Cal Mag Plus Concentrate Cal Mag Plus Solution Greenway Biotech Brand 25 Pounds = 10 Gallons

- FOUNDATION OF COMPLETE HYDROPONIC NUTRITION: Cal-Mag Plus delivers 3.2% calcium, 1.2% magnesium, and chelated iron - the essential secondary nutrients that base fertilizers lack. Part of our 4-part system designed for DWC, NFT, ebb and flow, drip systems, and coco coir growing. Always add first before other nutrients. - CRITICAL FOR RO WATER AND COCO COIR: Reverse osmosis and distilled water contain zero minerals - Cal-Mag Plus replaces what's missing. Coco coir naturally binds calcium, creating deficiencies even with tap water. Use every watering in coco at 5-10 ml/gal to prevent lockout and keep plants thriving. - HELPS PREVENT BLOSSOM-END ROT AND DEFICIENCY SYMPTOMS: Calcium strengthens cell walls to reduce the risk of blossom-end rot in tomatoes and peppers when used as part of a balanced feeding program. Magnesium supports chlorophyll production to prevent interveinal yellowing. Chelated iron remains available across a wide pH range to support healthy new growth. - 100% WATER SOLUBLE - ZERO RESIDUE: Dissolves completely in seconds for crystal-clear reservoir solution. No clogged drip lines, no pump damage, no sediment buildup. Creates stable stock solution (2.5 lb per gallon) with 6+ month shelf life. Compatible with all dosing and fertigation equipment. - SAVE 50-70% VS LIQUID CAL-MAG: Concentrated powder ships nutrients, not water. One 2.5 lb bag makes the same amount as multiple gallons of liquid product at a fraction of the cost. Approximately $0.08 per gallon of working solution. Long shelf life when stored dry - no waste from expired liquids. - WORKS IN ALL WATER CULTURE SYSTEMS: Formulated for recirculating (DWC, RDWC, NFT, ebb and flow) and drain-to-waste systems. Adjust rate based on water hardness: full strength for RO/distilled, 50-75% for soft tap, 25% or skip for hard water. Test your starting EC to dial in the perfect amount. - COMPLETE 4-PART SYSTEM INTEGRATION: Designed to work with Grow Green (vegetative), Micro Green (trace elements), and Blossom Green (flowering). Always add Cal-Mag first to water, dissolve fully, then add remaining nutrients in order. Prevents calcium precipitation and keeps all nutrients in solution. - LED GROWS MAY NEED MORE CAL-MAG: High-intensity LED lighting increases transpiration rates, pulling more calcium through plants faster. Many growers report slightly higher Cal-Mag rates under LEDs compared to HPS. Monitor for tip burn and adjust accordingly - prevention is easier than correction. - HEAVY METAL TESTED FOR FOOD-SAFE GROWING: Every batch is laboratory tested to verify freedom from heavy metal contamination. CDFA registered and manufactured in California, USA since 1989. When growing consumable crops, purity matters - trust a company with 35+ years serving serious growers. - WHO THIS IS NOT FOR: This is a concentrated supplement requiring mixing, measuring, and EC monitoring - not a complete standalone fertilizer. If you have hard tap water (EC above 0.5), you may not need additional Cal-Mag. Not recommended for soil growing or gardeners wanting pre-mixed solutions. Test your water first.

Product description

Cal Mag 2-0-0 Plus Iron EDTA

How to Apply Greenway Biotech Cal Mag Plus

How to Apply Greenway Biotech Cal Mag Plus

How to Apply Greenway Biotech Cal Mag Plus

How to Apply Greenway Biotech Cal Mag Plus

Our Core Values

Greenway Biotech's Cal Mag Plus contains a balanced ratio of Calcium, Magnesium, and Iron, which are critical throughout all stages of growth, especially in heavily blooming plants and annuals. Calcium and Magnesium are necessary for the prevention of blossom end rot in tomatoes and peppers, as well as the reduction of tip burn in lettuce. When used in combination with other nutrients Cal Mag Plus functions as a catalyst to increase the uptake of essential minerals.

At Greenway Biotech, we decided to sell pure concentrated Cal Mag Plus in powder form, increasing product yield while reducing excessive shipping cost. Doing so allows us to provide you with the highest quality Cal Mag Plus at a fraction of the cost. Another benefit to powder concentrate is that you can easily alter the concentration of the product to suit your particular needs.

Analysis (at a Ratio of 2.5 lbs. per Gallon):

Derived from: Calcium Nitrate, Magnesium Nitrate, Iron EDTA.

Dissolve the entire bag of Greenway Biotech Cal Mag Plus in water to achieve precise analysis.

The amount of water (in gallons) you need to dissolve your Cal Mag Plus depends on the size of the fertilizer bag. Please note the bag size and corresponding liquid fertilizer amounts in the table.

Transfer liquid Cal Mag Plus fertilizer into a lidded container.

Mix 5-10 milliliters of the liquid Cal Mag Plus fertilizer per 1 gallon of water.

We register all of our products through the California Department of Food and Agriculture (CDFA), ensuring the top quality possible.

CDFA is the highest regulated government agency and we not only meet their requirements, but exceed them. The heavy metal content of our products are either at zero or fall below amounts allowed by CDFA

We take pride in knowing we are a certified and minority owned small business.

Innovation is not exclusive to just one particular individual, but comes from those of all walks of life and we demonstrate this on a daily basis.

Our small business background is key to the trust we've built with our customers over the years and allows us to remain transparent while embracing community values.

We understand that we only have one Earth and it's up to us to take care of it!

We're doing our part by offering heavy metal free fertilizers that feed your plants the nutrients they need without harming the environment.

We even carry fertilizers suitable for Hydroponics to encourage fellow gardeners to practice cultivation methods that reduce water usage.

Meanwhile, our high quality, natural supplements encourage a shift away from synthetic medicine and towards a more holistic approach for personal wellness.

There's no better feeling than giving back to one's community and we decided the best way to do this was by creating our very own non-profit organization, Greenway Foundation.

One percent of all our sales are donated to Greenway Foundation to supply our students with adequate gardening supplies and inspire them to make healthy lifestyle choices by learning basic gardening practices.