Cal-Mag Plus 2-0-0 Concentrate – Heavy-Metal-Free Ca-Mg-Fe
- Regular Price
- $ 33.99
- Sale Price
- $ 33.99
- Regular Price
- $ 33.99
- Unit Price
- per
Cal-Mag Plus 2-0-0
Essential Component of Our 4-Part Hydroponic Nutrient System
Prevent calcium and magnesium deficiencies with our premium chelated Cal-Mag Plus powder. This critical component of our 4-part hydroponic system works synergistically with Grow Green, Blossom Green, and Micro Green to deliver complete nutrition. Stop blossom-end rot, enhance nutrient uptake, and strengthen cell walls while saving 50-70% on costs compared to liquid formulas.
🎯 Balanced Ca-Mg-Fe
3.2% Ca, 1.2% Mg, plus chelated iron prevents deficiencies in fast-growing hydroponic crops.
💧 100% Water-Soluble
Dissolves crystal-clear in seconds with no residue, perfect for all hydroponic systems.
💰 50-70% Cost Savings
Powder format ships nutrients, not water—reducing freight costs and carbon footprint.
🌟 Part of Our Complete 4-Part Hydroponic System
Cal-Mag Plus + Grow Green + Blossom Green + Micro Green = Perfect Plant Nutrition
Designed to work together for optimal results throughout all growth stages
FEATURES
- Precise Formulation: 2% N, 3.2% Ca, 1.2% Mg, 0.1% Fe-EDTA
- Prevents Deficiencies: Stops blossom-end rot and tip burn
- Heavy Metal Free: CDFA-registered and third-party tested
- Coco & RO Optimized: Essential for coco coir and reverse osmosis water
- Nutrient Catalyst: Enhances uptake of other nutrients in the system
- Professional Grade: Used by commercial growers worldwide
- Eco-Friendly: Reduces packaging waste and shipping emissions
- Cost-Effective: Concentrated powder saves money vs. liquid products
DERIVED FROM
Calcium Nitrate • Magnesium Nitrate • Iron EDTA
Professional-grade chelated minerals ensure maximum availability and uptake in hydroponic systems.
APPLICATION RATES & MIXING INSTRUCTIONS
Cal-Mag Plus 2-0-0 is an essential component of our 4-part hydroponic nutrient system. Always use alongside Grow Green, Blossom Green, and Micro Green for complete plant nutrition.
📦 Stock Solution Preparation (All Products)
| Product | Package → Water | Concentration | Shelf Life |
|---|---|---|---|
| Cal-Mag Plus 2-0-0 | 2.5 lbs → 1 gallon | 2.5 lbs/gallon | 6+ months |
| Grow Green 4-2-6 | 1.7 lbs → 1 gallon | 1.7 lbs/gallon | 6+ months |
| Micro Green 2-0-3 | 1.5 lbs → 1 gallon | 1.5 lbs/gallon | 6+ months |
| Blossom Green 2-6-8 | 1.8 lbs → 1 gallon | 1.8 lbs/gallon | 6+ months |
📦 Cal-Mag Plus Package Sizes
| Package Size | Water Needed | Stock Solution Yield |
|---|---|---|
| 2.5 lbs | 1 gallon | 1 gallon concentrate |
| 5 lbs | 2 gallons | 2 gallons concentrate |
| 10 lbs | 4 gallons | 4 gallons concentrate |
| 25 lbs | 10 gallons | 10 gallons concentrate |
🌱 Complete 4-Part System Feeding Schedule (ml per gallon)
| Growth Stage | Cal-Mag Plus 2-0-0 |
Grow Green 4-2-6 |
Micro Green 2-0-3 |
Blossom Green 2-6-8 |
EC Target | pH Range |
|---|---|---|---|---|---|---|
|
Seedlings/Clones Week 1-2 |
2.5 | 1.25 | 1.25 | 1.25 | 0.5-0.8 | 5.5-6.5 |
|
Early Vegetative Week 3-4 |
5 | 5 | 5 | 5 | 1.0-1.4 | 5.5-6.5 |
|
Late Vegetative Week 5-6 |
7.5 | 15 | 10 | 5 | 1.4-1.8 | 5.5-6.5 |
|
Transition Week 7-8 |
10 | 10 | 10 | 10 | 1.6-2.0 | 5.5-6.5 |
|
Early Bloom Week 9-10 |
10 | 5 | 10 | 15 | 1.8-2.2 | 5.5-6.5 |
|
Peak Bloom Week 11-13 |
10 | 0 | 10 | 20 | 2.0-2.5 | 5.8-6.5 |
|
Late Bloom/Flush Week 14+ |
5 | 0 | 7.5 | 15 | 1.5-2.0 | 5.8-6.5 |
- Cal-Mag Plus FIRST - Always add to water before other nutrients
- Micro Green SECOND - Add after Cal-Mag is fully dissolved
- Grow Green THIRD - During vegetative stage
- Blossom Green FOURTH - During flowering stage
- Adjust pH LAST - Target 5.5-6.5 after all nutrients added
💧 Water Type Adjustments
| Water Type | EC Reading | Cal-Mag Adjustment | Other Adjustments |
|---|---|---|---|
| RO/Distilled | 0.0 | Use full rate | None needed |
| Soft Water | 0.1-0.3 | Use 75% rate | Monitor Ca/Mg |
| Medium Water | 0.3-0.5 | Use 50% rate | Test monthly |
| Hard Water | >0.5 | Use 25% or skip | May need to reduce all rates |
🔧 Hydroponic System Guidelines
| System Type | Feed Schedule | Special Notes | Res Change |
|---|---|---|---|
| DWC/RDWC | Continuous | Monitor pH daily | Weekly |
| NFT | Continuous | Check EC twice daily | Weekly |
| Ebb & Flow | 2-4x daily | Adjust concentration for frequency | Weekly |
| Drip/DTW | Multiple daily | Maintain 10-20% runoff | N/A |
| Coco Coir | 1-2x daily | Never let dry, always use Cal-Mag | N/A |
| Aeroponics | 15 min cycles | Use 75% concentration | Weekly |
🔬 Deficiency Prevention Guide
| Symptom | Likely Deficiency | Cal-Mag Plus Solution |
|---|---|---|
| Blossom-end rot (tomatoes, peppers) | Calcium | Increase to 10-15 ml/gal |
| Yellowing between leaf veins | Magnesium | Foliar spray at 5 ml/gal |
| Brown leaf tips/edges | Calcium | Increase frequency |
| New growth yellowing | Iron | Check pH (5.5-6.5) |
These products are specifically formulated to work together as a complete 4-part system. Do NOT mix with nutrients from other manufacturers as this can cause:
- • Nutrient lockout and precipitation
- • pH instability
- • Reduced effectiveness
- • Potential plant damage
- • RO Water Users: Always use Cal-Mag Plus (RO water lacks minerals)
- • Coco Coir: Essential to prevent calcium lockout
- • LED Grows: May need higher rates due to increased transpiration
- • Hard Water: Reduce rate if water EC > 0.3
CAL-MAG CALCULATOR
Cal-Mag Plus 2-0-0 Calculator
Calculate precise amounts for your hydroponic system or garden.
🧪 Stock Solution Mixer
📋 Calculate how much concentrate to make from your package size
💧 Hydroponic System
📋 For DWC, NFT, Ebb & Flow, or other hydroponic systems
🥥 Coco Coir Growing
📋 Special calculations for coco coir media
🍃 Foliar Spray
📋 Quick correction for visible deficiencies
🌟 Complete 4-Part System Calculator
📋 Get the complete nutrient recipe for your reservoir
- • 1 ml = 0.034 fl oz = 0.2 teaspoons
- • 5 ml = 0.17 fl oz = 1 teaspoon
- • 15 ml = 0.5 fl oz = 1 tablespoon
- • 30 ml = 1 fl oz = 2 tablespoons
- • 1 gallon = 3,785 ml
Powered by Greenway Biotech, Inc. — Premium hydroponic nutrients since 1989
GROW WITH CONFIDENCE
Our Cal-Mag Plus 2-0-0 is designed to give you peace of mind and exceptional results as part of our complete nutrient system.
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
- Designed specifically for hydroponic and soilless growing
Environmental Responsibility
We're committed to sustainable practices:
- Powder format reduces shipping weight by 90% vs. liquids
- Significantly lower carbon footprint per nutrient unit
- Minimal packaging waste compared to liquid products
- Precise formulation reduces nutrient runoff
- Supports efficient water use in hydroponic systems
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.
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.
Why choose powder over liquid Cal-Mag?
Powder Cal-Mag offers several advantages: it costs 50-70% less per dose, ships with a much smaller carbon footprint, takes up less storage space, never expires when kept dry, and allows you to adjust concentration based on your water source and plant needs. You're paying for nutrients, not water!
Can I use it as a foliar spray?
Yes! Mix 5 ml of stock solution per gallon of water and spray leaves at dawn or dusk when stomata are open. Foliar application provides rapid correction of deficiencies, especially for immobile nutrients like calcium. Avoid spraying during hot, sunny conditions or within 2 weeks of harvest.
Is it compatible with other nutrient brands?
Cal-Mag Plus 2-0-0 is specifically formulated to work with our 4-part Green Hydroponics system (Grow Green, Blossom Green, and Micro Green). While the calcium and magnesium can supplement other brands, we cannot guarantee compatibility or optimal results. Mixing with incompatible products may cause precipitation or nutrient lockout.
Do I need Cal-Mag if using tap water?
It depends on your water quality. Test your water - if EC is below 0.3 or you have soft water, you'll likely need Cal-Mag. Hard water (EC > 0.5) may contain sufficient calcium and magnesium, though not always in the right ratio. RO or distilled water always requires Cal-Mag supplementation.
How do I know if my plants need more Cal-Mag?
Common signs include: blossom-end rot in tomatoes/peppers, brown spots on leaves, leaf curl or cupping, interveinal chlorosis (yellowing between veins), stunted growth, and weak stems. Calcium deficiency typically appears on newer growth, while magnesium deficiency shows on older leaves first.
COMPLETE YOUR 4-PART SYSTEM
Cal-Mag Plus works best as part of our complete hydroponic nutrient system:
- 🌱 Grow Green 4-2-6 - Vegetative Growth Formula
- 🌸 Blossom Green 2-6-8 - Flowering Formula
- 🔬 Micro Green 2-0-3 - Complete Micronutrients
Using all 4 components ensures complete, balanced nutrition throughout your plants' lifecycle.
HAVE QUESTIONS?
Our hydroponic experts are here to help you succeed. Contact our support team for personalized advice on using our 4-part system.
Email: questions@greenwaybiotech.com