Best Evergreen Fertilizer (10-10-10 + Iron): Balanced NPK with Iron to Prevent Yellowing & Maintain Deep Green Foliage Buy on Old Cobblers Farm
Evergreens don't drop their needles and regrow every spring — the foliage they have is the foliage you see year-round. When it yellows from iron deficiency or nutrient stress, the whole plant looks sick. This 10-10-10 + Iron keeps needles deep green and healthy all year.
Old Cobblers Farm™ Wicked Growth Evergreen Fertilizer
by Conventional Fertilizer — Littleton, NH
Iron Prevents Yellowing
Supplemental iron addresses iron chlorosis — the most common cause of yellowing needles in pines, spruces, and arborvitae, especially in alkaline or high-pH soils.
Deep Green Foliage Year-Round
Iron boosts chlorophyll production for the rich, dark green color that defines healthy evergreens. Visible improvement in needle color within weeks of application.
Balanced 10-10-10 Base
Equal NPK supports steady growth without the flush of soft new growth that makes evergreens vulnerable to winter burn and snow damage.
Drip Line Dosing
1 lb per 10 ft of drip line diameter. Simple measurement — stand under the tree, pace the canopy edge, and apply accordingly.
Winter Hardiness Support
Potassium strengthens cell walls and regulates water in needles and wood, reducing winter desiccation and frost damage — critical for exposed evergreens in cold climates.
Spring + Early Summer
Feed in early spring as growth resumes and optionally again in early summer. Stop by mid-summer so new growth hardens before winter.
All Evergreen Species
Pines, spruces, arborvitae, hollies, junipers, yews, hemlocks, firs, cedars, boxwood — every evergreen benefits from balanced feeding with iron.
Trusted by 20,000+ Growers
Developed in Littleton, New Hampshire. Sold nationwide on Amazon, Walmart, eBay, and theoldcobblersfarm.com.
| NPK Ratio | 10-10-10 |
| Item Form | Granular |
| Coverage | One ~50 ft drip line tree or multiple smaller evergreens per 5 lb bag |
| Category | Conventional Fertilizer |
| Type | Trees & Shrubs |
| Sizes | 5 lb | 10 lb | 15 lb | 20 lb |
| NPK | 10-10-10 + Iron |
| Nitrogen | 10% |
| Phosphorus | 10% available phosphate |
| Potassium | 10% soluble potash |
| Bonus | Iron (Fe) for chlorosis prevention |
| Form | Granular |
| Rate | 1 lb / 10 ft drip line diameter |
| Method | Broadcast under drip line |
| Frequency | 1–2x per season |
| Sizes | 5, 10, 15, 20 lb bags |
| Best For | Pines, spruces, arborvitae, hollies, junipers, all evergreens |
| Feature | Old Cobblers Farm™ Wicked Growth Evergreen Fertilizer Old Cobblers Farm | Holly-tone Fertilizer Espoma Organic | Water Soluble Miracid Miracle-Gro | Evergreen Fertilizer Spikes Jobe's | Evergreen, Flowering Tree & Shrub Scotts | Acid Lovers Organic Fertilizer Dr. Earth | Acid Mix Fertilizer Down To Earth | Tree and Shrub Food Ferti-lome | 12 Month Tree & Shrub Protect BioAdvanced | Tree, Shrub & Evergreen Fertilizer Vigoro | Acid Lovers Plant Food True Organic |
|---|---|---|---|---|---|---|---|---|---|---|---|
| NPK | 10-10-10 | 4-3-4 | 30-10-10 | 11-3-4 | 11-7-7 | 4-3-6 | 4-3-6 | 19-8-10 | 2-1-1 | 16-4-8 | 4-5-4 |
| Form | Granular | — | — | — | — | — | — | — | — | — | — |
| Coverage | One ~50 ft drip line tree or multiple smaller evergreens 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 | $10-$40 | $8-$20 | $10-$35 | $12-$15 | $15-$30 | $16-$60 | $15-$40 | $25-$45 | $10-$25 | $14-$16 |
| Our Take | The evergreen-specific formula with balanced NPK plus supplemental ... | — | — | — | — | — | — | — | — | — | — |
Holly-tone Fertilizer
Water Soluble Miracid
Evergreen Fertilizer Spikes
Evergreen, Flowering Tree & Shrub
Acid Lovers Organic Fertilizer
Acid Mix Fertilizer
Tree and Shrub Food
12 Month Tree & Shrub Protect
Tree, Shrub & Evergreen Fertilizer
Acid Lovers Plant Food
Iron Prevents Yellowing
Supplemental iron addresses iron chlorosis — the most common cause of yellowing needles in pines, spruces, and arborvitae, especially in alkaline or high-pH soils.
Deep Green Foliage Year-Round
Iron boosts chlorophyll production for the rich, dark green color that defines healthy evergreens. Visible improvement in needle color within weeks of application.
Balanced 10-10-10 Base
Equal NPK supports steady growth without the flush of soft new growth that makes evergreens vulnerable to winter burn and snow damage.
Drip Line Dosing
1 lb per 10 ft of drip line diameter. Simple measurement — stand under the tree, pace the canopy edge, and apply accordingly.
