Organic Asparagus Fertilizer (4-6-4) is a natural fertilizer blended from mineral and organic ingredients, specially formulated for the unique long-term nutritional demands of perennial asparagus beds. Asparagus crowns remain productive in the ground for 15-20 years, making organic soil health the foundation of sustained yields — and t...
4.0% Total Nitrogen (1.5% Water Soluble, 2.5% Water Insoluble) — provides both immediate and slow-release nitrogen to fuel fern growth in established asparagus beds, which is critical for photosynthesis and crown energy storage for next spring's spear harvest.
P · Phosphorus
6%
6.0% Available Phosphate (P2O5) — supports the deep, fleshy root system that asparagus crowns depend on for 15-20 years of productive life, and promotes strong spear emergence each spring.
K · Potassium
4%
4.0% Soluble Potash (K2O) — strengthens cell walls, improves disease resistance including Fusarium wilt tolerance, enhances winter hardiness, and supports overall crown vigor in this long-lived perennial crop.
Derived from: Elemental Sulfur, Animal Protein Meals, Vegetable Protein Meals, Natural Sulfate of Potash, Natural Nitrate of Soda, Bone Char
Overview
What It Is
Wicked Organics Organic Asparagus Fertilizer is a 4-6-4 organic blend formulated from Elemental Sulfur, Animal Protein Meals, Vegetable Protein Meals, Natural Sulfate of Potash, Natural Nitrate of Soda, and Bone Char. This is the same proven formula used in the Wicked Organics Blueberry and Evergreen fertilizers — a blend specifically designed for plants with deep root systems and long productive lifespans.
The guaranteed analysis shows 4.0% Total Nitrogen (1.5% Water Soluble, 2.5% Water Insoluble), 6.0% Available Phosphate, and 4.0% Soluble Potash. The water-insoluble nitrogen releases slowly through microbial activity, matching the gradual nutrient uptake pattern of asparagus — a perennial that absorbs nutrients steadily over months rather than in rapid bursts.
Asparagus has two critical feeding windows: before spear emergence in spring, and after final harvest when the fern growth phase begins. The post-harvest application is arguably more important because fern growth is when the plant banks the carbohydrate energy that determines next year's spear quality and quantity. This organic formula's slow-release characteristics make it particularly well-suited for this purpose, providing sustained nutrition through the entire fern growth period.
Asparagus is the primary target — this formula addresses every nutritional requirement of this long-lived perennial crop including the phosphorus for deep root systems, nitrogen for fern production, and potassium for disease resistance and winter survival. Rhubarb shares asparagus's need for sustained organic nutrition in a permanent bed. Artichokes are heavy-feeding perennials that respond well to the balanced organic NPK. Horseradish benefits from the phosphorus for root development. Perennial herbs like oregano, thyme, and chives gain balanced nutrition that supports long-term crown health without excessive nitrogen that reduces flavor concentration.
Application Rates
How Much to Use
Garden & beds
2-3 lbs per 100 sq ft for established asparagus beds; 3-4 lbs per 100 sq ft for new bed preparation
Lawn
N/A — crop-specific fertilizer formulated for asparagus beds
Trees & shrubs
N/A — not formulated for tree application
Containers
N/A — asparagus is not typically container-grown
Frequency
Twice per year — early spring before spear emergence, and immediately after final harvest (late June/July) to support fern growth. If only one application, choose post-harvest.
Step by Step
How to Apply
1
Soil pH Test
Test soil pH — asparagus prefers 6.5–7.5. Adjust pH with lime (if low) before fertilizing.
2
New Bed Rate
For new beds, work 3–4 lbs per 100 sq ft into the top 6–8 inches before planting crowns.
3
Established Bed Rate
For established beds, broadcast 2–3 lbs per 100 sq ft in early spring before spears emerge.
4
Post-Harvest Application
Apply second application immediately after final harvest (late June/July) to support fern growth and root energy reserves.
5
Even Spread
Spread evenly over the entire bed surface for uniform nutrient distribution.
6
Water In
Water in after application to begin organic nutrient activation and microbial breakdown.
7
Dormancy Warning
Do not apply during fall or winter dormancy. Unused nutrients leach away and are wasted.
Asparagus nutrition revolves around two critical windows. In early spring, before the first spears emerge, broadcast 2-3 lbs per 100 sq ft evenly over the entire bed. The slow-release nitrogen will become available just as spear production creates heavy nutritional demand. After your last harvest (typically late June), apply a second feeding at the same rate — this post-harvest application is the most important of the year because it fuels the fern growth that creates and stores carbohydrates in the crown for next spring's crop. For new plantings, incorporate 3-4 lbs per 100 sq ft into the soil before setting crowns. Do not harvest spears during the first two years to allow crowns to establish. The organic slow-release nature of this fertilizer means nutrients remain available over weeks, reducing the need for frequent reapplication that synthetic programs require.
See It In Action
Watch
Handling & Timing
Safety & Season
Safety & Storage
Store in a dry environment. Natural product with no known hazards. Wear a dust mask if sensitive to fine particles. Wear gloves if skin sensitivities appear. Wash hands after use.
Seasonal Notes
Spring: Apply before spear emergence when soil becomes workable. Summer: Apply immediately after final harvest (late June/July) to fuel fern growth and crown energy storage — this is the most critical application. Fall: Do not apply. Allow ferns to naturally die back, then mow and mulch. Winter: No application. Plan soil testing for spring.
In Context
How It Compares
Compared to the synthetic Wicked Growth Asparagus Fertilizer (16-10-13), this organic 4-6-4 delivers lower immediate nutrient concentration but feeds the soil ecosystem for longer-lasting results and eliminates the salt buildup risk that comes with decades of synthetic application in permanent asparagus beds. The organic formula builds microbial populations that improve nutrient cycling, water retention, and disease suppression — outcomes that matter enormously in a crop that stays in the ground for 15-20 years. The 16-10-13 is the better choice for maximum immediate production; the 4-6-4 organic is the better choice for long-term bed health and organic certification.
Answers
Frequently Asked Questions
What is the best organic fertilizer for asparagus?
The best organic asparagus fertilizer provides elevated nitrogen from natural sources to fuel the fern growth that asparagus depends on for next year's spear production. A formula like 4-6-4 made from elemental sulfur, protein meals, bone char, and sulfate of potash delivers balanced organic nutrition with the nitrogen emphasis asparagus needs. The slow-release organic ingredients feed asparagus crowns steadily without burn risk. Old Cobblers Farm™ Wicked Organics Organic Asparagus Fertilizer is purpose-built for organic asparagus beds, delivering natural nutrition for bigger, more productive spear harvests.
How do I fertilize asparagus organically?
Apply organic asparagus fertilizer twice per year: in early spring before spears emerge, and in late summer after the harvest season ends. Broadcast 5–8 pounds per 100 square feet of bed area, extending 2–3 feet on both sides of the row. Remove mulch before applying, incorporate lightly into the soil surface, then replace the mulch. Water thoroughly. Organic fertilizers take 1–2 weeks to become fully available, so apply slightly earlier than you would with synthetics. Old Cobblers Farm™ Wicked Organics Organic Asparagus Fertilizer provides the sustained organic nutrition asparagus beds need year after year.
What ingredients are in organic asparagus fertilizer?
Wicked Organics Organic Asparagus Fertilizer is formulated from elemental sulfur, vegetable protein meals, animal protein meals, natural sulfate of potash, nitrate of soda, and bone char. Elemental sulfur provides sulfur nutrition and mild soil acidification. Protein meals deliver slow-release nitrogen for sustained fern growth. Bone char contributes phosphorus and calcium for crown health. Sulfate of potash provides chloride-free potassium for stress resistance. All ingredients are OMRI-Listed for organic production. Old Cobblers Farm™ uses only premium natural ingredients for effective organic asparagus nutrition.
Can I use organic asparagus fertilizer on other vegetables?
Yes, organic asparagus fertilizer can be used on other vegetables, though it is specifically optimized for asparagus. The balanced nutrient profile works well for heavy-feeding vegetables like broccoli, cabbage, cauliflower, and corn that benefit from higher nitrogen. For a more versatile organic vegetable fertilizer, consider Wicked Organics 5-3-4 or 10-2-8, which are designed for broader garden applications. Old Cobblers Farm™ Wicked Organics offers specialized formulas for asparagus, tomatoes, herbs, and general gardening to match the specific needs of each crop type.
How much organic asparagus fertilizer per row?
For asparagus rows, apply approximately 1 pound of organic fertilizer per 2 linear feet of row, broadcasting in a band 2–3 feet wide on both sides of the crowns. For 100 feet of row, use approximately 50 pounds. For small home garden beds, use 5–8 pounds per 100 square feet. The higher application rates for organic fertilizer compared to synthetic reflect the lower nutrient concentration of natural ingredients. Old Cobblers Farm™ Wicked Organics Organic Asparagus Fertilizer is gentle and safe at these rates, with virtually no risk of crown burn.
Is organic asparagus fertilizer better than synthetic?
Both organic and synthetic asparagus fertilizers effectively feed asparagus when applied correctly. Organic fertilizer offers additional benefits: it builds soil health and biology over time, reduces burn risk, provides trace minerals, and aligns with organic growing practices. Synthetic fertilizer offers faster nutrient availability and higher concentration per pound. Many asparagus growers combine both approaches — using organic for soil building and synthetic for targeted nutrition when needed. Old Cobblers Farm™ offers both Wicked Organics Organic Asparagus Fertilizer and Wicked Growth Asparagus Fertilizer 16-10-13 for flexible program design.
Is organic asparagus fertilizer OMRI-Listed?
Yes, Old Cobblers Farm™ Wicked Organics Organic Asparagus Fertilizer is OMRI-Listed for certified organic production. Every ingredient meets the Organic Materials Review Institute's strict standards for organic agriculture. This certification is important for organic asparagus growers selling at farmers markets, CSAs, or through organic retail channels where certified organic status adds value. Home gardeners also benefit from OMRI certification as assurance of genuinely organic ingredients. Old Cobblers Farm™ Wicked Organics carries the OMRI seal across its entire organic fertilizer line.
