Best Blueberry Fertilizer (10-10-10): Balanced Granular for Berry Size, Yield & Bush Health Buy on Old Cobblers Farm
Old Cobblers Farm™ Wicked Growth Blueberry Mix Fertilizer
by Wicked Growth — 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.
Trusted by 20,000+ Growers
Developed in Littleton, New Hampshire. Sold nationwide on Amazon, Walmart, eBay, and theoldcobblersfarm.com.
| NPK Ratio | 10-10-10 |
| Derived From | Urea (10–20%), Diammonium Phosphate (10–20%), Potassium Chloride / Muriate of Potash (40–50%), Silicon Dioxide (4–5%) |
| Item Form | Granular |
| Release Speed | Moderate-release |
| Application Rate | 1–2 cups / bush (at drip line) |
| Method | Broadcast at drip line |
| Frequency | 1x per season (early spring before bud break) |
| Sizes | 5 lb | 10 lb | 15 lb | 20 lb |
| Supports | All blueberry varieties — highbush, half-high, lowbush, rabbiteye, northern highbush, southern highbush |
| Setups | Blueberry rows, backyard bushes, containers, raised beds, U-pick operations |
| Feature | Old Cobblers Farm™ Wicked Growth Blueberry Mix Fertilizer | Espoma Organic Berry-Tone 4-3-4 | Espoma Organic Berry-Tone 4-3-4 |
|---|---|---|---|
| NPK | 10-10-10 | 2004-04-03 00:00:00 | 2004-04-03 0:00:00 |
| Phosphorus | 10.0% | 3.0% | 3.0% |
| Potassium | 10.0% | 4.0% | 4.0% |
| Form | Granular | Granular | Granular |
| Sizes | 5 lb | 10 lb | 15 lb | 20 lb | 4 lb (2-pack) | 4 lb (2-pack) |
| Release Speed | Moderate-release | Slow | Slow |
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.
