, 10, 15, 20 lb bags |
| Best For | All blueberry varieties — highbush, half-high, lowbush, rabbiteye |
| Note | Add sulfur separately to maintain pH 4.5–5.5 |
| Feature | Old Cobblers Farm™ Wicked Growth Blueberry Mix Fertilizer Old Cobblers Farm | Espoma Organic Berry-Tone 4-3-4 Espoma | Espoma Organic Berry-Tone 4-3-4 Espoma |
|---|---|---|---|
| NPK | 10-10-10 | 4-3-4 | 4-3-4 |
| Form | Granular | Granular | Granular |
| Coverage | ~6–11 blueberry bushes per 5 lb bag | Not listed | Not listed |
| Price / Size | 5 lb | 10 lb | 15 lb | 20 lb | 23.46 | 23.46 |
| Our Take | The blueberry-specific formula with balanced NPK and a simple per-b... | Popular organic berry fertilizer. Mild NPK requires monthly application. Not specific enough for strawberry fruit quality optimization. | Popular organic berry fertilizer. Mild NPK requires monthly application. Not specific enough for strawberry fruit quality optimization. |
Espoma Organic Berry-Tone 4-3-4
Espoma Organic Berry-Tone 4-3-4
Built for Blueberry Bushes
Blueberries are moderate feeders that respond well to balanced NPK. 10-10-10 supports flower bud development, berry sizing, and new cane growth without overfeeding.
Once Per Season — Early Spring
Apply before bud break in early spring. One application is all blueberries need — the balanced formula releases through bloom, fruit set, and harvest.
Simple Per-Bush Rate
1 cup for young bushes, 2 cups for established plants. Broadcast at the drip line and let rain or irrigation carry nutrients to the root zone.
6–11 Bushes Per Bag
One 5 lb bag feeds 6 large established bushes or up to 11 younger plants. Scale up with 10 or 20 lb bags for larger plantings.
