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Bloom City

Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, Quart (32 oz)

    • Based on 6,456 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, May 7
Order within 9 hours and 8 minutes
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Size: Quart (32 oz)


Features

  • Easy Mixing Directions: Simply add 2-5ml per gallon of feedwater, then water your plants as you normally would. A straightforward addition to your plant care routine, suited for all types of plants.
  • Nutrient-Focused Formula: This Cal Mag fertilizer contains calcium and magnesium that plants use for maintaining strong stems and vibrant leaves. Suitable for both indoor and outdoor use.
  • Adaptable for Different Growers: Whether tending to houseplants, outdoor gardens, or hydroponic setups, this CalMag for plants fits into a variety of growing conditions and plant care styles.
  • Supports Plant Nutrition: Many gardeners turn to Cal Mag for plants to help address nutrient needs, aiming to support consistent growth and leaf color, linked to calcium and magnesium intake.
  • Suitable for Growers of Any Skill Level: From beginners to experienced gardeners, this Cal Mag fertilizer is easy to integrate into any plant care routine, providing essential nutrients in an accessible format.

Brand: Bloom City


Item Weight: 32 Ounces


Item Form: Liquid


Coverage: Full


Liquid Volume: 32 Fluid Ounces


Package Dimensions ‏ : ‎ 8.98 x 3.35 x 3.23 inches; 2 Pounds


Date First Available ‏ : ‎ July 17, 2017


Manufacturer ‏ : ‎ Bloom City


Country of Origin ‏ : ‎ USA


Best Sellers Rank: #2,137 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #113 in Garden Fertilizers


#113 in Garden Fertilizers:


Customer Reviews: 4.6 4.6 out of 5 stars 6,456 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, May 7

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.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Good stuff not stinky like other brands
Size: Quart (32 oz)
This is a great calmag product. I like that it seems to stay fresher than other brands of cal mag that start to stink. It works as intended. Used in hydro vegetable kitchen gardening and outdoor hydro vegetables
Reviewed in the United States on January 21, 2025 by Biggielove
    • Great addition for my indoor plants
Size: Quart (32 oz)
Since I have softened water, I needed to add some Cal mag to limit calcium deficiencies in my indoor plants. This does the job. I'm satisfied with the results. So easy to use.
Reviewed in the United States on December 18, 2024 by funky mama
    • Helped save my sweet peppers and tomatoes
Size: Quart (32 oz)
Review Image by Connie Connie
This is a great product and I am an organic gardener, so was happy with the ingredients and the price was good as well 👍
Reviewed in the United States on October 27, 2024 by Connie Connie
    • Good price
Size: 1/2 Pint (8 oz)
Quality's product
Reviewed in the United States on November 7, 2024 by andrew king
    • This Cal Mag prevents blossom end rot on bell peppers in a week
Size: Quart (32 oz)
I have several bell pepper plants in a large square container. They are way too close so I will have to thin them out even though they are producing peppers. Blossom end rot started on several of the larger bell peppers. After using Cal_Mag and some liquid fertilizer it appears the rot has stopped appearing on new peppers. This container had some of my best soil mixture: worm castings, kelp meal, pearlite and some good container soil. Probably the PH is still a little off also. My other in ground raised beds have plenty of home kitchen compost so those tomatoes are blemish free and one cherry tomato is about 8 foot long now. ... show more
Reviewed in the United States on April 15, 2025 by Everglades
    • It seems to work well
Size: Quart (32 oz)
I'm a backyard gardener. This is the first year I remember getting blossom end rot on some of my tomatoes. Not all of them. But enough I sensed they could use some help. I used Cal Mag fertilizer with AgroThrive liquid fertilizer when I fed them which I use exclusively and it seemed to correct the newest fruit growing. We're in the middle of a 100 degree heatwave right now so the plants are all in survival mode and not producing much but they look like they will be okay once it's over. Maybe due to the shade cloth and Cal Mag Fertilizer. ... show more
Reviewed in the United States on September 6, 2024 by L. Nelson
    • Great for citrus trees.
Size: Quart (32 oz)
I used this on my indoor lemon trees. My trees were loaded with lemons for the first time ever!
Reviewed in the United States on April 5, 2025 by Autm88
    • product
Size: Quart (32 oz)
Just what I needed
Reviewed in the United States on April 6, 2025 by Wanda Hampton

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