CalMag + Iron Plant Supplement (32 oz) Quart | Concentrated Calcium Magnesium Iron for All Plants & Gardens | Makes Up to 315 Gallons | Prevents & Corrects Blossom End Rot | Blue Planet Nutrients
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Availability:
Only 3 left in stock, order soon!
Arrives
Friday, Sep 26
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Size: Quart
Features
- CORRECT & PREVENT DEFICIENCIES: Feed CalMag to your plants as needed to prevent and correct common deficiencies such as blossom end rot and upward leaf curl.
- CALCIUM, MAGNESIUM, IRON SUPPLEMENT: CalMag provides plants with calcium, magnesium, and iron which are key elements in photosynthesis, absorption & transport of nutrients within the plant, and are vital to the healthy development of all varieties of plants.
- VERSATILE FORMULA: Can be fed to all varieties of plants growing in almost any type of garden such as hydroponic, soil, aeroponic, and all soil-less media! Blue Planet Nutrients CalMag supplement can be used along with other garden fertilizers and supplements.
- EASY TO USE: Simply dilute a small amount per gallon of water and water your plants! CalMag can also be used as a foliar spray and as a soak for coco coir prior to use as a hydroponic growing medium.
- BLUE PLANET NUTRIENTS: Trusted brand from Houston, TX providing high quality, professional grade garden fertilizers and supplements since 2010.
Brand: Blue Planet Nutrients
Item Weight: 32 Ounces
Item Form: Liquid
Coverage: Medium
Liquid Volume: 32 Fluid Ounces
Is Discontinued By Manufacturer : No
Product Dimensions : 5.25 x 2.4 x 7.5 inches; 2 Pounds
Date First Available : September 12, 2016
Manufacturer : Blue Planet Nutrients
Best Sellers Rank: #84,420 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #1,836 in Garden Fertilizers
#1,836 in Garden Fertilizers:
Customer Reviews: 4.7 4.7 out of 5 stars 1,775 ratings
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Sep 26
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Reviewed in the United States on June 8, 2025 by JAMES
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The media could not be loaded. Works extremely well at correcting or preventing calcium magnesium or iron deficiencies I use it daily and have been using it for years same company same product and have not been disappointed not even once this stuff is amazing not only that but it corrects the problem fast and is fairly cheap!
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Reviewed in the United States on May 8, 2024 by Chris beck
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I can't believe the plastic jug was sent in a paper envelope. The cap was cracked and leaking, fortunately I had the previous empty container. What was there shipping department thinking. As for the product itself it looks and smells the same as any brand that I've used in the past. I guess only a spoon full of the liquid was lost. No tremendous loss. As for the performance it's to early to tell.
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I make my own plant food mixtures with liquid seaweed for my indoor and outdoor plants, as well as supplementing my AeroGarden veggies for continued growth. This gave me tasty cherry tomatoes for 200 days on my kitchen counter. Now I'm growing herbs, lettuce, and chilies with continuous growth. Very happy. A little bit goes a long way! My houseplants also grow well with these nutrients and I'm looking forward to spring to start my garden outside again. It did wonders for my veggies outdoors. They continued to grow until our first snowfall.
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Worked great reviving my citrus orange tree that started to yellow from nutrient deficiency. While I use Epsom salt as a foliage and in ground supplement, it did not do enough to make my leaves green again. When I found this I was hoping the iron or calcium would help and it did! Never figured out which specific nutrient it was deficient in but def did the job.
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I was having issues with blossom rot ( I believe that’s the proper term) on my tomatoes and bell peppers. It seemed to start working but unfortunately I had some pesky squirrels and bunny’s come in and destroy my garden. So I didn’t fully get to experience this but a few I got off the plant before it got destroyed seemed a lot better.
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