Guaranteed Analysis
Nutrient Breakdown
N · Nitrogen4%
4.0% Total Nitrogen (1.5% Water Soluble, 2.5% Water Insoluble) — provides both immediate and slow-release nitrogen for sustained growth and flower production without overstimulating foliage at the expense of blooms.
P · Phosphorus6%
6.0% Available Phosphate (P2O5) — the highest phosphorus level in the Wicked Organics line, driving prolific flower bud formation, strong root systems, and abundant bloom production.
K · Potassium4%
4.0% Soluble Potash (K2O) — enhances bloom color and longevity, strengthens stems, improves disease resistance, and supports winter hardiness in perennial flowering plants.
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 4-6-4 is a premium organic fertilizer formulated from six natural ingredients — Elemental Sulfur, Animal Protein Meals, Vegetable Protein Meals, Natural Sulfate of Potash, Natural Nitrate of Soda, and Bone Char — to deliver the high-phosphorus nutrition that flowering plants need for maximum bloom production.
The guaranteed analysis breaks down to 4.0% Total Nitrogen (1.5% Water Soluble, 2.5% Water Insoluble), 6.0% Available Phosphate (P2O5), and 4.0% Soluble Potash (K2O). The water-insoluble nitrogen fraction releases slowly through microbial activity, providing sustained nutrition that feeds plants for weeks after application rather than delivering a single burst.
This is the same proven Pro-Holly formula used in the Wicked Organics Blueberry, Evergreen, and Citrus fertilizers — but marketed specifically for flowering plants where the high phosphorus content drives bloom production rather than acid-soil management. The elemental sulfur component provides soil-acidifying benefits as a bonus, making this formula also suitable for acid-loving flowering plants like azaleas, rhododendrons, and hydrangeas.
Crop Fit
Best For
RosesPeoniesHydrangeasAzaleasRhododendronsFlowering PerennialsAnnual FlowersFlowering Shrubs
Roses respond dramatically to the 6% phosphorus with more abundant, larger blooms and stronger cane growth. Peonies depend on phosphorus for the massive flower production they are prized for. Hydrangeas benefit from both the phosphorus for blooming and the sulfur for the acidic conditions that produce blue flowers. Azaleas and rhododendrons are acid-loving plants that thrive on this formula's natural ingredients that maintain proper soil pH while delivering complete nutrition. Flowering perennials like daylilies, irises, and coneflowers develop stronger crowns and more reliable bloom cycles. Annual flowers including petunias, marigolds, and zinnias produce more prolific blooms throughout the season. Flowering shrubs such as lilacs, forsythia, and butterfly bush respond with denser flower clusters.
Application Rates
How Much to Use
| Garden & beds | 1 lb per 2 feet of crown diameter for shrubs and perennials; 2-3 lbs per 100 sq ft for flower beds |
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| Lawn | N/A — formulated for flowering plants, not turf. Use 5-3-4 or 4-3-3 for lawns. |
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| Trees & shrubs | 1 lb per 2 feet of crown diameter, broadcast under the drip line |
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| Containers | 1-2 tbsp per gallon of soil |
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| Frequency | Twice per year — spring (when foliage begins to grow) and fall (after flowering). If only one application per year is practical, fall is preferred. |
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Step by Step
How to Apply
1Measure Plant
Calculate plant size by measuring crown diameter in feet. This determines your application rate.
2Application Rate
Apply 1 lb per 2 feet of crown diameter around each plant for proper dosing.
3Drip Line Application
Broadcast evenly under the drip line and beyond — feeder roots extend past visible branches.
4Flower Bed Rate
For flower beds, apply 2–3 lbs per 100 sq ft distributed evenly across the bed.
5Water In
Water in after application or allow rainfall to activate organic nutrient release.
6Timing
Apply in both spring and fall for best results. If only once per year, choose fall for winter root development.
7Mulch Tip
Fertilizer can be applied over mulch but responds faster if mulch is temporarily removed to expose soil.
Apply 1 lb of 4-6-4 per 2 feet of crown diameter, broadcast under the drip line of the plant. The feeder roots of most perennial plants are close to the soil surface and spread from under the branches to well outside the drip line — broadcast in this area around the entire plant if possible. The fertilizer can be applied over mulch layers, but plants respond faster if mulch is removed and replaced after application. For flower beds, broadcast 2-3 lbs per 100 sq ft and work lightly into the top 1-2 inches. Fall application is most effective because root systems are most active after a season of photosynthesis, readily absorbing nutrients for winter storage and spring growth. Spring application when foliage begins to grow provides essential nutrients for leaf development and bud formation.
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. Eye protection optional. Wash hands after use.
Seasonal Notes
Spring: Apply when foliage begins to grow to support new branch growth, leaf surface area, and bud development. Summer: Not typically needed — spring and fall applications cover the growing season. Fall: Most important application. Root systems are most active after a full season of photosynthesis. Slow-release nutrients applied in fall remain through winter and become available in early spring when plants first emerge. Winter: Do not apply to frozen ground.
In Context
How It Compares
The 4-6-4 delivers 50% more phosphorus than the balanced 5-3-4 and 4-3-3 formulas, making it the best choice specifically for flowering plants where bloom production is the priority. Compared to synthetic bloom boosters like 15-30-15, it delivers lower immediate nutrient concentration but feeds the soil ecosystem for longer-lasting results and eliminates burn risk. This is the same formulation as the Wicked Organics Blueberry, Evergreen, and Citrus fertilizers — all based on the proven Pro-Holly recipe — but positioned for general flowering plant use.
Answers
Frequently Asked Questions
What is the best organic fertilizer for flowers?
The best organic flower fertilizer provides elevated phosphorus to drive bloom production, balanced nitrogen for healthy foliage, and potassium for flower longevity and disease resistance. A 4-6-4 ratio is ideal because the higher phosphorus (6%) directly fuels flower bud formation and root strength, while the balanced nitrogen and potassium support overall plant vigor. The organic ingredients release slowly for sustained feeding throughout the blooming season. Old Cobblers Farm™ Wicked Organics 4-6-4 Fertilizer is specifically formulated for organic flower gardens, delivering bigger, more vibrant blooms from natural ingredients.
Can I use organic 4-6-4 on roses?
Yes, organic 4-6-4 is an excellent choice for roses grown in organic gardens. The elevated phosphorus supports abundant bloom production, while nitrogen maintains healthy canes and foliage and potassium improves disease resistance and flower color. Apply in early spring, after the first bloom flush, and in mid-summer for repeat-blooming varieties. The slow-release organic ingredients reduce the risk of root burn that can occur with synthetic rose fertilizers. Old Cobblers Farm™ Wicked Organics 4-6-4 Fertilizer delivers the organic bloom-boosting nutrition roses need for a season full of beautiful flowers.
What flowers benefit from organic 4-6-4?
Organic 4-6-4 benefits virtually all flowering plants, including roses, dahlias, peonies, irises, daylilies, coneflowers, zinnias, marigolds, petunias, geraniums, lavender, and all types of annuals and perennials. The bloom-focused phosphorus level supports heavy-flowering species, while the balanced nitrogen and potassium provide complete plant nutrition. Both sun and shade flowering plants respond well to this ratio. Old Cobblers Farm™ Wicked Organics 4-6-4 Fertilizer is versatile enough for mixed flower borders, cutting gardens, container plantings, and dedicated rose beds.
How much organic flower fertilizer per plant?
For individual flowering plants, apply 1–2 tablespoons of organic 4-6-4 per plant depending on size. For flower beds, broadcast 3–5 pounds per 100 square feet and work into the top few inches of soil. For containers, add 1 tablespoon per gallon of soil at planting and top-dress monthly during the blooming season. For established roses, use ¼–½ cup per bush. Always water thoroughly after application. Old Cobblers Farm™ Wicked Organics 4-6-4 Fertilizer is gentle enough that slight over-application will not harm plants, making it forgiving for home gardeners.
Is 4-6-4 organic fertilizer good for bulbs?
Yes, 4-6-4 is an excellent organic option for spring-flowering bulbs. The elevated phosphorus promotes strong root development during fall planting, which directly translates to better blooms in spring. Mix into the soil at the bottom of the planting hole or broadcast over the bed before setting bulbs. For established bulb plantings, top-dress in fall to replenish nutrients for next year's flowers. Old Cobblers Farm™ Wicked Organics 4-6-4 Fertilizer provides a natural alternative to synthetic bulb fertilizers, feeding bulbs gently while improving the soil they grow in.
What ingredients are in organic 4-6-4 flower fertilizer?
Wicked Organics 4-6-4 is formulated from vegetable protein meals, animal protein meals, bone char, and natural sulfate of potash. Bone char is the primary phosphorus source, providing plant-available phosphorus along with calcium for strong cell walls. The protein meals deliver slow-release nitrogen, and sulfate of potash provides chloride-free potassium. These OMRI-Listed ingredients feed plants steadily while building soil health through microbial activity. Old Cobblers Farm™ Wicked Organics 4-6-4 Fertilizer uses only high-quality natural ingredients for safe, effective organic flower nutrition.
Can I use organic 4-6-4 on my vegetable garden?
Yes, organic 4-6-4 can be used on vegetable gardens, particularly for crops that benefit from higher phosphorus levels like tomatoes, peppers, squash, and root vegetables. However, for leafy greens and vegetables that need more nitrogen, the Wicked Organics 10-2-8 or 5-3-4 formulas may be better suited. 4-6-4 is most effective on vegetables during flowering and fruiting stages when phosphorus demand is highest. Old Cobblers Farm™ offers a range of organic formulas so you can match the NPK ratio to your specific crop needs throughout the growing season.
