Organic Manganese Sulfate Fertilizer
- Regular Price
- $ 19.99
- Sale Price
- $ 19.99
- Regular Price
- $ 19.99
- Unit Price
- per
Manganese Sulfate Fertilizer (31% Mn + 18% S)
Experience the power of our premium manganese sulfate fertilizer, one of the most potent micronutrient solutions on the market with over 99% purity. Containing 31% manganese and 18% sulfur in a fine powder form, this essential fertilizer prevents and corrects manganese deficiency, including the devastating "frizzle top" condition in palms. Perfect for both soil and hydroponic applications, it ensures optimal photosynthesis, enzyme activation, and chlorophyll production.
Manganese deficiency can severely impact plant health, causing chlorosis in new growth, weak stems, and reduced yields. Our high-purity manganese sulfate provides rapid correction of deficiency symptoms while the added sulfur enhances protein synthesis and overall plant vigor. Essential for palm trees, citrus, vegetables, and field crops, this versatile micronutrient supports healthy growth from seedling to harvest.
🌴 Prevents Frizzle Top
Essential for palm health, preventing the deadly frizzle top condition.
⚡ Enzyme Activation
Activates critical enzymes for photosynthesis and nitrogen metabolism.
💧 99%+ Pure Powder
Superior purity ensures maximum efficacy in all application methods.
KEY FEATURES & BENEFITS
- High Manganese Content: 31% Mn ensures efficient correction of deficiencies
- Prevents Frizzle Top: Essential for palm tree health and survival
- Photosynthesis Enhancement: Critical for chlorophyll production and light reactions
- Enzyme Activation: Required for over 35 different plant enzymes
- Disease Resistance: Improves lignin formation for stronger cell walls
- Added Sulfur (18%): Supports protein synthesis and plant metabolism
- Over 99% Pure: Pharmaceutical-grade quality for consistent results
- Versatile Application: Suitable for soil, foliar, hydroponic, and animal feed use
DERIVED FROM
Manganese Sulfate Monohydrate (MnSO₄·H₂O)
High-purity crystalline powder ensures complete solubility and rapid plant uptake for quick deficiency correction.
APPLICATION RATES & DIRECTIONS
Below are recommended rates for various applications. Manganese is especially critical for palms, citrus, and high-pH soils.
🌱 Soil Application
Application Method | Rate | Notes |
---|---|---|
Broadcast (Pre-plant) | 20-60 lbs/acre | 0.5-1.4 lbs/1000 sq ft |
Banded/Side-dress | 10-30 lbs/acre | More efficient than broadcast |
With Ammonium Sulfate | Add 50+ lbs/acre | Improves Mn availability |
Home Gardens | 1-2 lbs/1000 sq ft | Work into top 4-6 inches |
🍃 Foliar Application
Severity | Rate per 100 Gallons | Frequency |
---|---|---|
Nutritional Maintenance | 1 lb | Monthly during growth |
Mild Deficiency | 1-2 lbs | Every 2-3 weeks |
Severe Deficiency | 3 lbs | Weekly until corrected |
🌴 Palm Tree Application
Palm Size | Rate per Tree | Frequency |
---|---|---|
Small/Young | 2-4 oz | Every 3 months |
Medium | 4-8 oz | Every 3 months |
Large/Mature | 8-16 oz | Every 3 months |
Severely Deficient | Double rates | Monthly until recovery |
💧 Hydroponic & Other Uses
Application | Rate | Notes |
---|---|---|
Hydroponics | 0.5-2 ppm Mn | In nutrient solution |
Fertigation | 1-2 lbs/acre/application | Through irrigation system |
Animal Feed | As directed | Mix into commercial feed only |
Important Notes:
- Do not apply to foliage when plants are under moisture or heat stress
- Do not apply to deciduous tree crops during bloom
- Most susceptible palms: Queen, Royal, Pygmy Date, Paurotis, and Coconut
MANGANESE SULFATE CALCULATOR
Manganese Sulfate Calculator
Calculate the exact amount needed for your specific application.
🌱 Soil Application
📋 Broadcast: 20-60 lbs/acre | Banded: 10-30 lbs/acre
🍃 Foliar Spray
📋 Mix 1-3 lbs per 100 gallons based on deficiency level
🌴 Palm Trees
📋 Apply 2-16 oz per tree based on size, every 3 months
💧 Hydroponics
📋 Target: 0.5-2 ppm Mn in nutrient solution
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 90-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.
DOCUMENTS
- 📄 Material Safety Data Sheet
- 📋 Product Label / Spec Sheet (Coming Soon)
FREQUENTLY ASKED QUESTIONS
Click on each question to see the answer.
What is manganese sulfate and why is it essential for plants?
Manganese sulfate is a water-soluble micronutrient fertilizer containing 31% manganese and 18% sulfur. Manganese is essential for:
- Photosynthesis: Required for the water-splitting reaction that produces oxygen
- Enzyme activation: Activates over 35 different enzymes involved in plant metabolism
- Chlorophyll production: Essential for green color and light absorption
- Nitrogen metabolism: Helps plants utilize nitrogen efficiently
- Disease resistance: Promotes lignin formation for stronger cell walls
Without adequate manganese, plants cannot photosynthesize properly, leading to chlorosis, stunted growth, and eventual death.
What is "frizzle top" and how does manganese sulfate prevent it?
Frizzle top is a severe manganese deficiency condition primarily affecting palm trees. The progression includes:
- Early stage: New fronds emerge chlorotic (yellow), small, and weak
- Middle stage: Fronds appear withered, scorched, dwarfed, and distorted - giving the "frizzled" appearance
- Late stage: Only small brown stubs emerge, followed by palm death
Most susceptible palms include Queen Palms, Royal Palms, Pygmy Date Palms, Paurotis, and Coconut Palms. Regular applications of manganese sulfate (every 3 months) prevent this condition by ensuring adequate manganese for chlorophyll production and enzyme function. For severely deficient palms, monthly applications at double rates may be needed until recovery.
How can I identify manganese deficiency in my plants?
Manganese deficiency symptoms vary by plant but typically include:
- Interveinal chlorosis: Yellowing between leaf veins while veins remain green (on young leaves first)
- Gray specks: Small necrotic spots on leaves, especially in cereals
- Stunted growth: Reduced plant height and delayed maturity
- Poor fruit set: Reduced flowering and fruit development
- Specific symptoms: "Marsh spot" in peas, "gray speck" in oats, "frizzle top" in palms
Deficiency is most common in:
- High pH soils (above 7.0) where Mn becomes unavailable
- Sandy soils with low organic matter
- Over-limed soils
- Poorly drained soils where Mn is reduced to unavailable forms
What's the best application method for manganese sulfate?
The optimal method depends on your situation:
- Foliar spray (most efficient): 1-3 lbs per 100 gallons provides quick correction within 1-2 weeks. Best for actively growing plants before full leaf expansion.
- Soil application: 20-60 lbs/acre broadcast or 10-30 lbs/acre banded. Less efficient due to soil tie-up but longer lasting.
- Combination with ammonium sulfate: Adding 50+ lbs/acre ammonium sulfate improves Mn availability by acidifying soil microsites.
- For palms: Apply 2-16 oz per tree directly to soil under canopy every 3 months.
Important: Never apply during plant stress, avoid application during bloom on deciduous trees, and ensure thorough coverage for foliar applications.
Can manganese sulfate be used in organic farming and animal feed?
Organic farming: Manganese sulfate is generally approved for organic production when soil deficiency is documented. Always verify with your certifying agency. Natural sources like manganese oxide may be preferred by some certifiers.
Animal feed: Yes, our manganese sulfate is suitable for animal feed supplementation when mixed into commercial feed (never fed directly). Manganese is essential for:
- Bone development and growth
- Reproductive performance
- Enzyme systems
- Prevention of perosis in poultry
Consult your local agricultural extension service for specific recommendations on usage rates in animal feed.
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Check out our full FAQ or contact our support team for personalized advice.
Email: questions@greenwaybiotech.com