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Cal-Mag Plus 2-0-0 supplies calcium, magnesium, nitrate nitrogen and EDTA-chelated iron for hydroponic and soilless nutrient solutions. It comes as a dry powder: you dissolve the whole bag into a liquid concentrate, 2.5 lb in each gallon of water, then add 5–10 mL of that concentrate to each gallon of reservoir water, as the label directs.
Growers use it where the water or the base nutrient brings little calcium and magnesium, such as reverse-osmosis water and base feeds made without calcium. Add it to the reservoir water first, keep its concentrate apart from concentrated phosphate and sulfate fertilizers, and dissolve a whole bag at a time: the label says not to divide it. It is not a complete fertilizer, and the label gives no foliar or soil rate.
3.2% Ca · 1.2% Mg Calcium and magnesium as guaranteed on the label, with 2% nitrate nitrogen
0.1% Fe All of it chelated iron, from iron EDTA
5–10 mL per gallon The label rate: milliliters of mixed concentrate per gallon of reservoir. The calculator sizes your batches and your bag
Product facts & composition
Guaranteed analysis and product specifications, Greenway Biotech Cal-Mag Plus 2-0-0, from the product label
Specification
Detail
Name on the label
Cal Mag 2-0-0 Plus Iron
Total nitrogen (N)
2.00%, all of it nitrate nitrogen
Calcium (Ca)
3.20%
Magnesium (Mg)
1.20%
Iron (Fe)
0.10%, all of it chelated iron
Available phosphate (P₂O₅), soluble potash (K₂O)
None guaranteed (the grade is 2-0-0)
Derived from
Calcium nitrate, magnesium nitrate, iron EDTA
Form
Dry powder that you dissolve, a whole bag at a time, into a liquid concentrate
Mixing ratio
25 lb in 10 gallons of water, as printed on the label; the same 2.5 lb per gallon for every bag size
Label dose
5–10 mL of the mixed concentrate per gallon of reservoir (the label also prints 1–2 teaspoons), which is 1.3–2.6 mL per liter
Solubility
Highly water-soluble, according to the Safety Data Sheet
2.5 lb (1,134 g), 5 lb (2,268 g), 10 lb (4,536 g), and 25 lb (11,340 g), making 1, 2, 4, and 10 gallons of concentrate
Percentages are as printed on the product label. Dose it by volume, as the label does: the label gives milliliters of mixed concentrate per gallon, not the parts per million (ppm) of calcium or magnesium that each milliliter adds. If your recipe works in ppm, a lab analysis of your mixed concentrate or final solution gives those figures, or build the calcium and magnesium from weighed single salts (see Compare your options).
Best uses & benefits
Choose it when your nutrient solution needs calcium, magnesium and iron, and you would rather measure one liquid concentrate by the milliliter than weigh several salts.
Reverse-osmosis, distilled, and other low-mineral water
Water with little calcium or magnesium in it adds none to the solution, so the nutrients have to supply them. Tap and well water vary, so test yours first: University of Florida IFAS notes that many Florida wells supply 40–60 ppm calcium, not all of it available to the crop.
Base nutrients made without calcium
Cornell’s hydroponic recipe guide explains that calcium can combine with phosphates and sulfates to form insoluble precipitates in concentrated stocks, so recipes keep calcium out of those concentrates. Greenway’s Tomato Fertilizer 4-18-38, for example, contains no calcium by design. Cal-Mag Plus supplies calcium, magnesium and iron from its own concentrate.
Hydroponic and soilless systems
The label doses by the gallon of reservoir, so it suits recirculating systems, batches mixed for drip-to-waste, and the nutrient solution you water coco coir or rockwool with.
Greenway’s four-part program
Cal-Mag Plus is the calcium, magnesium and iron part of Greenway’s four-part system with Grow Green 4-2-6, Micro Green 2-0-3 and Blossom Green 2-6-8, and it goes into the reservoir water first. Each of the other products’ amounts is on its own page.
Where it is a poor fit
Garden soil, lawns, and potted plants in soil. The label gives a rate only per gallon of reservoir. For soil calcium, use Calcium Nitrate or Gypsum at the rates on their pages, based on a soil test.
Foliar sprays. The label gives no foliar rate. Clemson Extension reports that foliar calcium sprays are not effective against blossom-end rot.
Small amounts from a bag. The label says to dissolve the entire package and not to divide the bag, so you cannot weigh out part of one. Choose the bag size by how much concentrate you need.
Recipes written in ppm. The label gives no ppm per milliliter. Weighed single salts such as Calcium Nitrate and Magnesium Nitrate let you hit a ppm target.
Water already rich in calcium and magnesium. If a water test shows your water supplies what your recipe needs, you may not need a supplement.
A complete fertilizer. It supplies no phosphorus, potassium, or micronutrients other than iron. Use it alongside a base nutrient.
Application rates & directions
The mixing ratio and dose below are the product label’s directions. Measure the concentrate with a syringe, graduated cylinder, or measuring cup marked in milliliters, and start at the low end of the range.
Step 1: make the concentrate
Dissolve the entire bag in the amount of water for its size. The label says the entire package must be mixed, and the bag must not be divided into smaller portions. The Safety Data Sheet recommends warm, not boiling, water for the fastest dissolving; stir until the powder is fully dissolved.
Water for each bag of Cal-Mag Plus 2-0-0, at the label’s ratio of 25 lb per 10 gallons (2.5 lb per gallon)
Bag size
Dissolve in
Concentrate it makes
2.5 lb
1 gallon of water (3.8 L)
About 1 gallon
5 lb
2 gallons of water (7.6 L)
About 2 gallons
10 lb
4 gallons of water (15.1 L)
About 4 gallons
25 lb
10 gallons of water (37.9 L)
About 10 gallons
Mix it in a clean container you can seal, and label it with the date. The dissolved powder adds a little volume, so a bag makes slightly more concentrate than the water you start with.
Step 2: dose the reservoir
The label rate is 5–10 mL of concentrate per gallon of reservoir (the label also prints 1–2 teaspoons per gallon). Start at 5 mL per gallon, and go higher within the range only when a solution test or your nutrient program calls for more calcium and magnesium. Dose the gallons of water you mix each time you fill or refresh the reservoir.
Milliliters of Cal-Mag Plus concentrate for common reservoir and batch sizes, at the label rate of 5–10 mL per gallon
Water in the batch
Starting amount, 5 mL per gallon
Top of the label range, 10 mL per gallon
1 gallon (3.8 L)
5 mL
10 mL
5 gallons (18.9 L)
25 mL
50 mL
10 gallons (37.9 L)
50 mL
100 mL (3.4 fl oz)
20 gallons (75.7 L)
100 mL (3.4 fl oz)
200 mL (6.8 fl oz)
50 gallons (189 L)
250 mL (8.5 fl oz)
500 mL (16.9 fl oz)
100 gallons (379 L)
500 mL (16.9 fl oz)
1,000 mL (33.8 fl oz)
10 liters
13 mL
26 mL
100 liters
132 mL
264 mL
Mixing order
Add it to the water first, and never pour concentrates together. Fill the reservoir with water, add the Cal-Mag Plus concentrate, and stir, as the Safety Data Sheet directs. Then add each of your other nutrients one at a time, stirring between them. Cornell’s hydroponic recipe guide explains that calcium can combine with phosphates and sulfates to form insoluble precipitates, and UMass Extension reports that calcium nitrate and phosphate fertilizers mixed as concentrates form precipitates that settle out and can clog emitters, while the same fertilizers diluted in the final solution can be used together. Keep the Cal-Mag concentrate away from concentrated phosphate or sulfate fertilizers, such as a 4-18-38, monopotassium phosphate, or Epsom salt stock. For an unfamiliar combination, jar-test it first: mix the products into a jar of your water at the strengths you will use, let it stand, and look for cloudiness or sediment.
After everything is in, measure EC and pH. Oklahoma State University Extension describes EC as a measure of the salts in a nutrient solution and explains how to monitor both.
Your water
Count the calcium and magnesium your water already carries. Reverse-osmosis and distilled water bring little or none, so the full dose comes from the nutrients. Tap and well water vary: University of Florida IFAS notes that many Florida wells supply 40–60 ppm calcium, not all of it available to the crop. Ask your water utility for a report, or have the water tested for calcium and magnesium.
Storing the mixed concentrate
Keep the concentrate in a sealed, labeled, opaque container in a cool place. The iron in it is chelated with EDTA, and Albano and Miller (HortTechnology, 2001) found that Fe-EDTA in fertilizer solutions breaks down in light, which is why they recommend stock tanks that light cannot get through. The Safety Data Sheet says to store the concentrate sealed for up to 2–4 weeks and to discard it if it turns cloudy or forms a precipitate.
Uses with no rate on this page
Cal-Mag Plus is labeled for nutrient solutions only, with no rate for foliar sprays, garden soil, lawns, potted plants in soil, soaking or buffering coco coir, or growth-stage schedules. For any of these, email questions@greenwaybiotech.com with your plants, growing method, and water test.
How to use Cal-Mag Plus 2-0-0
Check your water. Find out how much calcium and magnesium your water already carries, from a utility report or a water test, and whether your base nutrient contains calcium.
Make the concentrate. Dissolve the entire bag in its gallons of warm water (2.5 lb per gallon), stir until fully dissolved, and store it sealed in a labeled, opaque container.
Dose the reservoir first. Fill the reservoir with water, add 5 mL of concentrate per gallon, and stir. Use up to 10 mL per gallon only if a solution test or your nutrient program calls for more.
Add your other nutrients. Add them one at a time, stirring between each. Never pour the Cal-Mag concentrate together with concentrated phosphate or sulfate fertilizers.
Check and repeat. Measure EC and pH, then feed. Dose each new batch of water the same way when you refill or refresh the reservoir.
Calculator & choosing a size
Formulas. Milliliters of concentrate = gallons of water in the batch × 5 (the starting amount) up to × 10 (the top of the label range), or liters × 1.32 up to × 2.64. Total concentrate for several batches = that amount × the number of batches. Gallons of concentrate = milliliters ÷ 3,785. Each 2.5 lb of product makes 1 gallon of concentrate, and bags are dissolved whole, so choose a bag that makes at least the gallons of concentrate you need.
Worked examples.
A 20-gallon reservoir refreshed weekly for four weeks: 80 gallons × 5 mL = 400 mL (13.5 fl oz) of concentrate, 100 mL per refill; a 2.5 lb bag (about 1 gallon, 3,785 mL, of concentrate) covers it. At 10 mL per gallon it takes 800 mL, which the same bag also covers.
A 200-gallon reservoir refreshed weekly for four weeks: 800 gallons × 5 mL = 4,000 mL, about 1.06 gallons of concentrate, 1,000 mL per refill; a 5 lb bag (about 2 gallons of concentrate) covers it. At 10 mL per gallon it takes 8,000 mL (2.11 gallons), more than one 5 lb bag makes.
A 200-liter tank mixed once: 200 × 1.32 = 264 mL of concentrate at the starting amount, 528 mL at the top of the range; a 2.5 lb bag covers it.
About how many gallons of nutrient solution the concentrate from each bag doses at the label rate
Bag size
Concentrate
At 5 mL per gallon
At 10 mL per gallon
2.5 lb
About 1 gallon (3,785 mL)
757 gallons
378 gallons
5 lb
About 2 gallons (7,570 mL)
1,514 gallons
757 gallons
10 lb
About 4 gallons (15,141 mL)
3,028 gallons
1,514 gallons
25 lb
About 10 gallons (37,854 mL)
7,570 gallons
3,785 gallons
Coverage is counted from the gallons of water each bag is dissolved in; the finished concentrate is slightly larger. The Safety Data Sheet says to store the mixed concentrate for up to 2–4 weeks, and even the 2.5 lb bag makes more concentrate than most home reservoirs use in that time, so choose the smallest bag that covers the batches you will mix in those weeks.
The calculator below asks how big each batch is and how many batches you will mix. It applies the label’s starting rate of 5 mL per gallon, shows the top of the range, and recommends the smallest bag whose concentrate covers your batches, plus a lower-price combination of bags when one exists. Prices, tax, and shipping are confirmed at checkout, and availability is confirmed when you add to cart.
The calculator needs JavaScript. If it does not appear, use the tables and formulas above to choose a size.
How Cal-Mag Plus works
Calcium. University of Georgia Extension (C 938) explains that calcium moves in the plant only in the xylem, carried with the water the roots take up, and cannot move from the leaves to developing fruit. When developing fruit runs short of calcium, blossom-end rot develops, and it cannot be reversed in that fruit. Clemson Extension lists swings in moisture, rainy or humid and cool weather, low calcium, root damage, and excess ammoniacal nitrogen, potassium, or magnesium among the contributing factors. A steady calcium supply in the solution can help reduce the problem when it comes with even watering and a healthy root zone; it is not a cure.
Magnesium. University of Minnesota Extension notes that magnesium moves within the plant, so a shortage shows first in the oldest leaves, and that diseases, herbicide injury, and environmental stress can cause similar symptoms.
Iron. Colorado State University Extension notes that iron shortage shows as yellowing between green veins, first on the youngest leaves. The iron in this product is chelated with EDTA, which keeps it in solution in mildly acidic conditions. University of Florida IFAS (HS1208) reports that EDTA holds less and less iron as pH rises, with only about 2.5% of the iron still chelated at pH 7.5, so keep your solution pH in the range your crop and system call for, and keep concentrates and reservoirs out of light.
Nitrogen. The label guarantees 2% nitrogen, as nitrate. Count it with the nitrogen in the rest of your nutrient program.
This describes calcium, magnesium, and iron nutrition in general; it is not a trial of this finished product.
Compare your options
Match the product to how you build your solution. Analyses for the other products are as shown on their pages.
Cal-Mag Plus 2-0-0 compared with other Greenway calcium, magnesium, and iron sources
Option
Supplies
Choose it when
Limitation
Cal-Mag Plus 2-0-0, this product
Calcium, magnesium, nitrate nitrogen, and EDTA-chelated iron together
You want calcium, magnesium, and iron in one liquid concentrate measured by the milliliter
Whole bags only; dosed by volume, with no ppm per milliliter on the label; reservoir use only
Cal-Mag Plus supplies calcium, magnesium, and iron. These products supply the rest of a nutrient program. Using them in the same program is not the same as mixing their concentrates together.
Grow Green 4-2-6, Micro Green 2-0-3, and Blossom Green 2-6-8: the other three parts of Greenway’s four-part system. Each is also dissolved from a bag into a concentrate; follow the amounts on each product’s page.
Same reservoir, separate concentrates. Add the Cal-Mag Plus concentrate to the reservoir water first and stir, then add each other product one at a time. Never pour its concentrate together with a concentrate that contains phosphate or sulfate. Check the final solution for cloudiness, EC, and pH.
Handling, storage & limitations
Hazards. Dust may irritate the eyes, skin, and airways. It contains calcium and magnesium nitrates, so the Safety Data Sheet says to keep it away from open flames, high heat, and combustible materials. Not for human or animal consumption.
Protective equipment. Wear nitrile gloves and eye protection when handling the powder, and chemical splash goggles when mixing the concentrate, as the Safety Data Sheet directs. Avoid raising dust, and wash your hands after handling.
Storing the bag. Store it at 55–75 °F and protect it from heat, light, and moisture, as the label directs. Do not use it if the seal is broken. Keep it away from food, feed, and drinking water, and out of reach of children.
Storing the concentrate. Keep it sealed, labeled, and in an opaque container. The Safety Data Sheet says to store it for up to 2–4 weeks and to discard it if it turns cloudy or forms a precipitate.
Spills. Sweep or vacuum up dry powder without raising dust, and keep it and any solution out of drains and waterways: nitrates can contribute to algae growth.
Use limits. Use it in nutrient solutions at the label rate. Never pour its concentrate together with concentrated phosphate or sulfate fertilizers. The Safety Data Sheet says not to apply it to forage or pasture crops.
First aid. Eyes: flush with clean running water for at least 15 minutes and get medical attention if irritation persists. Skin: brush off dry material and wash with soap and water for at least 15 minutes; get medical attention if irritation persists. Inhaled: move to fresh air. Swallowed: rinse the mouth and do not induce vomiting; if the person is conscious and alert, give 1–2 glasses of water, and contact Poison Control or get medical attention.
Emergency numbers from the Safety Data Sheet. CHEMTREC, 24 hours: 1-800-424-9300 (international +1-703-527-3887). Poison Control: 1-800-222-1222.
Frequently asked questions
What does Cal-Mag Plus 2-0-0 supply?
The label guarantees 2% nitrogen, all of it nitrate nitrogen, 3.2% calcium, 1.2% magnesium, and 0.1% iron, all of it chelated, derived from calcium nitrate, magnesium nitrate, and iron EDTA. It has no phosphate or potash and is not a complete fertilizer, so use it alongside a base nutrient that supplies those.
How do I mix it, and can I mix part of a bag?
Dissolve the whole bag at the label’s ratio of 25 lb per 10 gallons of water: 2.5 lb in 1 gallon, 5 lb in 2 gallons, 10 lb in 4 gallons, or 25 lb in 10 gallons. Warm, not boiling, water dissolves it fastest; stir until it is fully dissolved. The label says the entire package must be mixed and the bag must not be divided into smaller portions, so choose the bag size by how much concentrate you need.
How much do I add to my reservoir?
The label rate is 5 to 10 mL of the mixed concentrate per gallon of reservoir (it also prints 1 to 2 teaspoons), which is 1.3 to 2.6 mL per liter. Start at 5 mL per gallon: 100 mL for a 20-gallon reservoir. Dose the water you mix each time you fill or refresh the reservoir, and measure EC and pH afterward.
Why does it go in first, and can I mix it with my other nutrients?
In the same reservoir, yes, but not as concentrates. Calcium can combine with phosphates and sulfates to form insoluble precipitates, so never pour Cal-Mag Plus concentrate together with a concentrated phosphate or sulfate fertilizer, such as a 4-18-38, monopotassium phosphate, or Epsom salt stock. The Safety Data Sheet directs adding it to the water first. Stir, then add each other nutrient one at a time so they meet only when diluted. For an unfamiliar combination, jar-test it at the strengths you will use.
Do I need it if I use tap water?
It depends on what your water already carries. Reverse-osmosis and distilled water bring little or no calcium or magnesium, so the nutrients must supply them. Tap and well water vary; University of Florida IFAS notes that many Florida wells supply 40 to 60 ppm calcium, not all of it available to the crop. Ask your water utility for a report or have the water tested for calcium and magnesium, because an EC reading measures the total salts, not which minerals they are.
Can I use it with coco coir?
Yes, in the nutrient solution you water the coir with, at the label rate of 5 to 10 mL of concentrate per gallon. The label gives no rate for soaking or buffering coir before planting, so follow your coir supplier’s directions on whether it needs buffering.
Can I spray it on leaves?
Cal-Mag Plus is labeled for nutrient solutions, with no foliar rate. For blossom-end rot in particular, Clemson Extension reports that foliar calcium sprays are not effective, because calcium in the leaves cannot move to the fruit and the fruit skin cannot absorb it directly.
Will it stop blossom-end rot?
No fertilizer can promise that, and calcium cannot repair fruit that already has it. Blossom-end rot develops when developing fruit runs short of calcium, which reaches the fruit only with the water the plant takes up. Clemson Extension lists swings in moisture, rainy or humid and cool weather, low calcium, root damage, and excess ammoniacal nitrogen, potassium, or magnesium among the contributing factors. A steady calcium supply in the solution can help reduce the problem along with even watering and a healthy root zone.
How many ppm of calcium and magnesium does it add?
The label sets the dose in milliliters of mixed concentrate per gallon, not in ppm, and does not state how many ppm of calcium or magnesium each milliliter adds. If your recipe works in ppm, have your mixed concentrate or final solution analyzed, or build the calcium and magnesium from weighed single salts such as calcium nitrate and magnesium nitrate, whose pages give the ppm each gram adds.
How should I store the powder and the mixed concentrate?
Keep the bag sealed until you mix it, at 55 to 75 °F and protected from heat, light, and moisture, as the label directs. Keep the mixed concentrate in a sealed, labeled, opaque container, because the iron chelate breaks down in light. The Safety Data Sheet says to store the concentrate for up to 2 to 4 weeks and to discard it if it turns cloudy or forms a precipitate.
Related guides & articles
For this product, use the label directions, calculator, and documents on this page. For help fitting Cal-Mag Plus into your nutrient program, email questions@greenwaybiotech.com with your system, base nutrient, and water test.
Product documents & sources
Product label (PDF): the 25 lb package label (2018 label-review copy), with the guaranteed analysis and the mixing and dosing directions on this page.
Safety Data Sheet (PDF): composition, handling, storage, first aid, and emergency numbers. Version 1.0, April 2026.
Metals analysis (PDF): A & L Western Agricultural Laboratories, report dated August 28, 2018, on one sample of this product. Arsenic, lead, mercury, molybdenum, selenium, and cobalt were below the detection limits; cadmium was 0.07, chromium 0.4, copper 0.6, nickel 0.1, and zinc 5.29 mg/kg.
Where the rates and statements on this page come from
The mixing ratio, dose, and storage temperature come from the product label, and the composition, handling, concentrate storage, and first-aid statements come from the Safety Data Sheet, both listed above; the publications below supply the plant-nutrition and mixing context noted beside each, without evaluating or endorsing this product.
Not sure whether your water needs a calcium and magnesium supplement, or which bag fits your reservoir? Email your system, reservoir size, how often you refresh it, and your water test to questions@greenwaybiotech.com, or call (562) 351-5168, Monday to Friday, 9 AM to 3 PM Pacific, and we will work through it with you.
Every order carries a 90-day satisfaction guarantee, and we pack and ship from Madera, California. You can also choose a bag size from the size selector at the top of this page.
Greenway Biotech, Inc. is a family-owned company that has blended and packaged specialty fertilizers in California since 1989, today from Madera.
5 stars: 14 (82%)
4 stars: 0 (0%)
3 stars: 1 (6%)
2 stars: 1 (6%)
1 star: 1 (6%)
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BRADLEY JOHNSTON
Love cal mag dry concentrate
Dry concentrate that you rehydrate at home is the way to go for lower cost yet highly effective cal-mag. I highly recommend.
J
Jason Davis
Best CalMag
I have used allot of different calmags and this is the best and I love the pricing. Great company and fast shipping.
D
David Kwon
Great service and quality
Everything came as ordered and will be prepared to grow some of my own food.
R
Robert Kluttz
Open and leaking
It came quickly as usual, but this time it was open, had absorbed moisture, and was a leaking mess. The shipping container is an envelope, and the envelope was in bad shape. For as much as it costs, you’d think it would be packaged better. This will probably be my last order.
l
latifa wiley
Poor customer service
No getting back to customers when their promised order can't be filled. When placing my order over the phone with the same receptionist I told her its emergency to recieve in the 2 day ship. Waiting and waiting for order 2x now. Called back, receptionist sounds like she could care less about the business in which she should be representing, that's unfortunate. Suggested that the company send out an email when they are not able to fullfill orders when promised. I was told they would take it under consideration, Really! First order didn't arrive, same receptionist placed a replacement order, it never arrived either. So called back for the 3rd time, was told then one of the items was just that day being made. Really, so far I am not one but impressed, still waiting.
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Chase Griffith
Third time purchasing and it’s a really nice, clean, super affordable Cal Mag!
Love this brand of Cal Mag! I’ve used quite a few different ones, and this is the most cost effective that I’ve found!
Defiantly plan on future orders!
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Betty Hui
Cal Mag Plus 2-0-0 Concentrate 5 lbs
Product is great! Have used it to water my plants. My fern leaves are turning yellow, after water it with Cal Mag, the leaves turned green again the next day, amazing! Flowers have bigger blooms. Purchasing Cal Mag in powder form is more economical than in liquid form. Definitely will buy again and I have already recommended my friends to buy Cal Mag in powder form from Greenway Biotech.
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timm stoudt
APPLICATION WAS VERY SIMPLE WITH
APPLICATION WAS VERY SIMPLE WITH THE HELP FROM MCKENZIE-SHE HAS BEEN VERY HELPFUL OVERALL
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Mark B.
No more BER for my Tomatoes
Awesome
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Mary N.
Blossom rot
I’m hoping this works great for my tomatoes not to get blossom rot. I will see in a month or so when my tomatoes get bigger. It’s really inexpensive to treat my plants with this product. I spray my tomatoes and peppers with this solution as directed in the instructions.
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Curtis R.
Haven’t gotten my product yet!!
I haven’t received my product yet even after receiving an email saying that it had shipped. I check the FedEx status and it still says it is processing! I’m very frustrated! I need those nutrients!
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william g.
Great to buy from Fast
Great to buy from Fast Fast shipping Thank You also a great product.
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David D.
Not what I expected
Online information indicated this was a powder and it certainly is not. I ordered it with that impression and was disappointed when it arrived. It does not work for my particular application.
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Jim A.
Great Quality - Far More Economical Than Liquid CalMag
I’ve used this CalMag for 3 harvests so far. It works as good as any calmag I’ve ever used. Way more cost effective. I plan to use this as my only calmag. I mean, why would I not?
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Joshua F.
Superior customer service!!
The products were easy to mix using the directions on the website. It also gave recommended pH and ppm for the nutrient solution. They answered all of my questions and made me feel like a valued customer. I even received a handwritten "Thank You" note with my order!! We will be using Greenway for all of our nutrient needs.
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Ronald M.
So far, so good. Thanks
So far, so good. Thanks
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BLAINE B.
Looks like Cal/Mag
Time and plants will tell how good it is. Shipped Fast.
My MSM is decreasing my osteoarthritis pain, especially in my hands
My product arrived intact. I started taking it as soon as I went into the kitchen. I mixed it with my daily Metamucil, but there was no discernible taste. I am working on making it a habit each morning. The pain from my osteoarthritis, especially in my hands, is decreasing. I expect it to continue to improve. Thank you for my MSM.
You did not send me MSM Powder, you sent me Magnesium Chloride powder. I tried contacting you 3 times, by email & phone and you didn't have the courage & honesty to return my messages & rectify the situation. I even offered to text you a photo of the mag chloride.
