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
Asparagus is a perennial that can produce for 15–20 years — but only if you feed the crown. This organic 4-6-4 provides the phosphorus for deep root development and the balanced nutrition that fuels the fern growth responsible for recharging crowns for next spring's harvest.
Old Cobblers Farm™ Wicked Organics Organic Asparagus Fertilizer
by Organic Fertilizer — 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 Ratio | 4-6-4 |
| Item Form | Granular |
| Coverage | 170–333 sq ft per 5 lb bag |
| Category | Organic Fertilizer |
| Type | Plant-Specific Organic |
| Sizes | 5 lb | 10 lb | 15 lb | 20 lb |
| NPK | 4-6-4 |
| Nitrogen | 4% |
| Phosphorus | 6% |
| Potassium | 4% |
| Base | NCO Pro-Holly |
| Form | Granular |
| Rate | 2–3 lbs / 100 sq ft (spring) + 1–2 lbs (post-harvest) |
| Method | Broadcast over bed |
| Frequency | 2x per season |
| Sizes | 5, 10, 15, 20 lb bags |
| Best For | All asparagus — Jersey Knight, Jersey Giant, Mary Washington, Purple Passion |
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 Old Cobblers Farm | Organic Asparagus Fertilizer Urban Farmer | Asparagus Alive! Fertilizer Gurney's | Mighty Spears Asparagus Mix Fedco Seeds | Garden-tone Herb & Vegetable Food Espoma | Home Grown Tomato, Vegetable & Herb Fertilizer Dr. Earth | All Purpose Granular Fertilizer Jobe's Organics | Vegetable Garden 4-4-4 Down To Earth | Organic Asparagus Fertilizer Urban Farmer | Mighty Spears Asparagus Mix Fedco Seeds | Asparagus Food Gurney's | Home Grown Tomato, Veg & Herb Dr. Earth | 4-6-4 Natural & Organic Plant Food Sustane | All Purpose Mix Down To Earth | Vegetable Garden Down To Earth | Garden-Tone Espoma | Vegetable & Tomato Jobe's Organics | Tomato & Vegetable Food True Organic |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NPK | 4-6-4 | 4-3-1 | N/A (slow-release) | N/A (organic blend) | 3-4-4 | 4-6-3 | 4-4-4 | 4-4-4 | 4-3-1 | 2.3-6.6-7 | 4-6-3 | 4-6-4 | 4-6-2 | 4-4-4 | 3-4-4 | 2-5-3 | 4-5-6 | |
| Form | Granular | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Coverage | 170–333 sq ft per 5 lb bag | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed |
| Price / Size | 5 lb | 10 lb | 15 lb | 20 lb | $12–$15 / 3 lb | $12.99 / 3 lb | ~$15–$25 / small bag | $9–$11 / 4 lb; $15–$16 / 8 lb | $9–$13 / 4 lb | $8–$11 / 4 lb | $14–$17 / 5 lb | ~$12-15 (3 lb) | ~$10-20 | $9.99 (2 lb) | ~$9 (4 lb) | ~$15-20 (5 lb) | ~$7-9 (5 lb) | ~$7-9 (5 lb) | ~$7.69 (4 lb) | ~$7 (4 lb) | ~$9-11 (4 lb) |
| Our Take | The organic asparagus formula with a purpose-built 2-phase feeding ... | 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. | 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. | 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. | 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. | 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. | 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. | 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. | — | — | — | — | — | — | — | — | — | — |
The Competition
Organic Asparagus Fertilizer
by Urban Farmer
4-3-1
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
3-4-4
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
4-6-3
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
4-4-4
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
4-4-4
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
4-3-1
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
4-6-3
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
4-6-4
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
4-6-2
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
4-4-4
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
3-4-4
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
2-5-3
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
4-5-6
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
