60+ Trace Minerals + Plant Hormones
Best Organic Kelp Meal (1-0.1-2): 60+ Trace Minerals & Natural Growth Hormones for Stress Resistance, Root Growth & Overall Plant Health Buy on Old Cobblers Farm
Old Cobblers Farm™ Wicked Organics Kelp Meal
by Wicked Organics — Littleton, NH
1-0.1-2
N-P-K Ratio
"The organic multivitamin for plants. Kelp meal from Ascophyllum nodosum delivers 60+ trace minerals, natural plant growth hormones, and soil-feeding compounds that improve stress tolerance, root growth, and overall plant health in ways NPK alone never can."
60+
Trace Minerals
1-0.1-2
NPK Ratio
500 ft²
Max Coverage / bag
4 Sizes
5, 10, 15, 20 lbs
60+ Trace Minerals from the Ocean
Seaweed concentrates every trace element from ocean water — iron, manganese, zinc, boron, molybdenum, copper, and dozens more. A single amendment that covers the entire micronutrient spectrum.
Natural Growth Hormones
Contains cytokinins and auxins — natural plant hormones that promote cell division, root initiation, and stress recovery. These compounds are why kelp-treated plants consistently outperform.
Stress Resistance Booster
Kelp-treated plants show improved tolerance to drought, frost, heat, disease, and transplant shock. The natural hormone and mineral package primes plant defense systems.
Root Growth Promoter
Auxins in kelp meal directly stimulate root initiation and branching. Add to seed starting mixes, transplant holes, and new plantings for measurably better root establishment.
Feeds Soil Biology
Complex carbohydrates and alginic acid in kelp meal feed beneficial soil microbes, improving nutrient cycling, soil structure, and disease suppression in the root zone.
250–500 sq ft Per Bag
At 1–2 lbs per 100 sq ft, one 5 lb bag covers 250–500 sq ft. Low application rates make kelp meal economical despite its premium-ingredient status.
Universal Amendment
There is no plant that doesn't benefit from kelp meal. Vegetables, flowers, trees, shrubs, lawns, houseplants, seed starting — add it everywhere, every season.
Trusted by 20,000+ Growers
Developed in Littleton, New Hampshire. Sold nationwide on Amazon, Walmart, eBay, and theoldcobblersfarm.com.
| NPK Ratio | 1-0.1-2 |
| Derived From | Dried Ascophyllum nodosum seaweed (100%) |
| Item Form | Granular meal |
| Release Speed | Slow-release |
| Application Rate | 1–2 lbs / 100 sq ft (beds) | 1–2 tsp / planting hole |
| Method | Mix into soil, top-dress, or add to potting mix |
| Frequency | 2–4x per season (spring + monthly through growing season) |
| Sizes | 5 lb | 10 lb | 15 lb | 20 lb |
| Supports | All plants — vegetables, flowers, trees, shrubs, lawns, houseplants, seedlings |
| Setups | Garden beds, raised beds, containers, seed starting, compost tea, lawns, orchards |
What We Love
✓ 60+ trace minerals covering the entire micronutrient spectrum
✓ Natural cytokinins and auxins for root growth and stress resistance
✓ Universal — benefits every plant type in every setting
✓ Feeds soil biology with complex carbohydrates and alginic acid
✓ Organic approved — sustainably harvested Ascophyllum nodosum
Worth Noting
— Very low NPK — not a primary fertilizer, use as a supplement
— Premium ingredient — higher cost per bag than basic amendments
Buy on Old Cobblers Farm →
Available in 5 lb | 10 lb | 15 lb | 20 lb
| Feature | Old Cobblers Farm™ Wicked Organics Kelp Meal | Down To Earth Organic Kelp Meal 1-0.1-2 | Neptune's Harvest Seaweed Plant Food 0-0-1 (Liquid) | Espoma Organic Kelp Meal 1-0-2 | Maxicrop Kelp Meal 5000 | Plantonix Kelp Bliss Organic Kelp Meal | Acadian Kelp Meal (Professional Grade) | Fertrell Kelp Meal | Down To Earth Organic Kelp Meal 1-0.1-2 | Neptune's Harvest Seaweed Plant Food 0-0-1 (Liquid) | Espoma Organic Kelp Meal 1-0-2 | Maxicrop Kelp Meal 5000 | Plantonix Kelp Bliss Organic Kelp Meal | Acadian Kelp Meal (Professional Grade) | Fertrell Kelp Meal | Organic Kelp Meal | Organic Kelp Meal | Organic Kelp Meal | Kelp Meal Organic Plant Food | Premium Organic Kelp Meal | Organic Kelp Meal Fertilizer | Kelp Bliss Kelp Meal | Kelp Meal | Organic Kelp Meal | Organic Kelp Meal | Kelp Fertilizer Boost | Organic Kelp Meal | Bush Doctor Kelp | Organic Kelp Meal | Organic Kelp Meal | Stonington Kelp Meal | Kelp Meal Fertilizer |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NPK | 1-0.1-2 | 1-0.1-2 | 0-0-1 | 1-0-2 | Not listed | Not listed | Not listed | Not listed | 1-0.1-2 | 0-0-1 | 1-0-2 | Not listed | Not listed | Not listed | Not listed | 1-0.1-2 | 1-0-2 | 1-0-2 | 1-0-1 | 1-0.5-2 | 2-0-4 | N/A (soil amendment) | 1-0.1-2 | 1-0-2 | 1-0.1-2 | Liquid | 1-0-2 | Liquid | 1-0-2 | 1-0-2 | 1-0-1 | 1-0-2 |
| Phosphorus | 0.1% | 0.1% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.1% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.1% | 0.0% | 0.0% | 0.0% | 0.5% | 0.0% | 0.0% | 0.1% | 0.0% | 0.1% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
| Potassium | 2.0% | 2.0% | 1.0% | 2.0% | 0.0% | 0.0% | 0.0% | 0.0% | 2.0% | 1.0% | 2.0% | 0.0% | 0.0% | 0.0% | 0.0% | 2.0% | 2.0% | 2.0% | 1.0% | 2.0% | 4.0% | 0.0% | 2.0% | 2.0% | 2.0% | 0.0% | 2.0% | 0.0% | 2.0% | 2.0% | 1.0% | 2.0% |
| Form | Granular meal | Meal/powder | Liquid concentrate | Meal/granular | Granular/meal | Meal/powder | Meal/granular | Meal | Meal/powder | Liquid concentrate | Meal/granular | Granular/meal | Meal/powder | Meal/granular | Meal | |||||||||||||||||
| Sizes | 5 lb | 10 lb | 15 lb | 20 lb | 0.5 lb | 4 lb | 5 lb | 25 lb | 50 lb | 18 oz | 1 qt | 1 gal | 4 lb | 5 lb | 20 lb | 1 lb | 2.5 lb | 5 lb | 10 lb | Bulk (25-50 lb+) | 5 lb | 10 lb | 50 lb | 0.5 lb | 4 lb | 5 lb | 25 lb | 50 lb | 18 oz | 1 qt | 1 gal | 4 lb | 5 lb | 20 lb | 1 lb | 2.5 lb | 5 lb | 10 lb | Bulk (25-50 lb+) | 5 lb | 10 lb | 50 lb | 5 lb, 20 lb | 4 lb | 0.5 lb, 4 lb | 32 oz | 4 lb, 12 lb | 16 oz | 2 lb | 50 lb | 4 lb | 2 lb | |||||||
| Release Speed | Slow-release | Slow-moderate (weeks-months) | Fast (immediate when diluted) | Slow-moderate | Slow-moderate | Slow-moderate | Slow-moderate | Slow-moderate | Slow-moderate (weeks-months) | Fast (immediate when diluted) | Slow-moderate | Slow-moderate | Slow-moderate | Slow-moderate | Slow-moderate |
The Competition
Down To Earth Organic Kelp Meal 1-0.1-2
by Down To Earth
— Eugene, OR
1-0.1-2
N-P-K
FormMeal/powder
Sizes0.5 lb | 4 lb | 5 lb | 25 lb | 50 lb
Price~$14-18 (4 lb) / ~$40-50 (25 lb)
Per Unit~$1.60-2.00/lb (25 lb)
IngredientsAscophyllum nodosum (North Atlantic seaweed)
OrganicYes — OMRI + CDFA Listed
App. Rate1-2 lbs per 100 sq ft; 1-2 tbsp per gallon potting mix
CoverageNot listed
Best ForAll gardens, lawns, containers, compost
ClaimsOMRI + CDFA; Ascophyllum nodosum; potassium and trace minerals; no fillers
Category leader in dry kelp meal. Dual cert. Wide size range. Benchmark product.
Neptune's Harvest Seaweed Plant Food 0-0-1 (Liquid)
by Neptune's Harvest
— Gloucester, MA
0-0-1
N-P-K
FormLiquid concentrate
Sizes18 oz | 1 qt | 1 gal
Price~$13-16 (1 qt) / ~$30-40 (1 gal)
Per Unit~$0.41-0.50/fl oz (1 qt)
IngredientsAscophyllum nodosum (cold-processed, hydrolyzed)
OrganicOMRI Listed
App. Rate1 oz per gallon (soil drench); 1 tbsp per gallon (foliar)
CoverageNot listed
Best ForAll plants, stress treatment, foliar feeding
ClaimsCold-processed; hydrolyzed (preserves growth hormones); Made in USA (Gloucester, MA); liquid form
Liquid category leader. Cold-processed = premium. MA-based (near OCF). But liquid form, not dry meal.
Espoma Organic Kelp Meal 1-0-2
by Espoma
— Millville, NJ
1-0-2
N-P-K
FormMeal/granular
Sizes4 lb
Price~$12-16 (4 lb)
Per Unit~$3.00-4.00/lb
IngredientsAscophyllum nodosum
OrganicOMRI registered
App. RatePer package directions
CoverageNot listed
Best ForAll gardens, lawns
ClaimsSince 1929; long-lasting slow-release; OMRI listed
Legacy brand recognition. But only 4 lb size and limited kelp-specific marketing.
Maxicrop Kelp Meal 5000
by Maxicrop
— USA/UK
Not listed
N-P-K
FormGranular/meal
Sizes5 lb | 20 lb
Price~$20-26 (5 lb)
Per Unit~$4.00-5.20/lb
IngredientsAscophyllum nodosum
OrganicOrganic-approved
App. Rate2-5 lbs per 100 sq ft
CoverageNot listed
Best ForAll gardens, orchards, farms
ClaimsBritish heritage brand; widely respected in organic farming; alginic acid content
Respected brand in professional organic circles. But premium priced and limited consumer awareness.
Plantonix Kelp Bliss Organic Kelp Meal
by Plantonix
— USA
Not listed
N-P-K
FormMeal/powder
Sizes1 lb | 2.5 lb | 5 lb | 10 lb
Price~$8-10 (1 lb) / ~$25-32 (10 lb)
Per Unit~$2.50-3.20/lb (10 lb)
IngredientsKelp (seaweed)
OrganicOMRI Listed
App. Rate1-2 tbsp per gallon of soil
CoverageNot listed
Best ForIndoor plants, containers, gardens
ClaimsOMRI listed; indoor plant focus; resealable packaging; small sizes available
Popular with indoor plant community. Good small-size options. But limited bulk availability.
Acadian Kelp Meal (Professional Grade)
by Acadian Seaplants
— Dartmouth, NS, Canada
Not listed
N-P-K
FormMeal/granular
SizesBulk (25-50 lb+)
PriceWholesale pricing
Per Unit~$1.50-2.50/lb bulk
IngredientsAscophyllum nodosum (Canadian-harvested, proprietary processing)
OrganicOMRI Listed (select products)
App. Rate2-5 lbs per 100 sq ft
CoverageNot listed
Best ForCommercial farms, professional growers
ClaimsWorld leader in Ascophyllum nodosum; proprietary sustainable harvesting; scientific research backing
Global leader in A. nodosum science. But professional/wholesale only — not consumer retail.
Fertrell Kelp Meal
by Fertrell
— Bainbridge, PA
Not listed
N-P-K
FormMeal
Sizes5 lb | 10 lb | 50 lb
Price~$25-30 (10 lb)
Per Unit~$2.50-3.00/lb
IngredientsAscophyllum nodosum
OrganicOrganic-approved
App. Rate2-5 lbs per 100 sq ft
CoverageNot listed
Best ForFarms, gardens, livestock feed supplement
ClaimsEstablished organic farm supply brand; dual-use (garden + livestock); PA-based
Respected in organic farming. Dual garden/feed use. But limited consumer Amazon presence.
Down To Earth Organic Kelp Meal 1-0.1-2
by Down To Earth
— Eugene, OR
1-0.1-2
N-P-K
FormMeal/powder
Sizes0.5 lb | 4 lb | 5 lb | 25 lb | 50 lb
Price~$14-18 (4 lb) / ~$40-50 (25 lb)
Per Unit~$1.60-2.00/lb (25 lb)
IngredientsAscophyllum nodosum (North Atlantic seaweed)
OrganicYes — OMRI + CDFA Listed
App. Rate1-2 lbs per 100 sq ft; 1-2 tbsp per gallon potting mix
CoverageNot listed
Best ForAll gardens, lawns, containers, compost
ClaimsOMRI + CDFA; Ascophyllum nodosum; potassium and trace minerals; no fillers
Category leader in dry kelp meal. Dual cert. Wide size range. Benchmark product.
Neptune's Harvest Seaweed Plant Food 0-0-1 (Liquid)
by Neptune's Harvest
— Gloucester, MA
0-0-1
N-P-K
FormLiquid concentrate
Sizes18 oz | 1 qt | 1 gal
Price~$13-16 (1 qt) / ~$30-40 (1 gal)
Per Unit~$0.41-0.50/fl oz (1 qt)
IngredientsAscophyllum nodosum (cold-processed, hydrolyzed)
OrganicOMRI Listed
App. Rate1 oz per gallon (soil drench); 1 tbsp per gallon (foliar)
CoverageNot listed
Best ForAll plants, stress treatment, foliar feeding
ClaimsCold-processed; hydrolyzed (preserves growth hormones); Made in USA (Gloucester, MA); liquid form
Liquid category leader. Cold-processed = premium. MA-based (near OCF). But liquid form, not dry meal.
Espoma Organic Kelp Meal 1-0-2
by Espoma
— Millville, NJ
1-0-2
N-P-K
FormMeal/granular
Sizes4 lb
Price~$12-16 (4 lb)
Per Unit~$3.00-4.00/lb
IngredientsAscophyllum nodosum
OrganicOMRI registered
App. RatePer package directions
CoverageNot listed
Best ForAll gardens, lawns
ClaimsSince 1929; long-lasting slow-release; OMRI listed
Legacy brand recognition. But only 4 lb size and limited kelp-specific marketing.
Maxicrop Kelp Meal 5000
by Maxicrop
— USA/UK
Not listed
N-P-K
FormGranular/meal
Sizes5 lb | 20 lb
Price~$20-26 (5 lb)
Per Unit~$4.00-5.20/lb
IngredientsAscophyllum nodosum
OrganicOrganic-approved
App. Rate2-5 lbs per 100 sq ft
CoverageNot listed
Best ForAll gardens, orchards, farms
ClaimsBritish heritage brand; widely respected in organic farming; alginic acid content
Respected brand in professional organic circles. But premium priced and limited consumer awareness.
Plantonix Kelp Bliss Organic Kelp Meal
by Plantonix
— USA
Not listed
N-P-K
FormMeal/powder
Sizes1 lb | 2.5 lb | 5 lb | 10 lb
Price~$8-10 (1 lb) / ~$25-32 (10 lb)
Per Unit~$2.50-3.20/lb (10 lb)
IngredientsKelp (seaweed)
OrganicOMRI Listed
App. Rate1-2 tbsp per gallon of soil
CoverageNot listed
Best ForIndoor plants, containers, gardens
ClaimsOMRI listed; indoor plant focus; resealable packaging; small sizes available
Popular with indoor plant community. Good small-size options. But limited bulk availability.
Acadian Kelp Meal (Professional Grade)
by Acadian Seaplants
— Dartmouth, NS, Canada
Not listed
N-P-K
FormMeal/granular
SizesBulk (25-50 lb+)
PriceWholesale pricing
Per Unit~$1.50-2.50/lb bulk
IngredientsAscophyllum nodosum (Canadian-harvested, proprietary processing)
OrganicOMRI Listed (select products)
App. Rate2-5 lbs per 100 sq ft
CoverageNot listed
Best ForCommercial farms, professional growers
ClaimsWorld leader in Ascophyllum nodosum; proprietary sustainable harvesting; scientific research backing
Global leader in A. nodosum science. But professional/wholesale only — not consumer retail.
Fertrell Kelp Meal
by Fertrell
— Bainbridge, PA
Not listed
N-P-K
FormMeal
Sizes5 lb | 10 lb | 50 lb
Price~$25-30 (10 lb)
Per Unit~$2.50-3.00/lb
IngredientsAscophyllum nodosum
OrganicOrganic-approved
App. Rate2-5 lbs per 100 sq ft
CoverageNot listed
Best ForFarms, gardens, livestock feed supplement
ClaimsEstablished organic farm supply brand; dual-use (garden + livestock); PA-based
Respected in organic farming. Dual garden/feed use. But limited consumer Amazon presence.
Organic Kelp Meal
by Down To Earth
1-0.1-2
N-P-K
Price$15–$17 / 5 lb
**DTE Kelp Meal at 1-0.1-2 is the exact NPK match.** All products derive from Ascophyllum nodosum. Espoma is the most competitively priced at ~$13/4 lb with the widest big-box distribution. Greenway Biotech registers higher at 2-0-4 (different processing).
Organic Kelp Meal
by Neptune's Harvest
1-0-2
N-P-K
Price$15–$17 / 4 lb
**DTE Kelp Meal at 1-0.1-2 is the exact NPK match.** All products derive from Ascophyllum nodosum. Espoma is the most competitively priced at ~$13/4 lb with the widest big-box distribution. Greenway Biotech registers higher at 2-0-4 (different processing).
Organic Kelp Meal
by Espoma
1-0-2
N-P-K
Price$13–$15 / 4 lb
**DTE Kelp Meal at 1-0.1-2 is the exact NPK match.** All products derive from Ascophyllum nodosum. Espoma is the most competitively priced at ~$13/4 lb with the widest big-box distribution. Greenway Biotech registers higher at 2-0-4 (different processing).
Kelp Meal Organic Plant Food
by Coast of Maine
1-0-1
N-P-K
Price$13–$16 / 4 lb
**DTE Kelp Meal at 1-0.1-2 is the exact NPK match.** All products derive from Ascophyllum nodosum. Espoma is the most competitively priced at ~$13/4 lb with the widest big-box distribution. Greenway Biotech registers higher at 2-0-4 (different processing).
Premium Organic Kelp Meal
by Dr. Earth
1-0.5-2
N-P-K
Price$9–$12 / 2 lb
**DTE Kelp Meal at 1-0.1-2 is the exact NPK match.** All products derive from Ascophyllum nodosum. Espoma is the most competitively priced at ~$13/4 lb with the widest big-box distribution. Greenway Biotech registers higher at 2-0-4 (different processing).
Organic Kelp Meal Fertilizer
by Greenway Biotech
2-0-4
N-P-K
Price$20–$25 / 5 lb
**DTE Kelp Meal at 1-0.1-2 is the exact NPK match.** All products derive from Ascophyllum nodosum. Espoma is the most competitively priced at ~$13/4 lb with the widest big-box distribution. Greenway Biotech registers higher at 2-0-4 (different processing).
Kelp Bliss Kelp Meal
by Plantonix
N/A (soil amendment)
N-P-K
Price$12–$15 / 1 lb
**DTE Kelp Meal at 1-0.1-2 is the exact NPK match.** All products derive from Ascophyllum nodosum. Espoma is the most competitively priced at ~$13/4 lb with the widest big-box distribution. Greenway Biotech registers higher at 2-0-4 (different processing).
Kelp Meal
by Down To Earth
1-0.1-2
N-P-K
Sizes5 lb, 20 lb
Price$32.99
OrganicOMRI, CDFA
Organic Kelp Meal
by Espoma
1-0-2
N-P-K
Sizes4 lb
Price$33.72
OrganicNatural
Organic Kelp Meal
by Eartheasy
1-0.1-2
N-P-K
Sizes0.5 lb, 4 lb
Price$32.99
OrganicOMRI
Kelp Fertilizer Boost
by GS Plant Foods
Liquid
N-P-K
Sizes32 oz
Price$20.95
OrganicOMRI
Organic Kelp Meal
by Neptune's Harvest
1-0-2
N-P-K
Sizes4 lb, 12 lb
Price$34.13
OrganicOMRI
Bush Doctor Kelp
by FoxFarm
Liquid
N-P-K
Sizes16 oz
Price$22.95
OrganicOrganic
Organic Kelp Meal
by Whitney Farms
1-0-2
N-P-K
Sizes2 lb
Price$20.63
OrganicNatural
Organic Kelp Meal
by Thorvin
1-0-2
N-P-K
Sizes50 lb
Price$169.99
OrganicOrganic
Stonington Kelp Meal
by Coast of Maine
1-0-1
N-P-K
Sizes4 lb
Price$31.18
OrganicOrganic
Kelp Meal Fertilizer
by Icelandic Kelp
1-0-2
N-P-K
Sizes2 lb
Price$29.50
OrganicNatural
60+ Trace Minerals from the Ocean
Seaweed concentrates every trace element from ocean water — iron, manganese, zinc, boron, molybdenum, copper, and dozens more. A single amendment that covers the entire micronutrient spectrum.
Natural Growth Hormones
Contains cytokinins and auxins — natural plant hormones that promote cell division, root initiation, and stress recovery. These compounds are why kelp-treated plants consistently outperform.
Stress Resistance Booster
Kelp-treated plants show improved tolerance to drought, frost, heat, disease, and transplant shock. The natural hormone and mineral package primes plant defense systems.
Root Growth Promoter
Auxins in kelp meal directly stimulate root initiation and branching. Add to seed starting mixes, transplant holes, and new plantings for measurably better root establishment.
Common Questions
