Best Deciduous Shrub Fertilizer (10-10-10): Balanced Nutrition for Healthy Foliage, Blooms & Winter Hardiness Buy on Old Cobblers Farm
Old Cobblers Farm™ Wicked Growth Deciduous Shrubs Fertilizer
by Wicked Growth — Littleton, NH
Per-Shrub Dosing
½ cup for small shrubs, up to 3 cups for large established specimens. Simple per-plant application — no sq ft math needed for landscape beds.
Balanced NPK for Full-Plant Health
10-10-10 feeds foliage, flowering, and roots equally. Deciduous shrubs need all three — leaf canopy for energy, blooms for beauty, and roots for winter survival.
Supports Bloom Production
10% phosphorus maintains flower bud formation in lilacs, hydrangeas, forsythia, and all flowering shrubs. Feeds the blooms without over-pushing vegetative growth.
Stop-Date Schedule Prevents Frost Damage
Feed every 6–8 weeks but stop by late summer. This schedule ensures shrubs harden off properly before winter — new growth triggered by late feeding is vulnerable to frost kill.
4–22 Shrubs Per Bag
One 5 lb bag feeds 4 large specimens or up to 22 small shrubs per application. Scale to your landscape needs.
Foundation & Hedgerow Ready
Works for foundation plantings, formal hedges, informal borders, and mixed shrub beds. One formula handles the entire deciduous shrub layer of your landscape.
All Deciduous Shrub Species
Lilac, forsythia, hydrangea, beautyberry, viburnum, spirea, weigela, ninebark, burning bush, dogwood — every deciduous shrub benefits from balanced feeding.
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 (4–53%) |
| Item Form | Granular |
| Release Speed | Moderate-release |
| Application Rate | ½–3 cups / shrub (by size) |
| Method | Broadcast under drip line |
| Frequency | Every 6–8 weeks during growing season; stop by late summer |
| Sizes | 5 lb | 10 lb | 15 lb | 20 lb |
| Supports | Lilac, forsythia, hydrangea, beautyberry, viburnum, spirea, weigela, ninebark, burning bush, dogwood, barberry |
| Setups | Foundation plantings, hedgerows, borders, mixed beds, specimen plantings |
| Feature | Old Cobblers Farm™ Wicked Growth Deciduous Shrubs Fertilizer | Plant-tone | Shake 'n Feed Flowering Trees | Smart-Release Flower & Indoor | Flower Girl Bud & Bloom Booster | Blossom Booster | Shrub Plant Food Spikes | Happy Frog Fruit & Flower | Shrub & Tree Plant Food | Rose & Flower Food | Hydrangea Blueing Formula |
|---|---|---|---|---|---|---|---|---|---|---|---|
| NPK | 10-10-10 | 5-3-2003 | 18-6-12 | 15-9-12 | 3-9-2004 | 10-30-20 | 4-4-2004 | 4-9-2003 | 4-2-2004 | 14-8-8 | 0-0-0 |
| Phosphorus | 10.0% | 3.0% | 6.0% | 9.0% | 9.0% | 30.0% | 4.0% | 9.0% | 2.0% | 8.0% | 0.0% |
| Potassium | 10.0% | 3.0% | 12.0% | 12.0% | 4.0% | 20.0% | 4.0% | 3.0% | 4.0% | 8.0% | 0.0% |
| Form | Granular | ||||||||||
| Sizes | 5 lb | 10 lb | 15 lb | 20 lb | 4-18 lb | 4.5 lb, 8 lb | 1-8 lb | 4 lb, 12 lb | 1.5 lb, 4 lb | 10-50 pk | 4 lb | 4 lb | 4 lb | 1 lb, 5 lb |
| Release Speed | Moderate-release |
Plant-tone
Shake 'n Feed Flowering Trees
Smart-Release Flower & Indoor
Flower Girl Bud & Bloom Booster
Blossom Booster
Shrub Plant Food Spikes
Happy Frog Fruit & Flower
Shrub & Tree Plant Food
Rose & Flower Food
Hydrangea Blueing Formula
Per-Shrub Dosing
½ cup for small shrubs, up to 3 cups for large established specimens. Simple per-plant application — no sq ft math needed for landscape beds.
Balanced NPK for Full-Plant Health
10-10-10 feeds foliage, flowering, and roots equally. Deciduous shrubs need all three — leaf canopy for energy, blooms for beauty, and roots for winter survival.
Supports Bloom Production
10% phosphorus maintains flower bud formation in lilacs, hydrangeas, forsythia, and all flowering shrubs. Feeds the blooms without over-pushing vegetative growth.
Stop-Date Schedule Prevents Frost Damage
Feed every 6–8 weeks but stop by late summer. This schedule ensures shrubs harden off properly before winter — new growth triggered by late feeding is vulnerable to frost kill.
