Cal-Mag Plus 2-0-0 Concentrate โ 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 foundation of our 4-part hydroponic system. Premium chelated calcium, magnesium, and iron prevent deficiencies and strengthen plants. Critical for RO water, coco coir, and LED grows. Save 50โ70% vs. liquid Cal-Mag while getting laboratory-tested purity.
Deficiency Prevention Timeline
(always before other nutrients)
โก Quick Dosage Guide โ By Water Type
Select your water type for instant dosing recommendations:
PERFECT FOR THESE APPLICATIONS
COMMON DEFICIENCY PROBLEMS? WE HAVE SOLUTIONS
WHY GROWERS CHOOSE CAL-MAG PLUS
๐ฏ Balanced Ca-Mg-Fe Formula
3.2% Calcium, 1.2% Magnesium, plus chelated iron prevents deficiencies in fast-growing crops.
๐ง Crystal Clear Solution
Dissolves completely in seconds with no residueโsafe for all hydroponic systems including drip and aeroponic.
๐ฐ 50โ70% Cost Savings
Concentrated powder ships nutrients, not waterโreducing costs and carbon emissions.
๐ก๏ธ Deficiency Prevention
Stops blossom-end rot, tip burn, and interveinal chlorosis before they start.
โฐ Indefinite Shelf Life
Powder never expires when kept dryโno waste from expired liquid products.
๐ฟ Eco-Friendly
90% less shipping weight than liquid products reduces environmental impact.
โ ๏ธ Critical Mixing Instructions
- ALWAYS add Cal-Mag Plus FIRST to your water before any other nutrients
- Never mix concentrates directly togetherโprevents precipitation
- Essential for RO/distilled water (0 EC)โcontains no minerals
- Coco coir requires Cal-Mag every watering to prevent lockout
- LED grows may need 25% more due to increased transpiration
FORMULA EXPLAINED: 2-0-0 + Ca + Mg + Fe
Precision Formulation for Hydroponics
Cal-Mag Plus provides the essential secondary nutrients that base fertilizers lack. The 2% nitrogen comes from nitrate sources for immediate plant availability.
Calcium 3.2%
Cell Wall Strength
Prevents blossom-end rot, tip burn, and structural weakness. Critical during rapid growth phases.
Magnesium 1.2%
Chlorophyll Core
Essential for photosynthesis. Prevents interveinal chlorosis (yellowing between veins).
Iron 0.1% EDTA
Chelated for Stability
Stays plant-available across pH range. Prevents new growth yellowing.
WHAT'S INSIDE: PROFESSIONAL-GRADE INGREDIENTS
Derived From
APPLICATION RATES & INSTRUCTIONS
Cal-Mag Plus is the foundation of our 4-part system. Always add it FIRST to prevent precipitation.
๐ฆ Stock Solution Preparation
| Package Size | Water Needed | Concentration | Yield |
|---|---|---|---|
| 2.5 lbs | 1 gallon | 2.5 lb/gal | 1 gal concentrate |
| 5 lbs | 2 gallons | 2.5 lb/gal | 2 gal concentrate |
| 10 lbs | 4 gallons | 2.5 lb/gal | 4 gal concentrate |
| 25 lbs | 10 gallons | 2.5 lb/gal | 10 gal concentrate |
๐ง Water Type Adjustments
| Water Type | EC Reading | Cal-Mag Rate | Notes |
|---|---|---|---|
| RO/Distilled | 0.0 | 100% (10 ml/gal) | Always required |
| Soft Tap | 0.1โ0.3 | 75% (7.5 ml/gal) | Monitor monthly |
| Medium Tap | 0.3โ0.5 | 50% (5 ml/gal) | Test water report |
| Hard Tap | >0.5 | 25% or skip | May have enough |
๐ฑ Complete 4-Part Feeding Schedule (ml/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 |
|---|---|---|---|---|---|
| Seedlings | 2.5 | 1.25 | 1.25 | 1.25 | 0.5โ0.8 |
| Early Veg | 5 | 5 | 5 | 5 | 1.0โ1.4 |
| Late Veg | 7.5 | 15 | 10 | 5 | 1.4โ1.8 |
| Transition | 10 | 10 | 10 | 10 | 1.6โ2.0 |
| Early Bloom | 10 | 5 | 10 | 15 | 1.8โ2.2 |
| Peak Bloom | 10 | 0 | 10 | 20 | 2.0โ2.5 |
| Late/Flush | 5 | 0 | 7.5 | 15 | 1.5โ2.0 |
๐ฌ Deficiency Prevention Guide
| Symptom | Deficiency | Solution |
|---|---|---|
| Blossom-end rot | Calcium | Increase to 15 ml/gal |
| Yellow between veins | Magnesium | Foliar spray 5 ml/gal |
| Brown leaf tips | Calcium | Check pH (5.5โ6.5) |
| New growth yellowing | Iron | Lower pH to 5.8 |
โ ๏ธ Special Considerations
- Coco Coir: Use every wateringโcoco binds calcium
- LED Grows: Increase 25% due to higher transpiration
- Foliar Spray: 5 ml/gal at dawn/dusk for quick correction
- Hard Water: Test firstโmay not need Cal-Mag
CAL-MAG PLUS CALCULATOR
COMPARE WITH OTHER CAL-MAG PRODUCTS
| Feature | Cal-Mag Plus 2-0-0 | Liquid Cal-Mag | CalMag Pro |
|---|---|---|---|
| Form | Dry Powder | Liquid | Liquid |
| Ca-Mg-Fe | 3.2-1.2-0.1 | 2-0.5-0.1 | 3-1-0 |
| Shelf Life | Indefinite | 2 years | 3 years |
| Cost per gallon | $0.08 | $0.25 | $0.20 |
| Shipping Weight | 90% less | Heavy | Heavy |
| System Design | 4-Part Complete | Supplement | Supplement |
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 with balanced NPK for lush, healthy foliage.
EssentialBlossom Green 2-6-8
Flowering formula with high P-K for abundant blooms and fruit development.
EssentialMicro Green 2-0-3
Complete micronutrient package with chelated trace elements.
Using all 4 components ensures balanced nutrition from seed to harvest.
QUICK REFERENCE GUIDE
๐ Cal-Mag Plus Quick Reference
2.5 lbs per gallon water
Mix until fully dissolved
2.5โ10 ml/gal working solution
Based on water type & stage
5 ml/gal
Apply at dawn/dusk
10 ml/gal soak
Pre-treat new coco
Measurement conversions: 5 ml = 1 tsp | 15 ml = 1 tbsp | 30 ml = 1 fl oz
GROW WITH CONFIDENCE
Product Quality Guaranteed
- Third-party lab tested for purity and heavy metals
- CDFA registeredโmeets California's strict agricultural standards
- Manufactured in California since 1989
- Used by commercial growers worldwide
- Indefinite shelf life when stored dry
90-Day Satisfaction Guarantee
Not completely satisfied? Return within 90 days for a full refund. We stand behind every product we sell because we know it works.
Expert Support
Our team of horticulture experts is available MondayโFriday to help you get the best results. Call, email, or chatโwe're here to help your garden thrive.
FREQUENTLY ASKED QUESTIONS
Q Why choose powder over liquid Cal-Mag?
Powder costs 50โ70% less per dose, ships with 90% less weight, never expires when dry, takes less storage space, and allows you to adjust concentration based on your water. You're paying for nutrients, not water!
Q Do I need Cal-Mag if using tap water?
Test your water EC. Below 0.3 EC needs Cal-Mag. RO/distilled always requires it. Hard water (EC >0.5) may have enough, but test to be sure. Get a water report from your utility for calcium/magnesium levels.
Q Can I use it as a foliar spray?
Yes! Mix 5 ml of stock solution per gallon and spray at dawn/dusk when stomata are open. Great for rapid correction of deficiencies. Avoid hot sun and stop 2 weeks before harvest.
Q Is it required for coco coir?
Absolutely. Coco binds calcium, creating deficiencies even with tap water. Use Cal-Mag every watering at 5โ7.5 ml/gal. Pre-buffer new coco with 10 ml/gal solution before use.
Q How do I know if my plants need more?
Calcium deficiency: blossom-end rot, brown spots, tip burn. Magnesium deficiency: yellowing between leaf veins on older leaves. Iron deficiency: yellowing of new growth. Prevention is easier than correction!
Q Why add Cal-Mag first before other nutrients?
Calcium can precipitate (form white solids) when mixed directly with concentrated sulfates or phosphates. Adding Cal-Mag to water first and diluting it prevents this reaction and keeps all nutrients in solution.
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