Organic Asparagus Specialist

Best Organic Asparagus Fertilizer (4-6-4): Pre-Emergence & Post-Harvest Feeding for Maximum Spear Production Year After Year Buy on Old Cobblers Farm

Updated April 2026 By the Old Cobblers Farm Team

Old Cobblers Farm™ Wicked Organics Organic Asparagus Fertilizer

by Wicked Organics — Littleton, NH

4-6-4
N-P-K Ratio
"The organic asparagus formula with a purpose-built 2-phase feeding program. Pre-emergence application fuels early spear production. Post-harvest application powers the fern growth that recharges crown energy reserves for next year's crop."
4-6-4
Organic NPK
2x
Pre-emergence + Post-harvest
333 ft²
Max Coverage / bag
4 Sizes
5, 10, 15, 20 lbs
🌿

2-Phase Asparagus Program

Phase 1: 2–3 lbs per 100 sq ft before spears emerge in spring. Phase 2: 1–2 lbs per 100 sq ft after the final harvest to fuel fern growth and crown recharge.

🌱

6% Phosphorus for Crown Health

Asparagus crowns are the perennial engine of the plant. 6% phosphorus supports root and crown development — the underground infrastructure that determines spear count and thickness.

⏳

Biologically-Driven Slow Release

Composted manure releases nutrients through soil biology — matching nutrient availability to soil temperature and plant growth rate. Nature-timed feeding.

🐔

Full-Spectrum Manure Nutrition

Beyond NPK, composted chicken manure delivers calcium, trace minerals, and beneficial microbes. Asparagus beds fed with organic matter develop richer, more biologically active soil over time.

📦

170–333 sq ft Per Bag

At the heavier pre-emergence rate, covers 170 sq ft. At the lighter post-harvest rate, stretches to 333 sq ft. Most home asparagus beds need just one bag per application.

📅

Perennial-Scale Investment

Asparagus beds produce for 15–20 years. Consistent organic feeding builds soil health over time — each year's application improves the bed for the next decade.

✅

All Asparagus Varieties

Jersey Knight, Jersey Giant, Mary Washington, Purple Passion, Millennium, UC 157 — every variety responds to organic feeding with thicker, more numerous spears.

🇺🇸

Trusted by 20,000+ Growers

Developed in Littleton, New Hampshire. Sold nationwide on Amazon, Walmart, eBay, and theoldcobblersfarm.com.

NPK Ratio4-6-4
Derived FromComposted chicken manure, Natural mineral phosphate sources, Natural potassium sources (NCO Pro-Holly base)
Item FormGranular
Release SpeedSlow-release (biologically driven)
Application Rate2–3 lbs / 100 sq ft (before spears emerge) | 1–2 lbs / 100 sq ft (post-harvest)
MethodBroadcast over asparagus bed
Frequency2x per season (pre-emergence spring + post-final-harvest)
Sizes5 lb | 10 lb | 15 lb | 20 lb
SupportsAll asparagus varieties — Jersey Knight, Jersey Giant, Mary Washington, Purple Passion, Millennium, UC 157
SetupsAsparagus beds, raised beds, asparagus trenches, field rows
What We Love
✓ Purpose-built 2-phase program for asparagus biology
✓ 6% phosphorus supports crown and root development
✓ Organic slow release builds soil health over 15–20 year bed life
✓ Full-spectrum composted manure nutrition
✓ Works for all asparagus varieties — new and established beds
Worth Noting
— Lower nitrogen than WG-ASPARAGUS 16-10-13 — for organic-only programs
— Does not provide the sulfur and magnesium of the Wicked Growth version
Buy on Old Cobblers Farm →
Available in 5 lb | 10 lb | 15 lb | 20 lb
Feature Old Cobblers Farm™ Wicked Organics Organic Asparagus Fertilizer Organic Asparagus Fertilizer Asparagus Alive! Fertilizer Mighty Spears Asparagus Mix Garden-tone Herb & Vegetable Food Home Grown Tomato, Vegetable & Herb Fertilizer All Purpose Granular Fertilizer Vegetable Garden 4-4-4 Organic Asparagus Fertilizer Mighty Spears Asparagus Mix Asparagus Food Home Grown Tomato, Veg & Herb 4-6-4 Natural & Organic Plant Food All Purpose Mix Vegetable Garden Garden-Tone Vegetable & Tomato Tomato & Vegetable Food
NPK 4-6-4 4-3-2001 N/A (slow-release) N/A (organic blend) 3-4-2004 4-6-2003 4-4-2004 4-4-2004 4-3-2001 2.3-6.6-7 4-6-2003 4-6-2004 4-6-2002 4-4-2004 3-4-2004 2-5-2003 4-5-2006
Phosphorus 6.0% 3.0% 0.0% 0.0% 4.0% 6.0% 4.0% 4.0% 3.0% 6.6% 0.0% 6.0% 6.0% 6.0% 4.0% 4.0% 5.0% 5.0%
Potassium 4.0% 1.0% 0.0% 0.0% 4.0% 3.0% 4.0% 4.0% 1.0% 7.0% 0.0% 3.0% 4.0% 2.0% 4.0% 4.0% 3.0% 6.0%
Form Granular
Sizes 5 lb | 10 lb | 15 lb | 20 lb 3, 6, 12, 24 lb ~5, 10 lb 2 lb 1, 4, 12, 25 lb 5, 20, 50 lb 1, 5, 15, 25, 50 lb 1, 5, 15, 25 lb 4, 8, 18, 36 lb 4, 16 lb 4, 8, 12, 25 lb
Release Speed Slow-release (biologically driven)
The Competition

Organic Asparagus Fertilizer

by Urban Farmer
4-3-2001
N-P-K
Price$12–$15 / 3 lb
This is an **extremely niche category**. Only 3 products (Urban Farmer, Gurney's, Fedco) are truly asparagus-specific, and all have very limited direct-only distribution. No major brand offers an asparagus-specific product, representing a significant market gap that Wicked Organics fills.

Asparagus Alive! Fertilizer

by Gurney's
N/A (slow-release)
N-P-K
Price$12.99 / 3 lb
This is an **extremely niche category**. Only 3 products (Urban Farmer, Gurney's, Fedco) are truly asparagus-specific, and all have very limited direct-only distribution. No major brand offers an asparagus-specific product, representing a significant market gap that Wicked Organics fills.

Mighty Spears Asparagus Mix

by Fedco Seeds
N/A (organic blend)
N-P-K
Price~$15–$25 / small bag
This is an **extremely niche category**. Only 3 products (Urban Farmer, Gurney's, Fedco) are truly asparagus-specific, and all have very limited direct-only distribution. No major brand offers an asparagus-specific product, representing a significant market gap that Wicked Organics fills.

Garden-tone Herb & Vegetable Food

by Espoma
3-4-2004
N-P-K
Price$9–$11 / 4 lb; $15–$16 / 8 lb
This is an **extremely niche category**. Only 3 products (Urban Farmer, Gurney's, Fedco) are truly asparagus-specific, and all have very limited direct-only distribution. No major brand offers an asparagus-specific product, representing a significant market gap that Wicked Organics fills.

Home Grown Tomato, Vegetable & Herb Fertilizer

by Dr. Earth
4-6-2003
N-P-K
Price$9–$13 / 4 lb
This is an **extremely niche category**. Only 3 products (Urban Farmer, Gurney's, Fedco) are truly asparagus-specific, and all have very limited direct-only distribution. No major brand offers an asparagus-specific product, representing a significant market gap that Wicked Organics fills.

All Purpose Granular Fertilizer

by Jobe's Organics
4-4-2004
N-P-K
Price$8–$11 / 4 lb
This is an **extremely niche category**. Only 3 products (Urban Farmer, Gurney's, Fedco) are truly asparagus-specific, and all have very limited direct-only distribution. No major brand offers an asparagus-specific product, representing a significant market gap that Wicked Organics fills.

Vegetable Garden 4-4-4

by Down To Earth
4-4-2004
N-P-K
Price$14–$17 / 5 lb
This is an **extremely niche category**. Only 3 products (Urban Farmer, Gurney's, Fedco) are truly asparagus-specific, and all have very limited direct-only distribution. No major brand offers an asparagus-specific product, representing a significant market gap that Wicked Organics fills.

Organic Asparagus Fertilizer

by Urban Farmer
4-3-2001
N-P-K
Sizes3, 6, 12, 24 lb
Price~$12-15 (3 lb)
IngredientsAlfalfa meal, gypsum, fish bone meal, blood meal, feather meal, sulfate of potash
OrganicNo OMRI

Mighty Spears Asparagus Mix

by Fedco Seeds
2.3-6.6-7
N-P-K
Sizes~5, 10 lb
Price~$10-20
IngredientsBone char, alfalfa meal, sulfate of potash, wollastonite, non-GMO soybean meal, compost
OrganicMOFGA approved

Asparagus Food

by Gurney's
N-P-K
Sizes2 lb
Price$9.99 (2 lb)
IngredientsAlfalfa meal, kelp meal, molasses, humic acid
OrganicAll-natural

Home Grown Tomato, Veg & Herb

by Dr. Earth
4-6-2003
N-P-K
Sizes1, 4, 12, 25 lb
Price~$9 (4 lb)
IngredientsFish bone meal, alfalfa meal, feather meal, potassium sulfate; TruBiotic + mycorrhizae
OrganicOMRI, CCOF, NOP

4-6-4 Natural & Organic Plant Food

by Sustane
4-6-2004
N-P-K
Sizes5, 20, 50 lb
Price~$15-20 (5 lb)
IngredientsComposted turkey litter, feather meal, bone meal, sulfate of potash
OrganicOMRI Listed

All Purpose Mix

by Down To Earth
4-6-2002
N-P-K
Sizes1, 5, 15, 25, 50 lb
Price~$7-9 (5 lb)
IngredientsFish bone meal, blood meal, feather meal, alfalfa meal, rock phosphate, langbeinite, humates, kelp
OrganicOMRI, CDFA

Vegetable Garden

by Down To Earth
4-4-2004
N-P-K
Sizes1, 5, 15, 25 lb
Price~$7-9 (5 lb)
IngredientsFish bone meal, alfalfa meal, feather meal, langbeinite, basalt, potassium sulfate, dolomite, kelp
OrganicOMRI, CDFA

Garden-Tone

by Espoma
3-4-2004
N-P-K
Sizes4, 8, 18, 36 lb
Price~$7.69 (4 lb)
IngredientsFeather meal, poultry manure, bone meal, alfalfa meal, greensand, sulfate of potash; Bio-tone
OrganicOIM Registered

Vegetable & Tomato

by Jobe's Organics
2-5-2003
N-P-K
Sizes4, 16 lb
Price~$7 (4 lb)
IngredientsBone meal, feather meal, processed manure, sulfate of potash; Biozome
OrganicOMRI Listed

Tomato & Vegetable Food

by True Organic
4-5-2006
N-P-K
Sizes4, 8, 12, 25 lb
Price~$9-11 (4 lb)
IngredientsPoultry manure, seabird guano, fish bone meal, soybean meal, sulfate of potash, crab/shrimp shell
OrganicOMRI, CDFA

🌿

2-Phase Asparagus Program

Phase 1: 2–3 lbs per 100 sq ft before spears emerge in spring. Phase 2: 1–2 lbs per 100 sq ft after the final harvest to fuel fern growth and crown recharge.

🌱

6% Phosphorus for Crown Health

Asparagus crowns are the perennial engine of the plant. 6% phosphorus supports root and crown development — the underground infrastructure that determines spear count and thickness.

⏳

Biologically-Driven Slow Release

Composted manure releases nutrients through soil biology — matching nutrient availability to soil temperature and plant growth rate. Nature-timed feeding.

🐔

Full-Spectrum Manure Nutrition

Beyond NPK, composted chicken manure delivers calcium, trace minerals, and beneficial microbes. Asparagus beds fed with organic matter develop richer, more biologically active soil over time.

Common Questions