Best Nut Tree Fertilizer (5-5-10): Double Potassium for Shell Quality, Kernel Fill & Long-Term Tree Health Buy on Old Cobblers Farm
Nut trees have unique nutritional demands that standard all-purpose fertilizers don't address. Shell hardness, kernel oil content, and nut sizing are all driven by potassium — and this 5-5-10 delivers double the K relative to nitrogen and phosphorus.
Old Cobblers Farm™ Wicked Growth Nut Trees Fertilizer
by Conventional Fertilizer — Littleton, NH
Double Potassium for Nut Quality
10% K — double the nitrogen and phosphorus percentage. Potassium is the #1 nutrient for shell hardness, kernel fill, oil content, and overall nut grade quality.
Per-Tree Application
1 cup for newly planted trees, 2–6 cups for established specimens scaled by trunk diameter. Broadcast under the drip line and let rain carry it to the root zone.
Low Nitrogen — No Excess Shoot Growth
5% nitrogen provides just enough for healthy canopy maintenance without triggering excessive shoot growth that steals energy from nut production and increases pruning labor.
Multiple Trees Per Bag
One 5 lb bag feeds 2–5 established nut trees or 11 new plantings per application. Scale up with larger bags for orchards.
Improves Nut Storage & Shelf Life
Adequate potassium reduces kernel rancidity by improving oil stability and moisture regulation in harvested nuts. Better K = longer shelf life after drying.
Spring + Mid-Summer
Feed in early spring as buds break and again in mid-summer during nut sizing. Two applications aligned to the nut development calendar.
All Nut Species
Pecans, walnuts, almonds, hazelnuts, chestnuts, hickory, macadamia, pistachio, and butternut — every nut tree benefits from K-heavy nutrition.
Trusted by 20,000+ Growers
Developed in Littleton, New Hampshire. Sold nationwide on Amazon, Walmart, eBay, and theoldcobblersfarm.com.
| NPK Ratio | 5-5-10 |
| Item Form | Granular |
| Coverage | ~2–5 established trees or ~11 new trees per 5 lb bag |
| Category | Conventional Fertilizer |
| Type | Trees & Shrubs |
| Sizes | 5 lb | 10 lb | 15 lb | 20 lb |
| NPK | 5-5-10 |
| Nitrogen | 5% |
| Phosphorus | 5% available phosphate |
| Potassium | 10% soluble potash |
| Form | Granular |
| Rate | 1 cup (new) to 2–6 cups (established) per tree |
| Method | Broadcast under drip line |
| Frequency | 1–2x per season |
| Sizes | 5, 10, 15, 20 lb bags |
| Best For | Pecan, walnut, almond, hazelnut, chestnut, hickory, all nut trees |
| Feature | Old Cobblers Farm™ Wicked Growth Nut Trees Fertilizer Old Cobblers Farm | Fruit & Nut Fertilizer Jobe's Organics | Fruit & Citrus Spikes Miracle-Gro | Tree-Tone Organic Espoma | Tree & Shrub Spikes SimplyGro | Nut and Berry Tree Food Arizona's Best | Natural Wonder Fruit Tree Dr. Earth | Citrus & Fruit Tree Bumper Crop | Fruit Tree Mix Down To Earth | Flowers & Fruit Organic AgroThrive | Fruit Tree Booster Farmer's Secret |
|---|---|---|---|---|---|---|---|---|---|---|---|
| NPK | 5-5-10 | 4-4-4 | 15-5-10 | 6-3-2 | 15-7-12 | 13-7-3 | 5-5-2 | 8-4-2 | 6-2-4 | 3-3-5 | Liquid |
| Form | Granular | — | — | — | — | — | — | — | — | — | — |
| Coverage | ~2–5 established trees or ~11 new trees per 5 lb bag | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed |
| Price / Size | 5 lb | 10 lb | 15 lb | 20 lb | $13.50 | $12.99 | $45.37 | $24.00 | $8.13 | $25.82 | $38.99 | $35.00 | $32.59 | $29.99 |
| Our Take | The only formula in the lineup purpose-built for nut-bearing trees.... | — | — | — | — | — | — | — | — | — | — |
Fruit & Nut Fertilizer
Fruit & Citrus Spikes
Tree-Tone Organic
Tree & Shrub Spikes
Nut and Berry Tree Food
Natural Wonder Fruit Tree
Citrus & Fruit Tree
Fruit Tree Mix
Flowers & Fruit Organic
Fruit Tree Booster
Double Potassium for Nut Quality
10% K — double the nitrogen and phosphorus percentage. Potassium is the #1 nutrient for shell hardness, kernel fill, oil content, and overall nut grade quality.
Per-Tree Application
1 cup for newly planted trees, 2–6 cups for established specimens scaled by trunk diameter. Broadcast under the drip line and let rain carry it to the root zone.
Low Nitrogen — No Excess Shoot Growth
5% nitrogen provides just enough for healthy canopy maintenance without triggering excessive shoot growth that steals energy from nut production and increases pruning labor.
Multiple Trees Per Bag
One 5 lb bag feeds 2–5 established nut trees or 11 new plantings per application. Scale up with larger bags for orchards.
