Organic Cottonseed Meal Fertilizer 5-2-1
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- $ 15.99
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- $ 15.99
- Regular Price
- $ 15.99
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- per
Cottonseed Meal 5-2-1 — Slow-Release Organic Fertilizer for Acid-Loving Plants
A natural, Non-GMO soil amendment derived from cotton manufacturing. Cottonseed Meal delivers slow-release nitrogen, phosphorus, and potassium while improving soil structure and lowering pH for acid-loving crops. Independently tested for heavy metal content.
Ideal Applications
FEATURES
🌿 Slow-Release Nitrogen
Delivers 5% nitrogen gradually over weeks, feeding plants consistently without the risk of foliage burn that fast-release synthetic fertilizers can cause.
🔬 Acidifying Action
Naturally lowers soil pH as it decomposes, making essential nutrients like iron and magnesium more available to acid-loving plants such as blueberries, azaleas, and camellias.
🧫 Feeds the Soil Food Web
As Cottonseed Meal decomposes, it feeds naturally occurring beneficial soil bacteria and fungi, stimulating microbial activity that improves nutrient cycling, root colonization, and long-term soil health.
🌾 High Organic Matter Content
Rich in organic matter that feeds the soil food web, improves water-holding capacity in sandy soils, and enhances aeration in heavy clay soils.
🌱 Non-GMO Sourcing
Derived from Non-GMO cotton manufacturing, providing a natural, plant-based nutrient source suitable for organic gardening programs and environmentally conscious growers.
🛡️ Tested for Heavy Metals
Independently lab tested for heavy metal content including lead and mercury, with results consistently well below required safety limits for agricultural use.
💧 Soil Moisture Regulation
Improves moisture retention in light, sandy soils while simultaneously enhancing drainage and aeration in dense, compacted soils — a dual benefit few amendments offer.
🌻 Complete NPK Nutrition
Balanced 5-2-1 ratio provides primary macronutrients — nitrogen for foliage, phosphorus for root and bloom development, and potassium for overall plant vigor and disease resistance.
🌍 Sustainable By-Product
Manufactured as a by-product of the cotton industry, Cottonseed Meal repurposes agricultural waste into a valuable plant nutrient, reducing environmental impact.
🔄 Season-Long Performance
The slow-release nature provides steady nutrient availability throughout the growing season, reducing the need for frequent reapplication and supporting consistent, healthy growth.
DERIVED FROM
Cottonseed Meal is a single-ingredient organic fertilizer derived entirely from the by-products of cotton manufacturing. The cottonseed is processed to extract oil, and the remaining meal is dried, ground, and enriched with beneficial soil microorganisms.
Primary Ingredient
Cottonseed Meal
The ground meal remaining after oil extraction from cottonseeds. Naturally contains nitrogen (5%), phosphorus (2%), and potassium (1%) in a slow-release organic form that feeds plants gradually as soil microbes break it down.
SCIENCE BEHIND THE FORMULA
5-2-1: Engineered for Organic Soil Feeding
Cottonseed Meal's 5-2-1 NPK ratio reflects the natural nutrient composition of the cottonseed itself. The nitrogen-dominant profile makes it an excellent slow-release nitrogen source, while the phosphorus and potassium provide supporting nutrition for root development and plant resilience. Because nutrients are bound in organic form, they become available gradually through microbial decomposition — eliminating burn risk and feeding the soil ecosystem simultaneously.
🌿 Nitrogen — 5% (Growth Engine)
The dominant nutrient in cottonseed meal. This organically bound nitrogen is released slowly as soil microbes decompose the meal, providing steady foliar growth and deep green color over 4-8 weeks without the surge-and-crash cycle of synthetic nitrogen.
🌸 Phosphorus — 2% (Root & Bloom Support)
Supports root establishment and flowering. While the phosphorus level is modest, the organic form ensures high plant availability and contributes to strong root architecture and fruit set in acid-loving crops.
⭐ Potassium — 1% (Plant Resilience)
Provides a baseline of potassium for cell wall strength, water regulation, and disease resistance. For heavy-feeding crops, supplement with a dedicated potassium source like Potassium Sulfate.
Why Nitrogen-Dominant?
🌿 Vigorous Vegetative Growth
The 5% nitrogen drives strong leaf and stem development, essential for photosynthesis and overall plant energy production during the growing season.
🕐 Gradual Release Profile
Unlike synthetic urea or ammonium-based fertilizers, cottonseed meal nitrogen requires microbial breakdown, meaning nutrients are released over weeks — matching the plant's natural uptake rhythm.
🔬 pH-Lowering Effect
As soil microbes decompose the organic nitrogen, they produce organic acids that gradually lower soil pH — a key benefit for acid-loving plants like blueberries, azaleas, and rhododendrons.
🧫 Soil Biology Support
The organic nitrogen and carbon in Cottonseed Meal serve as a food source for naturally occurring beneficial soil bacteria and fungi, stimulating biological activity that improves nutrient cycling and soil structure over time.
APPLICATION RATES & DIRECTIONS
Garden Beds & In-Ground Planting
| Application | Rate | Frequency |
|---|---|---|
| New garden beds | 2-4 lbs per 100 sq ft | Work into soil before planting |
| Established plants | 1-2 lbs per 100 sq ft | Side-dress every 4-6 weeks |
| Trees & shrubs | 1 lb per inch of trunk diameter | Apply around drip line in spring |
Berries & Acid-Loving Plants
| Crop | Rate | Timing |
|---|---|---|
| Blueberries | 1-2 lbs per plant | Early spring, before new growth |
| Azaleas & Rhododendrons | 1 lb per plant | After flowering |
| Strawberries | 2 lbs per 100 sq ft | Early spring & after harvest |
Lawns & Turf
| Application | Rate | Frequency |
|---|---|---|
| Spring green-up | 4-5 lbs per 100 sq ft | Once in early spring |
| Maintenance feeding | 2-3 lbs per 100 sq ft | Every 6-8 weeks during growing season |
Compost & Soil Amendment
| Use | Rate | Notes |
|---|---|---|
| Compost activator | 2-3 lbs per cubic yard | Mix into compost pile to accelerate decomposition |
| Soil conditioning | 3-5 lbs per 100 sq ft | Incorporate into top 4-6 inches of soil |
HOW TO USE
Garden Beds & In-Ground Planting
- Measure the area to be treated and calculate the appropriate amount of Cottonseed Meal based on the application rate table.
- For new beds, spread Cottonseed Meal evenly over the soil surface and work it into the top 4-6 inches using a garden fork or tiller.
- For established plants, apply as a side-dress by spreading the meal in a ring around the plant's drip line, keeping it 2-3 inches from stems.
- Water thoroughly after application to begin the slow-release process and to prevent the dry meal from blowing away.
- Reapply every 4-6 weeks during the growing season for sustained nutrition.
Berries & Acid-Loving Plants
- Apply in early spring before new growth begins, or after flowering for ornamental acid-loving shrubs.
- Spread the measured amount evenly around the base of each plant, extending to the drip line.
- Lightly scratch into the soil surface with a hand cultivator — avoid disturbing shallow root systems.
- Apply a layer of acidic mulch (pine bark, pine needles) on top to help maintain low pH and conserve moisture.
- Water gently to settle the meal into the soil.
Lawns & Turf
- Calculate the amount needed based on lawn area and application rate.
- Use a broadcast spreader for even distribution across the lawn.
- Water the lawn thoroughly after application to move the meal into contact with the soil.
- For best results, apply in early spring when soil temperatures reach 50°F (10°C) — microbial activity is needed for nutrient release.
Compost Activation
- Add 2-3 lbs of Cottonseed Meal per cubic yard of compost material.
- Mix thoroughly into the compost pile or layer with green and brown materials.
- The nitrogen in the meal accelerates microbial decomposition, speeding up the composting process.
- Keep the compost pile moist and turn regularly for best results.
COTTONSEED MEAL CALCULATOR
SAFETY & HANDLING
Personal Protective Equipment (PPE)
- Wear gloves when handling to prevent skin irritation from prolonged contact
- Use a dust mask when measuring or applying large quantities to avoid inhaling fine particles
- Work in a well-ventilated area when opening bags and measuring
- Wash hands thoroughly after handling
Storage Guidelines
- Store in a cool, dry place in the original sealed bag or an airtight container
- Cottonseed Meal can attract moisture and develop mold if exposed to humidity — keep tightly sealed
- Keep away from direct sunlight and heat sources
- Store away from children and pets — while organic, it is not intended for consumption
- Use within 12 months of opening for best biological activity
Application Precautions
- Do not apply directly against plant stems or trunks — maintain a 2-3 inch gap
- Water thoroughly after application to prevent dry meal from blowing in wind
- Avoid over-application — excessive nitrogen can cause excess vegetative growth at the expense of flowering and fruiting
- Apply when soil temperatures are above 50°F (10°C) for effective microbial breakdown
First Aid
- Eye contact: Flush with clean water for 15 minutes. Seek medical attention if irritation persists
- Skin contact: Wash affected area with soap and water
- Ingestion: Do not induce vomiting. Contact Poison Control (1-800-222-1222) or seek medical attention
- Inhalation: Move to fresh air. Seek medical attention if respiratory symptoms persist
Refer to the Safety Data Sheet (SDS) for complete safety information.
COMPLETE YOUR SYSTEM
Cottonseed Meal provides a solid organic nitrogen foundation. Pair it with these products for a complete feeding program:
Bone Meal 3-15-0
Boosts phosphorus for stronger roots and more abundant blooms in organic gardens.
Potassium Sulfate 0-0-50
Supplements potassium for fruit quality, disease resistance, and overall plant vigor.
Kelp Meal 2-0-4
Adds trace minerals, natural growth hormones, and potassium for stress tolerance.
Epsom Salt (Agricultural)
Provides magnesium and sulfur to support chlorophyll production and nutrient uptake.
Gypsum (Calcium Sulfate)
Adds calcium without raising pH — ideal for acid-loving plants that need calcium supplementation.
Elemental Sulfur
Further lowers soil pH for extremely acid-loving crops like blueberries and cranberries.
FREQUENTLY ASKED QUESTIONS
Is Cottonseed Meal safe for organic gardening?
Cottonseed Meal is a natural, plant-based fertilizer derived from cotton manufacturing. It is Non-GMO and contains no synthetic chemicals. It is widely used in organic gardening programs. Always verify with your certifying agency if you require specific organic certification compliance, as requirements vary by program. For more tips on organic fertilizer options, see our guide on Fertilizing Your Organic Garden.
How long does it take for Cottonseed Meal to release nutrients?
Cottonseed Meal is a slow-release fertilizer. Nutrients become available over a period of 4-8 weeks as soil microorganisms decompose the organic matter. The release rate depends on soil temperature, moisture, and microbial activity — warmer, moist soils with active biology will break down the meal faster. This gradual release eliminates the risk of foliage burn and provides consistent feeding throughout the growing season.
Will Cottonseed Meal lower my soil pH?
Yes. Cottonseed Meal is naturally acidic and will gradually lower soil pH as it decomposes. This makes it especially beneficial for acid-loving plants like blueberries, azaleas, camellias, and rhododendrons. If your soil is already acidic and you don't want to lower pH further, monitor soil pH regularly and consider liming if needed. For most vegetable gardens with neutral to alkaline soils, the pH-lowering effect is a benefit that helps unlock micronutrients like iron and magnesium.
Can I use Cottonseed Meal in containers and raised beds?
Yes. Mix Cottonseed Meal into potting soil or raised bed mix at a rate of 1-2 cups per cubic foot of soil. Because containers have limited soil volume, start with the lower rate and observe plant response before adding more. The organic matter also helps container soils retain moisture and maintain structure over time.
Does Cottonseed Meal attract pests or animals?
As an organic material, Cottonseed Meal can attract some animals (especially dogs and rodents) if left exposed on the soil surface. To minimize this, work the meal into the top few inches of soil and water thoroughly after application. Covering with mulch also helps reduce the period during which the meal is attractive to pests.
How does Cottonseed Meal compare to Blood Meal or Feather Meal?
All three are organic nitrogen sources, but they differ in release speed and NPK ratios. Blood Meal (13-0-0) provides a faster nitrogen boost with no phosphorus or potassium. Feather Meal (12-0-0) is a very slow-release nitrogen source. Cottonseed Meal (5-2-1) has a moderate release rate and uniquely provides all three macronutrients plus a pH-lowering effect, making it the most versatile choice for acid-loving plants and general soil conditioning.
How much area does one bag of Cottonseed Meal cover?
Coverage depends on the application rate and bag size. At the standard rate of 2-4 lbs per 100 sq ft for new garden beds, a 5 lb bag covers approximately 125-250 sq ft, a 10 lb bag covers 250-500 sq ft, and a 44 lb bag covers approximately 1,100-2,200 sq ft. For precise calculations, use our Cottonseed Meal Calculator above.
GROW WITH CONFIDENCE
Every Greenway Biotech product is backed by rigorous quality standards, transparent testing, and a commitment to sustainable agriculture.
Product Quality Guaranteed
- Sourced from Non-GMO cotton manufacturing facilities
- Tested by independent third-party laboratories for purity and heavy metal content
- Registered with the California Department of Food and Agriculture (CDFA)
- Consistent NPK analysis confirmed through regular batch testing
Hassle-Free Return Policy
If you're not completely satisfied, we offer a 90-day money-back guarantee. Simply return the unused portion in its original packaging, and we'll process a full refund. No questions asked.
Environmental Responsibility
We're committed to sustainable practices, including:
- Repurposing agricultural by-products into valuable plant nutrients
- Recyclable packaging materials
- Promoting organic and natural alternatives to synthetic chemicals
- Support for integrated pest management (IPM) practices
Charitable Contributions
1% of all profits go to our foundation, focused on improving educational opportunities for children in agricultural communities.
DOCUMENTS
- 📄 Safety Data Sheet (SDS)
- 🔬 Certificate of Analysis (COA) — Available upon request
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