Magnesium Nitrate Fertilizer 11-0-0
- Regular Price
- $ 26.99
- Sale Price
- $ 26.99
- Regular Price
- $ 22.99
- Unit Price
- per
Magnesium Nitrate Fertilizer 11-0-0
Unlock vibrant green growth and maximize photosynthesis with our premium Magnesium Nitrate Fertilizer. This 100% water-soluble formula delivers 11% nitrogen and 9.6% magnesium—essential for chlorophyll production and enzyme activation. Perfect for correcting magnesium deficiencies while providing fast-acting nitrate nitrogen in both hydroponic and soil systems.
Perfect For These Applications
Quick Application Guide
FEATURES
- High Nutrient Content: 11% nitrogen, 9.6% magnesium, 16% magnesium oxide
- Essential for Photosynthesis: Magnesium is the central atom of every chlorophyll molecule
- 100% Nitrate Nitrogen: Immediately plant-available, no microbial conversion needed
- 100% Water Soluble: Complete dissolution with no residue for any application method
- pH Neutral: Won't significantly alter soil or solution pH
- Tank A Compatible: Safe to mix with calcium nitrate in concentrated solutions
- Professional Grade: Same quality used by commercial growers and greenhouses
- CDFA Registered: California Department of Food & Agriculture approved
- Made in USA: Packaged at our California facility since 1989
- Heavy Metal Tested: Third-party verified for purity and safety
- 90-Day Guarantee: Full refund if not satisfied with results
DERIVED FROM
Magnesium Nitrate, Magnesium Oxide
Guaranteed Analysis:
- Total Nitrogen (N): 11%
- 11% Nitrate Nitrogen
- Magnesium (Mg): 9.6%
- Magnesium Oxide (MgO): 16%
WHY CHOOSE GREENWAY BIOTECH
Since 1989, Greenway Biotech, Inc. has been a trusted source for premium fertilizers and growing supplies. Here's why growers choose us:
- 35+ Years Experience: Family-owned and operated since 1989, now based in Madera, California
- Professional Grade Quality: The same products trusted by commercial greenhouses and agricultural operations
- Third-Party Tested: Every batch tested for purity and heavy metals—results consistently well below required limits
- CDFA Registered: California Department of Food & Agriculture registered facility
- Made in USA: Packaged and quality-controlled at our California facility
- Expert Support: Real growers answering your questions—not call center scripts
- 90-Day Guarantee: Not satisfied? Full refund, no questions asked
- Fast Shipping: Free shipping on orders over $100, most orders ship same or next business day
DEFICIENCY CORRECTION TIMELINE
COMMON PROBLEMS & SOLUTIONS
WHY MAGNESIUM MATTERS
🔬 Magnesium: The Heart of Chlorophyll
Magnesium (Mg) sits at the center of every chlorophyll molecule, bonded to four nitrogen atoms. Without adequate magnesium, plants cannot perform photosynthesis.
Key Roles of Magnesium in Plants:
- Chlorophyll Production: Central atom in every chlorophyll molecule
- Enzyme Activation: Activates over 300 plant enzymes
- Energy Transfer: Essential for ATP production and phosphate metabolism
- Sugar Transport: Moves photosynthates from leaves to fruits and roots
- Protein Synthesis: Required for ribosome structure and function
IDENTIFYING MAGNESIUM & NITROGEN DEFICIENCY
Magnesium Nitrate corrects two common deficiencies at once. Learn to identify both for quick correction.
🟢 Magnesium Deficiency
Magnesium is mobile—symptoms appear on older, lower leaves first.
Healthy Leaf
Uniform dark green color. Veins and tissue same shade.
Mg Deficiency
Interveinal chlorosis—yellowing between veins while veins stay green. Older leaves first.
N Deficiency
Uniform pale green/yellow across entire leaf—veins AND tissue. Older leaves first, may drop.
Severe (Either)
Necrotic brown spots, premature leaf drop. Requires immediate correction.
- Magnesium deficiency: Yellow BETWEEN veins, veins stay green (interveinal chlorosis)
- Nitrogen deficiency: Entire leaf turns uniformly pale/yellow, including veins
HYDROPONIC A/B TANK COMPATIBILITY
In concentrated stock solutions, certain fertilizers must be kept separate. Here's where Magnesium Nitrate belongs:
- ✓ Magnesium Nitrate ← Here!
- ✓ Calcium Nitrate
- ✓ Iron Chelate (Fe-DTPA)
- ✓ Potassium Nitrate
- ✓ MKP (Monopotassium Phosphate)
- ✓ Magnesium Sulfate (Epsom)
- ✓ Potassium Sulfate
- ✓ Micronutrient blends
PRO-TIP: RO WATER VS. TAP WATER
Your source water dramatically affects your magnesium strategy. Understanding this is critical for preventing deficiencies before they start.
RO/Distilled Water
Starting PPM: ~0RO water is a "blank slate" with zero minerals. You're responsible for 100% of the Ca and Mg balance. Without supplementation, expect interveinal chlorosis within days of vegetative growth.
- Must add: Both Calcium and Magnesium
- Target ratio: 3:1 to 4:1 (Ca:Mg)
- Advantage: Complete control over mineral profile
Tap Water (Hard)
Starting PPM: 150-400+Hard tap water is high in Calcium Carbonate. While this provides some nutrition, a Ca:Mg ratio wider than 5:1 causes nutrient lockout—excess Calcium blocks Magnesium uptake even when Mg is present.
- Often needs: Extra Magnesium to balance
- Watch for: Ca:Mg ratio > 5:1
- Risk: Mg lockout despite adequate levels
📊 Source Water Comparison
| Factor | RO / Distilled | Soft Tap (<150 PPM) | Hard Tap (>250 PPM) |
|---|---|---|---|
| Starting Ca (ppm) | 0 | 20-60 | 80-200+ |
| Starting Mg (ppm) | 0 | 5-20 | 15-50 |
| Typical Ca:Mg Ratio | N/A (you set it) | 3:1 - 4:1 ✓ | 5:1 - 8:1 ⚠️ |
| Mg Nitrate Needed | Full dose | Standard dose | Higher dose to overcome antagonism |
| Lockout Risk | Low (if balanced) | Low | High (Ca blocks Mg) |
12-WEEK MAGNESIUM STRATEGY
Timing your magnesium sources correctly is the difference between good results and great results. Here's when to use Magnesium Nitrate vs. Epsom Salt across a typical 12-week flowering crop cycle.
The 12-Week Magnesium Strategy
Low dose Mg Nitrate. Build the "photosynthetic engine."
Peak Mg Nitrate usage. Maximum chlorophyll + N for structure.
Begin tapering Mg Nitrate. Reduce nitrogen input.
Switch to Epsom Salt. Sulfur aids terpene/oil production.
Clear water only. Allow plant to use stored nutrients.
🍅 Example: Tomato PPM Targets (12-Week Cycle)
| Week | Growth Stage | Mg Source | Mg (ppm) | N from Mg Source (ppm) |
|---|---|---|---|---|
| 1-2 | Seedling | Mg Nitrate | 30-40 | ~35 |
| 3 | Early Veg | Mg Nitrate | 50 | ~55 |
| 4-5 | Late Veg | Mg Nitrate | 60-70 | ~70 |
| 6-7 | Early Bloom | Mg Nitrate | 70-80 | ~80 |
| 8 | Transition | Mg Nitrate → Epsom | 60 | ~30 (tapering) |
| 9-10 | Fruit Development | Epsom Salt | 50-60 | 0 |
| 11 | Ripening | Epsom Salt | 40 | 0 |
| 12 | Harvest | None (flush) | 0 | 0 |
APPLICATION RATES & TIMING
Magnesium Nitrate can be applied through various methods for maximum flexibility and effectiveness.
🌱 Soil Application
| Application Method | Rate | Frequency | Notes |
|---|---|---|---|
| Soil Drench | 1-2 tsp/gallon | Every 2-4 weeks | Apply to moist soil |
| Foliar Spray | 1 tsp/gallon | Every 7-14 days | Spray early morning |
| Fertigation | 2-4 lbs/acre | Weekly during growth | Through drip systems |
🥬 Crop-Specific Applications
| Crop Type | Soil Application | Foliar Rate | Critical Timing |
|---|---|---|---|
| Tomatoes | 2 tsp/gallon | 1 tsp/gallon | Flowering & fruit set |
| Leafy Greens | 1.5 tsp/gallon | 0.5 tsp/gallon | Throughout growth |
| Citrus | 3 tsp/gallon | 1.5 tsp/gallon | Spring & fall |
| Cannabis | 1-2 tsp/gallon | 1 tsp/gallon | Weeks 3-6 of flower |
💧 Hydroponics & Fertigation
| System Type | PPM Target (Mg) | Rate | Notes |
|---|---|---|---|
| NFT/DWC | 50-80 ppm | 0.5-0.8 tsp/gal | Adjust based on water analysis |
| Ebb & Flow | 60-100 ppm | 0.6-1 tsp/gal | Higher for fruiting crops |
| Drip/DTW | 80-120 ppm | 0.8-1.2 tsp/gal | Account for runoff |
- Always add fertilizer to water, never water to powder
- Use warm water for faster dissolution
- Stir thoroughly until completely dissolved
- Add to Tank A (with calcium nitrate) in hydroponic systems
- Avoid mixing with high phosphate concentrates
MAGNESIUM NITRATE CALCULATOR
COMPARE: MAGNESIUM NITRATE VS EPSOM SALT
Quick Guide: Choose Magnesium Nitrate when you need both nitrogen AND magnesium. Choose Epsom Salt when you need magnesium without nitrogen (late flowering) or need sulfur.
| Feature | Magnesium Nitrate | Epsom Salt (Magnesium Sulfate) |
|---|---|---|
| Magnesium Content | 9.6% | 9.8% |
| Additional Nutrient | Nitrogen 11% | Sulfur 13% |
| Best For | Vegetative growth, early flower | Late flowering, sulfur-loving crops |
| pH Effect | Neutral | Slightly acidifying |
| Tank Compatibility | Tank A (with calcium) | Tank B (with phosphates) |
| Cold Soil Uptake | Excellent (nitrate) | Good |
| Water Solubility | 100% | 100% |
Bottom Line: Magnesium Nitrate is ideal during vegetative growth and early flowering when plants need both N and Mg. Switch to Epsom Salt late in flowering when additional nitrogen isn't desired.
- Apply foliar sprays early morning or evening when temps are below 85°F
- Always add fertilizer to water, never water to powder
- Use warm water for faster dissolution
- Can be tank-mixed with most fertilizers—avoid high phosphate concentrates
- Store in cool, dry place away from moisture in sealed container
DOCUMENTS & CERTIFICATIONS
FREQUENTLY ASKED QUESTIONS
When should I use magnesium nitrate vs Epsom salt?
How quickly does it correct magnesium deficiency?
Can I mix it with calcium fertilizers?
What's the ideal magnesium to calcium ratio?
Is magnesium nitrate safe for hydroponics?
How does magnesium nitrate affect pH?
Can I use this for foliar feeding?
What's the nitrogen form in this product?
- Immediately plant-available—No soil microbial conversion needed
- pH stable—Doesn't lower pH as aggressively as ammonium nitrogen
- Cold-soil friendly—Uptake isn't slowed by cool temperatures like ammonium
- Hydroponic ideal—Clean uptake without pH swings in reservoirs
COMPLETE YOUR SYSTEM
DISCOVER MORE GARDEN WISDOM
HAVE QUESTIONS?
Our fertilizer experts can help you determine the optimal application strategy for your growing situation.