Mad Farmer Cal+Mag 1 Gallon
Best nutrient supplement for hydroponic and coco coir growers.
Mad Farmer Cal+Mag is a readily available Calcium and Magnesium supplement designed to enhance soil nutrient conditions and promote robust plant mass. This product is essential for growers using reverse osmosis (RO) water or coco coir mediums, effectively preventing deficiency disorders like blossom end rot. It contains no dyes and integrates seamlessly with any existing nutrient program. Cal+Mag is ideal for general-purpose supplementation with every feeding, applied directly to nutrient solutions or as a beneficial foliar spray for immediate uptake.
$52.98
Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 4425
#50 in Fertilizers
Price vs Category Average
-14%
Below average
Package Weight
9.2
/ lbs
Who it's for
- Gardeners struggling with common nutrient deficiency symptoms
- Growers managing diverse soil and hydroponic systems
- Commercial cultivators needing cost-effective bulk supplies
Who should skip it
- Growers wanting a low-maintenance, hands-off feeding routine
- Beginners struggling with complex nutrient mixing protocols
- Gardeners seeking an all-in-one complete fertilizer solution
Performance breakdown
Nutrient Bioavailability
Rapidly corrects deficiencies through highly soluble nitrate-based mineral delivery.
Medium Compatibility
Essential for coco coir growers and those using reverse osmosis water.
Application Versatility
Functions seamlessly as a root drench or a quick-acting foliar spray.
Formula Purity
Dye-free composition ensures no staining or unwanted buildup in irrigation lines.
System Integration
Neutral profile allows for easy blending with any existing nutrient regimen.
Deficiency Prevention
Proactive calcium and magnesium supplementation effectively stops blossom end rot.
Key Specs
Package Weight
9.2 lbs
Dimensions
6 × 6 × 12 in
Active Ingredients
Calcium Nitrate, Magnesium Nitrate, Iron EDTA
Form
Liquid Concentrate
Fertilizer Source
Synthetic
Application Method
Foliar Spray
Water Soluble
true
Organic Certified
false
Features
- Provides essential Calcium and Magnesium
- Prevents common plant deficiency disorders
- Ideal for RO water and coco coir
- Use with every feeding
- Suitable for hydroponics and soil
- Can be used as a foliar spray
- Dye-free formula
- Compatible with all nutrient programs
What customers say
Customers consistently praise Mad Farmer Cal+Mag for its exceptional quality and reliable performance in addressing common nutrient deficiencies. Gardeners report rapid correction of yellowing leaves and improved plant vigor, highlighting its effectiveness across various growing mediums. The product is frequently noted for its concentrated formula, delivering excellent value for money compared to competing supplements. Users appreciate the straightforward application, making it an essential and trusted staple in their nutrient regimens. This supplement is seen as a highly effective solution that justifies its price point through superior results.
Know before you buy
Many base nutrient programs lack sufficient calcium and magnesium, especially if you are using reverse osmosis water or growing in coco coir. This supplement is designed to be compatible with any existing program to prevent common deficiencies like blossom end rot.
Yes, Mad Farmer Cal+Mag is formulated for both root zone application and foliar feeding. Applying it as a foliar spray allows for immediate nutrient uptake, which is helpful if you notice signs of deficiency.
Absolutely. It is a versatile supplement suitable for a wide range of plants, including vegetables, flowers, trees, shrubs, and indoor houseplants, regardless of whether you are growing in soil or hydroponics.
No, this is a dye-free formula. It will not leave behind any artificial coloring in your reservoir or growing medium.
For best results, you can use Mad Farmer Cal+Mag with every feeding. Its quick-release formula ensures that your plants receive a consistent supply of essential calcium and magnesium throughout the growing season.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$53