Fertilizer for Camellias: NPK Guide and Application Rates
Camellias are elegant acid-loving shrubs that require light, carefully timed fertilization. Clemson University Extension recommends feeding camellias in spring after blooming ends, using an acid-forming fertilizer at a conservative rate. Camellias have fine, surface-level root systems that are easily damaged by salt accumulation from heavy fertilization. Bud drop, the most common camellia complaint, is more often caused by water stress than nutrient deficiency.
Quick Reference
What NPK Ratio is Best for Camellias?
The recommended NPK ratio for camellias is 4-8-8. The phosphorus-heavy 4-8-8 ratio supports strong root systems and flower/fruit production in camellias.
Camellias NPK needs shift at each growth stage. Gentle balanced feeding for newly planted camellias during the Seedling phase, then consistent feeding supports fall/winter bloom once flowering begins.
NPK by Growth Stage for Camellias
| Growth Stage | NPK Ratio | Notes |
|---|---|---|
| Seedling | 10N 10P 10K N 10% Nitrogen: leaf and stem growth P 10% Phosphorus: roots and flowers K 10% Potassium: health and disease resistance Learn more about NPK | Gentle balanced feeding for newly planted camellias |
| Vegetative | 4N 8P 8K N 4% Nitrogen: leaf and stem growth P 8% Phosphorus: roots and flowers K 8% Potassium: health and disease resistance Learn more about NPK | Low nitrogen acid-forming formula during spring growth |
| Flowering | 4N 8P 8K N 4% Nitrogen: leaf and stem growth P 8% Phosphorus: roots and flowers K 8% Potassium: health and disease resistance Learn more about NPK | Consistent feeding supports fall/winter bloom |
| Fruiting | 0N 0P 0K N 0% Nitrogen: leaf and stem growth P 0% Phosphorus: roots and flowers K 0% Potassium: health and disease resistance Learn more about NPK | Stop feeding by late summer for fall-blooming varieties |
When Should You Fertilize Camellias?
In zone 7, start fertilizing camellias in April. In zone 10, begin as early as February. Apply every 8 weeks through the growing season.
Which Zones Can Grow Camellias?
Camellias grows in USDA zones 7 through 10, spanning a 4-zone range.
Fertilization Start by Zone
| Zone | Start Month |
|---|---|
| Zone 7 | April |
| Zone 8 | March |
| Zone 9 | March |
| Zone 10 | February |
What Are the Best Fertilizer Products for Camellias?
Look for products with an NPK close to 4-8-8. Espoma Holly-tone is the most popular choice among home gardeners for camellias.
- Espoma Holly-tone
- Nelson's Azalea/Camellia
- 4-8-8 acid fertilizer
Prices vary by retailer and region. Check current pricing before purchasing.
Container and Raised Bed Adjustments for Camellias
Beautiful container specimens in 15+ gallon pots; feed monthly at quarter strength during spring and summer
Common Fertilizing Mistakes with Camellias
- Fertilizing during fall and winter bloom, which disrupts the flowering cycle.
- Applying fertilizer at full strength, burning the fine, shallow root system.
- Planting too deep; the root flare should be at or slightly above soil level.
- Blaming bud drop on fertilizer when inconsistent watering is the usual cause.
Tips for Fertilizing Camellias
- Feed in spring after flowering with an acid-forming fertilizer at half the label rate.
- Maintain soil pH between 5.0-6.5 using sulfur amendments and acidic mulch.
- Apply a light second feeding in early summer but stop by August to allow flower bud development.
- Mulch with pine bark or needles to protect shallow roots and maintain soil acidity.
Organic Fertilizer Alternatives for Camellias
Sources
Source:Clemson University ExtensionLast updated: