Organic Phosphorus + Calcium
Best Organic Bone Meal (3-15-0): Slow-Release Phosphorus & 24% Calcium for Root Power, Blooms & Blossom End Rot Prevention Buy on Old Cobblers Farm
Old Cobblers Farm™ Wicked Organics Bone Meal
by Wicked Organics — Littleton, NH
3-15-0
N-P-K Ratio
"The organic gold standard for phosphorus and calcium delivery. 15% P₂O₅ from steamed bone releases slowly through microbial activity, feeding roots and blooms for weeks while 24% calcium prevents the deficiencies that ruin tomatoes, peppers, and fruit crops."
15%
Phosphorus (P₂O₅)
24%
Calcium
200 ft²
Max Coverage / bag
4 Sizes
5, 10, 15, 20 lbs
15% Slow-Release Phosphorus
Phosphorus from bone meal releases through soil microbial activity — not water solubility. This means steady, sustained feeding that lasts weeks longer than synthetic phosphorus sources.
24% Calcium Built In
Bone is primarily calcium phosphate. Every application delivers 24% calcium that prevents blossom end rot in tomatoes and peppers, strengthens cell walls, and improves fruit quality.
Root Development Powerhouse
The go-to organic amendment for transplant establishment, bulb planting, and new tree installations. Phosphorus in the root zone drives immediate root extension and anchorage.
Bloom Booster for Organic Gardens
Roses, perennials, and flowering shrubs respond to bone meal with increased flower bud formation and larger, more vibrant blooms. The organic alternative to synthetic bloom boosters.
Feeds the Soil Biology
Unlike synthetic phosphorus, bone meal feeds soil microbes as they break it down. Healthy microbial populations improve overall soil health, structure, and nutrient cycling.
Per-Hole or Per-Bed Application
1–2 tablespoons per planting hole for transplants and bulbs, or 2.5–5 lbs per 100 sq ft broadcast and incorporated for beds. Flexible for any planting method.
OMRI-Compatible Organic Input
Steamed bone meal is approved for organic production. Safe for certified organic gardens and farms following NOP guidelines.
Trusted by 20,000+ Growers
Developed in Littleton, New Hampshire. Sold nationwide on Amazon, Walmart, eBay, and theoldcobblersfarm.com.
| NPK Ratio | 3-15-0 |
| Derived From | Steamed bone meal (100%) |
| Item Form | Granular powder |
| Release Speed | Slow-release (biologically driven) |
| Application Rate | 2.5–5 lbs / 100 sq ft (beds) | 1–2 tbsp / planting hole |
| Method | Mix into top 3–4" of soil or incorporate into planting hole |
| Frequency | 1–2x per season (pre-plant + mid-season) |
| Sizes | 5 lb | 10 lb | 15 lb | 20 lb |
| Supports | Bulbs, transplants, root crops, roses, fruit trees, tomatoes, perennials, all flowering plants |
| Setups | Garden beds, raised beds, containers, orchards, flower borders, bulb beds |
What We Love
✓ 15% slow-release organic phosphorus from steamed bone
✓ 24% calcium prevents blossom end rot and strengthens cell walls
✓ Feeds soil biology as microbes break it down
✓ Per-hole and per-bed rates for flexible application
✓ OMRI-compatible for certified organic production
Worth Noting
— Slow-release — takes 1–2 weeks for microbial activation vs. instant synthetic
— May attract animals if not incorporated into soil
Buy on Old Cobblers Farm →
Available in 5 lb | 10 lb | 15 lb | 20 lb
| Feature | Old Cobblers Farm™ Wicked Organics Bone Meal | Espoma Organic Bone Meal 4-12-0 | Down To Earth Organic Bone Meal 3-15-0 | Burpee Natural Organic Bone Meal 6-8-0 | Jobe's Organics Granular Bone Meal 2-14-0 | FoxFarm Happy Frog Steamed Bone Meal 3-12-0 | True Organic Bone Meal 7-7-0 | Earth Science Natural Bone Meal 2-17-0 | Espoma Organic Bone Meal 4-12-0 | Down To Earth Organic Bone Meal 3-15-0 | Burpee Natural Organic Bone Meal 6-8-0 | Jobe's Organics Granular Bone Meal 2-14-0 | FoxFarm Happy Frog Steamed Bone Meal 3-12-0 | True Organic Bone Meal 7-7-0 | Earth Science Natural Bone Meal 2-17-0 | Organic Bone Meal Fertilizer | Organic Bone Meal | Granular Bone Meal Fertilizer | Natural & Organic Bone Meal | Organic Bone Meal Fertilizer | Happy Frog Steamed Bone Meal Fertilizer | Bone Meal | Bone Meal | Bone Meal | Bone Meal Granular | Bone Meal Fertilizer | Bone Meal 3-15-0 | Fish Bone Meal | Bone Meal | Bone Meal Plant Food | Bone Meal | Peace of Mind Bone Meal |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NPK | 3-15-0 | 2000-04-12 00:00:00 | 2000-03-15 00:00:00 | 2000-06-08 00:00:00 | 2000-02-14 00:00:00 | 2000-03-12 00:00:00 | 2000-07-07 00:00:00 | 2000-02-17 00:00:00 | 2000-04-12 0:00:00 | 2000-03-15 0:00:00 | 2000-06-08 0:00:00 | 2000-02-14 0:00:00 | 2000-03-12 0:00:00 | 2000-07-07 0:00:00 | 2000-02-17 0:00:00 | 4-12-2000 | 3-15-2000 | 2-14-2000 | 6-8-2000 | 3-15-2000 | 3-12-2000 | 7-7-2000 | 3-15-2000 | 4-12-2000 | 2-14-2000 | 6-8-2000 | 3-15-2000 | 4-12-2000 | 7-7-2000 | 3-15-2000 | 3-15-2000 | 3-15-2000 |
| Phosphorus | 15.0% | 12.0% | 15.0% | 8.0% | 14.0% | 12.0% | 7.0% | 17.0% | 12.0% | 15.0% | 8.0% | 14.0% | 12.0% | 7.0% | 17.0% | 12.0% | 15.0% | 14.0% | 8.0% | 15.0% | 12.0% | 7.0% | 15.0% | 12.0% | 14.0% | 8.0% | 15.0% | 12.0% | 7.0% | 15.0% | 15.0% | 15.0% |
| Potassium | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
| Form | Granular powder | Powder | Granular powder | Fine granular | Prilled granular (low dust) | Fine-screened granular | Granular | Granular | Powder | Granular powder | Fine granular | Prilled granular (low dust) | Fine-screened granular | Granular | Granular | |||||||||||||||||
| Sizes | 5 lb | 10 lb | 15 lb | 20 lb | 4 lb | 10 lb | 24 lb | 5 lb | 25 lb | 40 lb | 3 lb | 4 lb | 4 lb | 3 lb | 25 lb | 3 lb | 4 lb | 4 lb | 10 lb | 24 lb | 5 lb | 25 lb | 40 lb | 3 lb | 4 lb | 4 lb | 3 lb | 25 lb | 3 lb | 4 lb | 0.5, 5, 15, 25, 40, 50 lb | 4, 8, 10, 24 lb | 4 lb | 3 lb | 5, 10, 25, 50 lb | 5, 25, 50 lb | 3 lb | 3 lb | 3 lb | 4 lb | |||||||
| Release Speed | Slow-release (biologically driven) | Slow (1-4 months) | Slow (1-4 months) | Slow (1-4 months) | Slow (1-4 months) | Slow (1-4 months) | Slow (1-4 months) | Slow (1-4 months) | Slow (1-4 months) | Slow (1-4 months) | Slow (1-4 months) | Slow (1-4 months) | Slow (1-4 months) | Slow (1-4 months) | Slow (1-4 months) |
The Competition
Espoma Organic Bone Meal 4-12-0
by Espoma
— Millville, NJ
2000-04-12 00:00:00
N-P-K
FormPowder
Sizes4 lb | 10 lb | 24 lb
Price~$10.52 (4 lb) / ~$20 (10 lb) / ~$50.84 (24 lb)
Per Unit~$2.00-2.63/lb
Ingredients100% all natural domestic bone meal
OrganicOMRI registered organic input
App. Rate10 lbs per 100 sq ft; 1 tsp per bulb
CoverageNot listed
Best ForBulbs, flowering plants, root crops
ClaimsMarket leader; 7K+/month sales; since 1929; safe for people, pets & planet; solar-powered mfg
Dominant category leader by volume and reviews (9,900+). But powder form can be messy.
Down To Earth Organic Bone Meal 3-15-0
by Down To Earth
— Eugene, OR
2000-03-15 00:00:00
N-P-K
FormGranular powder
Sizes5 lb | 25 lb | 40 lb
Price~$16-20 (5 lb) / ~$45-55 (25 lb)
Per Unit~$1.80-2.20/lb (25 lb)
IngredientsSteamed bone meal
OrganicYes — OMRI + CDFA Listed
App. Rate1-3 lbs per 100 sq ft; 1-2 tbsp per transplant hole
CoverageNot listed
Best ForBulbs, transplants, flowering plants, root crops
ClaimsHighest P (15%) + highest Ca (18%); OMRI + CDFA; no fillers; Transparency verified
Best guaranteed analysis in category. Dual cert. But premium pricing.
Burpee Natural Organic Bone Meal 6-8-0
by Burpee
— Warminster, PA
2000-06-08 00:00:00
N-P-K
FormFine granular
Sizes3 lb
Price~$9-12 (3 lb)
Per Unit~$3.00-4.00/lb
IngredientsBone meal
OrganicYes — OMRI Listed
App. RatePer package directions
CoverageNot listed
Best ForTomatoes, peppers, bulbs
ClaimsSince 1876; OMRI listed; deters rabbits; highest N in bone meal (6%)
Unusual 6-8-0 NPK — high N, low P vs competitors. Rabbit deterrent claim. But only 3 lb size.
Jobe's Organics Granular Bone Meal 2-14-0
by Jobe's Organics
— USA
2000-02-14 00:00:00
N-P-K
FormPrilled granular (low dust)
Sizes4 lb
Price~$5.96-9.99 (4 lb)
Per Unit~$1.49-2.50/lb
IngredientsBone meal
OrganicYes — OMRI Listed
App. RatePer package directions
CoverageNot listed
Best ForBulbs, tomatoes, roses, flowering plants
ClaimsPrilled granular (low dust); spreader compatible; OMRI listed; best value pricing
Best value in category. Unique prilled form. 3K+/month sales. But only 4 lb size.
FoxFarm Happy Frog Steamed Bone Meal 3-12-0
by FoxFarm
— Arcata, CA
2000-03-12 00:00:00
N-P-K
FormFine-screened granular
Sizes4 lb
Price~$22-25 (4 lb)
Per Unit~$5.50-6.25/lb
IngredientsSteamed bone meal
OrganicYes — OMRI + CDFA Listed
App. Rate1-3 cups per plant depending on size
CoverageNot listed
Best ForBulbs, flowers, vegetables, transplants
ClaimsONLY bone meal with mycorrhizal fungi; fine-screened; OMRI + CDFA; premium quality
Premium-priced but unique mycorrhizae inclusion. Fine texture. But expensive and only 4 lb size.
True Organic Bone Meal 7-7-0
by True Organic
— Helmetta, NJ
2000-07-07 00:00:00
N-P-K
FormGranular
Sizes3 lb | 25 lb
Price~$9.97 (3 lb)
Per Unit~$3.32/lb
IngredientsBone meal
OrganicYes — OMRI + CDFA Listed
App. Rate1 lb per 20 sq ft
Coverage61 sq ft per 3 lb bag
Best ForFlowering, fruiting, root development
ClaimsUnique balanced 7-7-0 NPK; 7% calcium; exceeds clean sourcing requirements; highest rating (4.7★)
Category outlier with balanced N:P ratio. Highest star rating. But low review volume and unusual NPK may confuse buyers.
Earth Science Natural Bone Meal 2-17-0
by Earth Science
— USA
2000-02-17 00:00:00
N-P-K
FormGranular
Sizes3 lb | 4 lb
Price~$8-12 (3 lb)
Per Unit~$2.67-3.00/lb
IngredientsBone meal
OrganicNot confirmed
App. RatePer package directions
CoverageNot listed
Best ForFlowers, vegetables, trees, shrubs
ClaimsHighest phosphorus (17%); small business; value-priced
Highest P claim in category. Value pricing. But very few reviews and newer brand.
Espoma Organic Bone Meal 4-12-0
by Espoma
— Millville, NJ
2000-04-12 0:00:00
N-P-K
FormPowder
Sizes4 lb | 10 lb | 24 lb
Price~$10.52 (4 lb) / ~$20 (10 lb) / ~$50.84 (24 lb)
Per Unit~$2.00-2.63/lb
Ingredients100% all natural domestic bone meal
OrganicOMRI registered organic input
App. Rate10 lbs per 100 sq ft; 1 tsp per bulb
CoverageNot listed
Best ForBulbs, flowering plants, root crops
ClaimsMarket leader; 7K+/month sales; since 1929; safe for people, pets & planet; solar-powered mfg
Dominant category leader by volume and reviews (9,900+). But powder form can be messy.
Down To Earth Organic Bone Meal 3-15-0
by Down To Earth
— Eugene, OR
2000-03-15 0:00:00
N-P-K
FormGranular powder
Sizes5 lb | 25 lb | 40 lb
Price~$16-20 (5 lb) / ~$45-55 (25 lb)
Per Unit~$1.80-2.20/lb (25 lb)
IngredientsSteamed bone meal
OrganicYes — OMRI + CDFA Listed
App. Rate1-3 lbs per 100 sq ft; 1-2 tbsp per transplant hole
CoverageNot listed
Best ForBulbs, transplants, flowering plants, root crops
ClaimsHighest P (15%) + highest Ca (18%); OMRI + CDFA; no fillers; Transparency verified
Best guaranteed analysis in category. Dual cert. But premium pricing.
Burpee Natural Organic Bone Meal 6-8-0
by Burpee
— Warminster, PA
2000-06-08 0:00:00
N-P-K
FormFine granular
Sizes3 lb
Price~$9-12 (3 lb)
Per Unit~$3.00-4.00/lb
IngredientsBone meal
OrganicYes — OMRI Listed
App. RatePer package directions
CoverageNot listed
Best ForTomatoes, peppers, bulbs
ClaimsSince 1876; OMRI listed; deters rabbits; highest N in bone meal (6%)
Unusual 6-8-0 NPK — high N, low P vs competitors. Rabbit deterrent claim. But only 3 lb size.
Jobe's Organics Granular Bone Meal 2-14-0
by Jobe's Organics
— USA
2000-02-14 0:00:00
N-P-K
FormPrilled granular (low dust)
Sizes4 lb
Price~$5.96-9.99 (4 lb)
Per Unit~$1.49-2.50/lb
IngredientsBone meal
OrganicYes — OMRI Listed
App. RatePer package directions
CoverageNot listed
Best ForBulbs, tomatoes, roses, flowering plants
ClaimsPrilled granular (low dust); spreader compatible; OMRI listed; best value pricing
Best value in category. Unique prilled form. 3K+/month sales. But only 4 lb size.
FoxFarm Happy Frog Steamed Bone Meal 3-12-0
by FoxFarm
— Arcata, CA
2000-03-12 0:00:00
N-P-K
FormFine-screened granular
Sizes4 lb
Price~$22-25 (4 lb)
Per Unit~$5.50-6.25/lb
IngredientsSteamed bone meal
OrganicYes — OMRI + CDFA Listed
App. Rate1-3 cups per plant depending on size
CoverageNot listed
Best ForBulbs, flowers, vegetables, transplants
ClaimsONLY bone meal with mycorrhizal fungi; fine-screened; OMRI + CDFA; premium quality
Premium-priced but unique mycorrhizae inclusion. Fine texture. But expensive and only 4 lb size.
True Organic Bone Meal 7-7-0
by True Organic
— Helmetta, NJ
2000-07-07 0:00:00
N-P-K
FormGranular
Sizes3 lb | 25 lb
Price~$9.97 (3 lb)
Per Unit~$3.32/lb
IngredientsBone meal
OrganicYes — OMRI + CDFA Listed
App. Rate1 lb per 20 sq ft
Coverage61 sq ft per 3 lb bag
Best ForFlowering, fruiting, root development
ClaimsUnique balanced 7-7-0 NPK; 7% calcium; exceeds clean sourcing requirements; highest rating (4.7★)
Category outlier with balanced N:P ratio. Highest star rating. But low review volume and unusual NPK may confuse buyers.
Earth Science Natural Bone Meal 2-17-0
by Earth Science
— USA
2000-02-17 0:00:00
N-P-K
FormGranular
Sizes3 lb | 4 lb
Price~$8-12 (3 lb)
Per Unit~$2.67-3.00/lb
IngredientsBone meal
OrganicNot confirmed
App. RatePer package directions
CoverageNot listed
Best ForFlowers, vegetables, trees, shrubs
ClaimsHighest phosphorus (17%); small business; value-priced
Highest P claim in category. Value pricing. But very few reviews and newer brand.
Organic Bone Meal Fertilizer
by Espoma
4-12-2000
N-P-K
Price$13 / 4 lb; $18–$22 / 10 lb
DTE and Greenway Biotech both match the 3-15-0 NPK exactly. Espoma is the market leader by distribution. NPK varies widely across brands (from Burpee's 6-8-0 to DTE's 3-15-0), reflecting different processing methods.
Organic Bone Meal
by Down To Earth
3-15-2000
N-P-K
Price$13–$16 / 5 lb
DTE and Greenway Biotech both match the 3-15-0 NPK exactly. Espoma is the market leader by distribution. NPK varies widely across brands (from Burpee's 6-8-0 to DTE's 3-15-0), reflecting different processing methods.
Granular Bone Meal Fertilizer
by Jobe's Organics
2-14-2000
N-P-K
Price$8–$12 / 4 lb
DTE and Greenway Biotech both match the 3-15-0 NPK exactly. Espoma is the market leader by distribution. NPK varies widely across brands (from Burpee's 6-8-0 to DTE's 3-15-0), reflecting different processing methods.
Natural & Organic Bone Meal
by Burpee
6-8-2000
N-P-K
Price$8–$12 / 3 lb
DTE and Greenway Biotech both match the 3-15-0 NPK exactly. Espoma is the market leader by distribution. NPK varies widely across brands (from Burpee's 6-8-0 to DTE's 3-15-0), reflecting different processing methods.
Organic Bone Meal Fertilizer
by Greenway Biotech
3-15-2000
N-P-K
Price$15–$25 / 5 lb
DTE and Greenway Biotech both match the 3-15-0 NPK exactly. Espoma is the market leader by distribution. NPK varies widely across brands (from Burpee's 6-8-0 to DTE's 3-15-0), reflecting different processing methods.
Happy Frog Steamed Bone Meal Fertilizer
by FoxFarm
3-12-2000
N-P-K
Price$15–$20 / 4 lb
DTE and Greenway Biotech both match the 3-15-0 NPK exactly. Espoma is the market leader by distribution. NPK varies widely across brands (from Burpee's 6-8-0 to DTE's 3-15-0), reflecting different processing methods.
Bone Meal
by True Organic
7-7-2000
N-P-K
Price$10–$14 / 3 lb
DTE and Greenway Biotech both match the 3-15-0 NPK exactly. Espoma is the market leader by distribution. NPK varies widely across brands (from Burpee's 6-8-0 to DTE's 3-15-0), reflecting different processing methods.
Bone Meal
by Down To Earth
3-15-2000
N-P-K
Sizes0.5, 5, 15, 25, 40, 50 lb
Price$8 (5 lb), $22 (25 lb)
IngredientsSteamed bone meal; 18% calcium
OrganicOMRI, CDFA OIM
Bone Meal
by Espoma
4-12-2000
N-P-K
Sizes4, 8, 10, 24 lb
Price$8 (4 lb), $14 (10 lb)
Ingredients100% domestic bone meal; phosphorus + calcium
OrganicOIM Registered
Bone Meal Granular
by Jobe's Organics
2-14-2000
N-P-K
Sizes4 lb
Price$8-12 (4 lb)
IngredientsSteamed bone meal; granular format to reduce runoff
OrganicOMRI Listed
Bone Meal Fertilizer
by Burpee
6-8-2000
N-P-K
Sizes3 lb
Price$8-11 (3 lb)
IngredientsGround bone meal; added nitrogen, phosphorus, calcium
OrganicOMRI Listed
Bone Meal 3-15-0
by Greenway Biotech
3-15-2000
N-P-K
Sizes5, 10, 25, 50 lb
Price$15 (5 lb), $35 (25 lb)
IngredientsBovine bone meal; 24% calcium; non-GMO sourced
OrganicOrganic (repackaged OMRI)
Fish Bone Meal
by Down To Earth
4-12-2000
N-P-K
Sizes5, 25, 50 lb
Price$13 (5 lb)
IngredientsMarine fish bone meal; marine-source phosphorus + calcium
OrganicOMRI, CDFA OIM
Bone Meal
by True Organic
7-7-2000
N-P-K
Sizes3 lb
Price$8-10 (3 lb)
IngredientsBone meal blend; balanced nitrogen and phosphorus
OrganicOMRI Listed
Bone Meal Plant Food
by Earth Science
3-15-2000
N-P-K
Sizes3 lb
Price$7-10 (3 lb)
IngredientsGround bone meal; slow-release phosphorus and calcium
OrganicAll-natural (check OMRI)
Bone Meal
by Back to the Roots
3-15-2000
N-P-K
Sizes3 lb
Price$10-14 (3 lb)
IngredientsPremium bone meal; slow-release phosphorus, calcium, nitrogen
OrganicOMRI Listed
Peace of Mind Bone Meal
by FoxFarm
3-15-2000
N-P-K
Sizes4 lb
Price$12-16 (4 lb)
IngredientsSteamed bone meal; sustainably sourced
OrganicOMRI Listed
15% Slow-Release Phosphorus
Phosphorus from bone meal releases through soil microbial activity — not water solubility. This means steady, sustained feeding that lasts weeks longer than synthetic phosphorus sources.
24% Calcium Built In
Bone is primarily calcium phosphate. Every application delivers 24% calcium that prevents blossom end rot in tomatoes and peppers, strengthens cell walls, and improves fruit quality.
Root Development Powerhouse
The go-to organic amendment for transplant establishment, bulb planting, and new tree installations. Phosphorus in the root zone drives immediate root extension and anchorage.
Bloom Booster for Organic Gardens
Roses, perennials, and flowering shrubs respond to bone meal with increased flower bud formation and larger, more vibrant blooms. The organic alternative to synthetic bloom boosters.
Common Questions
