Bone Meal Fertilizer 3-15-0
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Organic Bone Meal 3-15-0 Fertilizer
Premium organic bone meal fertilizer enriched with 24% calcium. Sourced from bovine bone (not produced with genetic engineering). This slow-release phosphorus powerhouse promotes robust root development, abundant flowering, and strengthens plant cell walls. Perfect for bulbs, transplants, and flowering plants seeking natural, sustained nutrition.
Last updated: August 2025 • Horticulturist reviewed
🌱Organic Bone Meal
🐄Bovine Source
📦Free Shipping $35+
🇺🇸Made in USA
Bone Meal Benefits Timeline
Weeks 1-2🌱Root Growth
(soil temps ≥50°F)
(soil temps ≥50°F)
Weeks 3-4💪Stronger Stems
Weeks 5-8🌸More Blooms
3-4 Months🍅Better Fruits
Perfect For These Applications
Bulbs & Tubers
1 tbsp per bulb
Vegetables
0.5–1 lb per 10 sq ft
Flowers
1 cup per plant
Trees & Shrubs
1–2 cups per plant
Common Garden Problems? Bone Meal Solutions
😟 Poor root development?
✅ 15% phosphorus promotes strong root systems
😟 Few flowers or fruits?
✅ High P triggers abundant blooming & fruiting
😟 Blossom end rot on tomatoes?
✅ 24% calcium prevents calcium deficiencies
😟 Need organic certification?
✅ Repackaged from organic bone meal
🦴 15% Phosphorus
Essential for root development, flowering, and fruit production in all plants
💪 24% Calcium
Strengthens cell walls, prevents diseases, and improves fruit quality
⏰ Slow Release
Feeds plants for 3-4 months with gentle, sustained nutrition
Pairs Well With
Complete your organic garden nutrition program
⚠️ Important Application Guidelines
- Keep away from pets - attractive smell but not for consumption
- Mix thoroughly into soil, water in well after mixing to deter animals
- Consider using in fenced areas if pets dig
- Store in cool, dry place in sealed container
- Wear gloves when handling
- Gentle on soil pH. Most effective at soil pH ≤7.0; in alkaline soils, phosphorus becomes less available
- Check soil test results before reapplying - phosphorus can build up over time
Quick Application Guide
Select a plant type above
KEY FEATURES & BENEFITS
- Optimal N-P-K Ratio (3-15-0): Balanced nutrition with emphasis on phosphorus for roots and blooms
- High Calcium Content (24%): Strengthens plant cell walls and prevents calcium-related disorders
- Repackaged from Organic Bone Meal: Sourced from 100% organic, non-GMO bovine bone meal
- Slow Release Formula: Provides nutrition for 3-4 months, reducing application frequency
- Versatile Application: Perfect for vegetables, fruits, flowers, bulbs, and ornamentals
- Enhanced Soil Biology: Feeds beneficial microorganisms while nourishing plants
- Low Risk of Burn: Gentle formula when used as directed
- Improves Soil Structure: Adds organic matter and improves soil tilth over time
- Disease Resistance: Calcium helps plants resist fungal and bacterial diseases
- Gentle on Soil pH: Minimal effect on soil pH when used at recommended rates
APPLICATION RATES & TIMING
Apply bone meal at planting time for best results. Work into soil before planting or mix into planting holes. Note: Application rates are general guidelines - always consider soil test results as phosphorus can accumulate.
🌱 General Application Rates
| Application Type | Rate | Instructions |
|---|---|---|
| Soil Preparation | 1 lb per 10 sq ft | Mix into top 6" of soil |
| Flowers | 1 cup per plant | Mix into soil around root zone |
| Shrubs & Small Trees | 1 cup under root ball | Plus 1 cup in backfill soil |
| Vegetables | 0.5–1 lb per 10 sq ft | Adjust based on soil P levels |
| Bulbs, Corn & Tubers | 1 tbsp per bulb | Mix 1–2" below bulb placement |
| Potted Plants | 1 tbsp per inch diameter | Mix into potting soil |
🌸 Specific Crop Guidelines
| Crop | Application Rate | When to Apply |
|---|---|---|
| Tomatoes | 2 tbsp per hole | At transplanting |
| Roses | 1–2 cups per bush | Early spring & after first bloom |
| Tulips/Daffodils | 1 tsp per bulb | Fall planting |
| Root Vegetables | 2 lbs per 25' row | Before seeding |
| Fruit Trees | 1–3 cups per tree | Early spring |
BONE MEAL CALCULATOR
Bone Meal Application Calculator
Calculate exact amounts for your garden needs (~2 cups/lb; grind may vary)
Vegetable Garden Calculator
📋 Standard rate: 0.5–1 pound per 10 sq ft (adjust based on soil test)
Flower Bed Calculator
📋 Standard rate: 1 cup per plant
Bulb Planting Calculator
📋 Standard rate: 1 tablespoon per bulb
Trees & Shrubs Calculator
📋 Standard rate: 1–2 cups per plant (more for larger plants)
Coverage by Area
📋 Calculate how much bone meal you need for your space
COMPARE WITH OTHER PHOSPHORUS SOURCES
| Feature | Bone Meal 3-15-0 | Rock Phosphate | Single Super (SSP) | Triple Super (TSP) | Blood Meal |
|---|---|---|---|---|---|
| Phosphorus (P₂O₅) | 15% | 3–5% | 16–20% | 44–46% | 1% |
| Calcium | 24% | 30% | 18–21% | 12–14% | 0% |
| Nitrogen | 3% | 0% | 0% | 0% | 13% |
| Sulfur | 0% | 0% | 11–12% | 1–2% | 0% |
| Release Speed | Slow (3–4 mo) | Very Slow | Fast | Fast | Fast |
| Organic | Yes | Yes | No | No | Yes |
| pH Effect | Minimal | Raises pH | Lowers pH | Lowers pH | Lowers pH |
QUICK REFERENCE GUIDE
📋 Application Quick Reference
General Garden:
0.5–1 lb per 10 sq ft
Mix into top 6" of soil
0.5–1 lb per 10 sq ft
Mix into top 6" of soil
Container Plants:
1 tbsp per inch of pot
Mix into potting soil
1 tbsp per inch of pot
Mix into potting soil
Transplants:
1–2 tbsp in hole
Mix with backfill soil
1–2 tbsp in hole
Mix with backfill soil
Established Plants:
1–2 cups per plant
Work into top 2" of soil
1–2 cups per plant
Work into top 2" of soil
≈2 cups per lb (varies by grind)
FREQUENTLY ASKED QUESTIONS
What is bone meal fertilizer best for?
Bone meal excels at promoting root development, flowering, and fruiting. It's ideal for bulbs (tulips, daffodils), transplants, root vegetables, and flowering plants like roses. The high phosphorus content (15%) triggers blooming while calcium (24%) strengthens cell walls and prevents disorders like blossom end rot in tomatoes.
How long does bone meal last in soil?
Bone meal is a slow-release fertilizer that continues feeding plants for 3–4 months. One application at planting typically lasts an entire growing season. The nutrients become available gradually as soil microorganisms break down the organic material. Note: bone meal works faster in warm soils (≥50°F) with active microbial life.
Can bone meal burn plants?
Low risk of burn when used as directed. Its slow-release nature provides gentle, sustained nutrition. However, excessive amounts can raise phosphorus levels too high, potentially interfering with micronutrient uptake, so follow recommended rates and consider soil testing.
Is bone meal good for tomatoes?
Absolutely! Bone meal is excellent for tomatoes. The phosphorus promotes strong root systems and fruit development, while the 24% calcium content helps prevent blossom end rot. Apply 2 tablespoons in each planting hole at transplant time.
When should I apply bone meal?
Apply bone meal at planting time for best results. Mix it into the soil before planting or add to planting holes. For established plants, work it into the top 2" of soil in early spring as growth begins. Fall application works well for spring bulbs.
Will bone meal attract animals?
Yes, the smell can attract dogs and wildlife. Always mix bone meal thoroughly into the soil and water in well after application. Store in sealed containers and consider using it in fenced areas if animals are a concern.
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