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Monoammonium Phosphate Fertilizer 11-52-0

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$ 33.99
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$ 33.99
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$ 33.99
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Weight: 5 Pounds

Monoammonium Phosphate (MAP) 11-52-0 Granular Fertilizer | High Phosphorus | Greenway Biotech®

Monoammonium Phosphate (MAP) 11-52-0

Boost your flowering and fruiting success with our premium granular Monoammonium Phosphate (MAP) 11-52-0 fertilizer. This professional-grade formula delivers 52% phosphorus for exceptional root development, bloom production, and fruit set. Perfect for side dressing, broadcasting, and soil incorporation where controlled-release phosphorus is needed.

📦 NOTE: Depending on your shipping address, we may ship 50 pound items as two 25 pound bags for easier handling.

Guaranteed Analysis

11-52-0
Nitrogen (N) 11% • Phosphorus (P₂O₅) 52% • Potassium (K₂O) 0%
Granular Form for Soil Application

🌸 High Phosphorus

52% P₂O₅ concentration ideal for flowering plants, fruits, and vegetables.

🌱 Controlled Release

Granular form provides steady nutrient release throughout the growing season.

⚡ Ammoniacal Nitrogen

11% nitrogen in ammonium form for efficient uptake and acidifying effect.

KEY FEATURES & BENEFITS
  • High Phosphorus Content: 52% P₂O₅ provides concentrated nutrition for bloom and fruit development
  • Granular Formulation: Easy to apply, no mixing required, provides controlled nutrient release
  • Ammoniacal Nitrogen: 11% nitrogen in ammonium form for improved phosphorus uptake
  • Soil Application: Perfect for side dressing, broadcasting, and pre-plant incorporation
  • pH Acidifying: Helps lower soil pH in alkaline conditions
  • Versatile Use: Ideal for flowering plants, fruits, vegetables, and lawns
  • Professional Grade: Same quality used by commercial growers
  • Long-Lasting: Provides season-long phosphorus availability
DERIVED FROM

Agricultural Grade Monoammonium Phosphate (NH₄H₂PO₄)

Premium granular form provides controlled release and easy application compared to water-soluble grades. Ideal for direct soil application.

APPLICATION RATES & DIRECTIONS

MAP 11-52-0 is designed for soil application. Always incorporate into soil for best results.

🌱 Side Dressing Application

Crop Type Rate per 100 sq ft Application Method
Vegetables (General) 2-4 pounds 4-6" from plant stem
Tomatoes/Peppers 3-5 pounds At first flowering
Fruit Trees 5-8 pounds Drip line application
Flowering Plants 2-3 pounds Before bud formation
Root Vegetables 4-6 pounds At planting
Heavy Feeders 6-10 pounds Split applications

🌾 Broadcasting Rates

Application Rate Coverage
New Garden Beds 5-10 lbs/100 sq ft Till into top 6"
Established Lawns 2-4 lbs/100 sq ft Water in thoroughly
Pre-Plant Field 200-400 lbs/acre Incorporate before planting
Orchard Floor 3-5 lbs/tree Spread under canopy
⚠️ Important Application Notes:
  • This is NOT water-soluble - do not attempt to dissolve
  • Always incorporate into soil or water in thoroughly
  • Keep granules away from plant stems to prevent burn
  • Best applied before rain or irrigation
  • Wear gloves when handling
MAP 11-52-0 CALCULATOR

MAP 11-52-0 Granular Calculator

Calculate the right amount for your soil application needs.

🌱 Side Dressing Calculator

📋 Typical rate: 2-10 lbs per 100 sq ft

🌾 Broadcasting Calculator

📋 For new beds: 5-10 lbs per 100 sq ft

🌳 Tree & Shrub Application

📋 Apply at drip line: 3-5 lbs per tree

🏭 Field/Commercial Application

📋 Typical: 200-400 lbs per acre

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

If you're not completely satisfied, we offer a 30-day money-back guarantee. Simply return the unused portion in its original packaging, and we'll process a full refund.

Environmental Responsibility

We're committed to sustainable practices, including:

  • Biodegradable packaging
  • Precise nutrient formulation to reduce runoff
  • Support for eco-friendly farming methods
Charitable Contributions

1% of all profits go to our foundation, focused on improving educational opportunities for children.

FREQUENTLY ASKED QUESTIONS

Click on each question to see the answer.

What's the difference between MAP 11-52-0 and MAP 12-61-0?

The key differences between these two MAP formulations are:

MAP 11-52-0 (This Product):
  • Granular form - NOT water-soluble
  • 52% phosphorus, 11% nitrogen
  • For soil application only
  • Provides controlled, slow release
  • More economical for large areas
MAP 12-61-0:
  • 100% water-soluble powder
  • 61% phosphorus, 12% nitrogen
  • For fertigation, foliar, hydroponics
  • Immediate availability
  • Higher cost but more concentrated

Choose 11-52-0 when:

  • You need economical soil application
  • Controlled release is preferred
  • Broadcasting or side dressing
  • Working with field crops or large gardens
How do I apply MAP 11-52-0 granular fertilizer?

Side Dressing (Most Common):

  1. Apply 4-6 inches from plant stem
  2. Create shallow furrow along row
  3. Distribute granules evenly
  4. Cover with soil
  5. Water thoroughly

Broadcasting:

  1. Use broadcast spreader for even distribution
  2. Apply when soil is dry
  3. Till or rake into top 2-4 inches
  4. Water immediately after application

Tree/Shrub Application:

  • Apply at drip line (edge of canopy)
  • Spread evenly in circle around tree
  • Keep 6" away from trunk
  • Lightly scratch into soil surface
  • Water deeply after application
Safety Tips:
  • Wear gloves when handling
  • Avoid contact with plant foliage
  • Don't apply to wet leaves
  • Store in cool, dry place
When should I apply MAP 11-52-0?

Optimal Timing by Crop:

Vegetables:

  • At planting: Work into soil before seeding/transplanting
  • Side dress: When plants begin flowering
  • Root crops: All at planting (no side dress)

Fruit Trees:

  • Early spring: Before bud break
  • Post-harvest: Help restore reserves
  • Young trees: Split into 3-4 applications

Ornamentals:

  • Spring bloomers: Apply in fall
  • Summer bloomers: Apply in early spring
  • Perennials: When new growth appears

Lawns:

  • Cool-season: Early fall for root development
  • Warm-season: Late spring application
  • New lawns: Work into soil before seeding
General Rule: Apply MAP when plants need phosphorus most - during root development, before flowering, and during fruit formation.
Which crops benefit most from MAP 11-52-0?

High phosphorus requirements make MAP 11-52-0 ideal for:

Flowering Plants:

  • Annual flowers: Petunias, marigolds, zinnias
  • Bulbs: Tulips, daffodils, lilies
  • Roses: For abundant blooms
  • Flowering shrubs: Azaleas, rhododendrons

Fruiting Vegetables:

  • Tomatoes: Improves fruit set and size
  • Peppers: Increases yield and quality
  • Squash/Melons: Better fruit development
  • Beans/Peas: More pods per plant

Root Vegetables:

  • Potatoes: Larger tuber development
  • Carrots: Improved root growth
  • Beets: Better root formation
  • Onions: Larger bulb size

Commercial Crops:

  • Corn: Better ear fill
  • Soybeans: Increased pod count
  • Cotton: Improved boll development
  • Tree fruits: Enhanced fruit quality
Note: Phosphorus-sensitive plants (proteas, grevilleas) should receive reduced rates or alternative fertilizers.
DOCUMENTS & RESOURCES
HAVE QUESTIONS?

Our fertilizer experts can help you maximize your results with MAP 11-52-0.

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 3 reviews
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C
Chandrika Varadachari
Good quality

I used it for research work. The analysis was as described.

R
Robert Frey
Highly Recommended!

Soil Test results from our AG office suggested! Perfect cover - results awaiting for spring grass growing.

M
Michael S.
Monoammonium Phosphate 11-52-0

Well designed website and prompt delivery.