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Monoammonium Phosphate Fertilizer 12-61-0

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Weight: 2 Pounds

Monoammonium Phosphate (MAP) 12-61-0 Fertilizer | High Phosphorus | Greenway Biotech®

Monoammonium Phosphate (MAP) 12-61-0

Transform your agricultural and gardening results with our premium Water-Soluble Monoammonium Phosphate (MAP) Fertilizer. This professional-grade formula delivers an exceptional 61% phosphorus content for enhanced flowering, fruiting, and root development. Perfect for commercial growers, greenhouse operators, and serious gardeners seeking maximum yields.

Guaranteed Analysis

12-61-0
Nitrogen (N) 12% • Phosphorus (P₂O₅) 61% • Potassium (K₂O) 0%
Industry-Leading Phosphorus Concentration

🌸 Maximum Phosphorus

61% P₂O₅ concentration promotes vigorous flowering, fruiting, and root establishment.

💧 100% Water-Soluble

Dissolves completely for drip irrigation, hydroponics, and foliar applications without clogging.

🎯 Professional Grade

CDFA registered, heavy metal free formula trusted by commercial growers worldwide.

KEY FEATURES & BENEFITS
  • Maximum Phosphorus Content: Industry-leading 61% phosphorus (P₂O₅) with 12% nitrogen for optimal growth
  • 100% Water-Soluble Formula: Rapidly dissolves for immediate availability through any irrigation system
  • Enhanced Flowering & Root Development: High phosphorus promotes vigorous roots and abundant blooms
  • Versatile Application: Perfect for vegetables, fruits, flowers, and ornamental plants
  • Reduced Environmental Impact: Precise formulation minimizes nutrient runoff and leaching
  • Quality Assurance: Rigorously tested for consistent, reliable results
  • Heavy Metal-Free: Ensuring crop purity and environmental safety
  • Professional Results: Used by commercial operations for maximum yields
DERIVED FROM

Technical Grade Monoammonium Phosphate (NH₄H₂PO₄)

Premium water-soluble grade provides superior dissolution and nutrient availability compared to agricultural grade MAP.

APPLICATION RATES & DIRECTIONS

Below are recommended rates for various growth stages and application methods. Adjust based on soil tests and crop requirements.

🌱 Vegetative Stage

Area Application Rate Frequency
Per 100 square feet 1-2 pounds Every 4-6 weeks
Per Acre 20-40 pounds During growing season
Container Plants (5 gal) 1-2 tablespoons Every 2-3 weeks

🌸 Flowering and Fruiting Stage

Area Application Rate Frequency
Per 100 square feet 2-4 pounds Every 4-6 weeks
Per Acre 40-80 pounds As needed
Container Plants (5 gal) 2-3 tablespoons Every 2 weeks

💧 Application Methods

Method Instructions Best For
Broadcasting Spread evenly with broadcast spreader, lightly incorporate into topsoil Field crops, lawns
Drip Irrigation Dissolve in water (1-2 lbs per 100 gallons), inject through system Vegetables, orchards
Foliar Spray 1-2 tbsp per gallon, spray leaves every 2-4 weeks Quick correction
Hydroponics Maintain 150-200 ppm P in solution Soilless systems
Important Notes:
  • Always conduct soil tests before application
  • Consider crop type and growth stage
  • Apply before planting or early in season for best results
  • Follow local regulations and avoid over-application
MAP FERTILIZER CALCULATOR

MAP 12-61-0 Calculator

Calculate the exact amount needed for your specific application.

🌾 Field/Garden Application

📋 Standard rates: 1-4 lbs per 100 sq ft depending on stage

💧 Fertigation/Injection

📋 For drip irrigation and injection systems

🍃 Foliar Spray

📋 Quick phosphorus boost: 1-2 tbsp per gallon

🏭 Commercial/Acre Application

📋 Large scale: 20-80 lbs per acre based on stage

Powered by Greenway Biotech, Inc. — Premium fertilizers since 1989

GROW WITH CONFIDENCE

Below are important details on quality, returns, sustainability, and charitable efforts that set our product apart.

Product Quality Guaranteed
  • All our products are manufactured in California, USA
  • Tested by independent third-party laboratories for quality assurance
  • Registered with the California Department of Food and Agriculture (CDFA)
  • Rigorously tested to ensure products are free from heavy metals
Hassle-Free Return Policy

We stand behind the quality of our Monoammonium Phosphate Fertilizer. If you're not completely satisfied with your purchase, we offer a 90-day money-back guarantee. Simply return the unused portion of the product in its original packaging, and we'll process a full refund, no questions asked.

Environmental Responsibility

At Greenway Biotech, we're committed to sustainable practices:

  • Our packaging is made from biodegradable materials
  • After use, you can leave the packaging in your garden or compost, where it will naturally degrade
  • We source our raw materials from reputable companies and countries
  • Precise nutrient formulation to minimize runoff and environmental impact
  • Support for sustainable farming practices
  • Ongoing research into organic and environmentally friendly fertilizer solutions
Charitable Contributions

At Greenway Biotech, we believe in giving back to our community and supporting education for children:

  • 1% of all profits from our product sales go to the Greenway Foundation
  • The Greenway Foundation is dedicated to helping children's education
  • Your purchase contributes directly to improving educational opportunities for children

For more information about the Greenway Foundation and its initiatives, please visit greenway.foundation.

DOCUMENTS
FREQUENTLY ASKED QUESTIONS

Click on each question to see the answer.

What makes MAP 12-61-0 ideal for flowering and fruiting?

MAP 12-61-0 is specifically formulated to support the high phosphorus demands during flowering and fruiting stages:

Key Benefits: The 61% phosphorus concentration is among the highest available in water-soluble fertilizers, providing maximum support for reproductive growth.

How phosphorus supports flowering:

  • Energy transfer through ATP production
  • Root development for nutrient uptake
  • Flower initiation and bud formation
  • Fruit set and seed development
  • Enhanced oil and sugar production in fruits

The 12% nitrogen component:

  • Provides balanced nutrition without excess vegetative growth
  • Ammonium form is immediately available to plants
  • Helps maintain proper pH in root zone

For best results, begin increasing MAP applications 1-2 weeks before expected flowering to build phosphorus reserves in plant tissues.

How do I use MAP in different growing systems?

Soil Application:

  • Broadcasting: Apply 2-4 lbs per 100 sq ft, work into top 2-4 inches of soil
  • Side dressing: Apply 1-2 tbsp per plant, 4-6 inches from stem
  • Pre-plant: Mix 20-40 lbs per acre before planting

Fertigation/Drip Systems:

  • Dissolve completely before injection (1-2 lbs per 100 gallons)
  • Maintain 150-200 ppm phosphorus in solution
  • Monitor EC levels - MAP will increase conductivity
  • Flush lines periodically to prevent buildup

Hydroponics:

  • Use as phosphorus source in nutrient solutions
  • Typical rate: 0.5-1.0 grams per gallon
  • Adjust pH after addition (MAP is acidic)
  • Compatible with most hydroponic nutrients

Foliar Application:

  • Mix 1-2 tablespoons per gallon of water
  • Add surfactant for better coverage
  • Apply early morning or late evening
  • Avoid application during flowering
Pro Tip: MAP is acidic (pH ~4.5 in solution), making it ideal for alkaline soils or when using hard water.
When should I apply MAP versus other phosphorus sources?

MAP 12-61-0 excels in specific situations compared to other phosphorus fertilizers:

Choose MAP when:

  • You need rapid phosphorus availability (100% water-soluble)
  • Soil pH is above 7.0 (MAP's acidity helps)
  • Using drip irrigation or fertigation systems
  • Plants show phosphorus deficiency symptoms
  • Transitioning to flowering/fruiting stage

MAP vs Other Sources:

Fertilizer P₂O₅ % Best Use
MAP 12-61-0 61% Quick availability, alkaline soils
DAP 18-46-0 46% Higher N needs, neutral soils
Triple Super 46% Slow release, acidic soils
Rock Phosphate 20-30% Organic, very slow release

Timing recommendations:

  • Pre-plant: Apply 2-4 weeks before planting
  • Transplanting: Mix in planting hole
  • Early growth: Light applications every 3-4 weeks
  • Pre-flowering: Increase rates 2 weeks before
  • Flowering/fruiting: Peak application period
What crops benefit most from MAP 12-61-0?

While all plants need phosphorus, some crops are particularly responsive to MAP applications:

High-Response Vegetables:

  • Tomatoes: Apply heavily at flowering for fruit set
  • Peppers: Increases fruit size and wall thickness
  • Melons: Enhances sugar content and fruit quality
  • Beans/Peas: Supports pod development
  • Root vegetables: Critical for root expansion

Fruits & Berries:

  • Strawberries: Improves fruit firmness and shelf life
  • Grapes: Enhances cluster fill and sugar content
  • Citrus: Supports heavy fruit loads
  • Stone fruits: Improves fruit size and quality

Ornamentals:

  • Flowering annuals: Prolongs blooming period
  • Roses: Increases bloom size and frequency
  • Bulbs: Essential for next year's flowers

Commercial Crops:

  • Cannabis: Critical during flowering for resin production
  • Cotton: Improves boll development
  • Corn: Enhances kernel fill
  • Soybeans: Increases pod count and size
Note: Phosphorus-sensitive crops like proteas and some Australian natives should receive reduced rates or alternative formulations.
HAVE QUESTIONS?

Check out our Frequently Asked Questions or contact our fertilizer experts for personalized advice.

Call us: (562) 351-5168
Email: questions@greenwaybiotech.com
Hours: Monday-Friday, 8AM-5PM PST

Greenway Biotech, Inc. | Est. 1989 | Making gardens and their humans healthier®

Premium fertilizers manufactured in California, USA

Customer Reviews

Based on 16 reviews
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J
JOSEPH Gianfrancesco
I would of liked 0-61-24

the product is good but the pakaging is poor for the second time I recived the pakage badly dammaged the inner pakaged rupured and all contents were loose in the outer pakage had to cleen and repakage in a baggie

Thank you so much for your honest feedback and for taking the time to leave a 5-star review despite the packaging issues.
We sincerely apologize for the damaged packaging you've experienced twice now. You're absolutely right to bring this to our attention, and we truly appreciate your patience as we work through this challenge.
We recently transitioned to compostable packaging as part of our commitment to sustainability, but we're aware that this has unfortunately led to an increase in shipping damage. We're actively working on sourcing more durable compostable alternatives that will better protect your order during transit while maintaining our environmental values.
In the meantime, we'd love to make this right for you. Please reach out to us directly so we can send you a replacement with extra protective packaging, and we'll cover any inconvenience this has caused.
Your feedback helps us improve, and we're committed to finding packaging solutions that protect both your products and our planet. Thank you for your understanding as we work toward a better solution.

C
Charlie Bauerelen
Happy

Easy to use and quick delivery

D
Dennis Novinskey
Stuck in transit

Still haven’t even received the item from fed ex.. it was due to arrive 3/29

J
June Yya
12-61-0

In progress currently

A
ARMANDO RASCON

Have used as part of my personal foliar regimen for years and have always liked the product. Definitely appreciate the speedy service. Would definitely buy from you again.