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🌱 Feed your plants like a pro—because thriving is the new standard!
FoxFarm Bush Doctor Cal Mag is a liquid calcium and magnesium supplement (3% Ca, 0.9% Mg) designed to prevent common nutrient deficiencies like blossom end rot and tip burn. OMRI listed for organic gardening, it features a 1-0-0 NPK ratio and is easy to apply with a simple 1 tsp per gallon weekly dose. Trusted since 1984, this formula supports strong cell walls and robust flowering, optimized for pH 5.6-6.8 soils.









| ASIN | B08SJ5HVZZ |
| Best Sellers Rank | #9,110 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #366 in Garden Fertilizers |
| Brand Name | FoxFarm |
| Coverage | pint |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,842) |
| Included Components | Application Instructions |
| Item Form | Liquid |
| Item Type Name | Cal-Mag |
| Item Weight | 1 Pounds |
| Liquid Volume | 1 Quarts |
| Manufacturer | FoxFarm |
| Mixing Ratio | 1-2 tsp per 1 gal |
| Model Number | FX17020 |
| Specific Uses For Product | Gardening |
| Target Species | Vegetables, Fruit-bearing plants |
| UPC | 752289520082 |
| Unit Count | 1.0 Count |
M**.
WONDERFUL!
Amazing, that's all I can say. One of my "plants" had randomly browning leaves - I disproved all possible causes, no bugs, no pests, not over or under watering - PH was on the money. All the others got exactly the same treatment, this was the only one with this symptom. I ordered Fox Farm's Cal Mag (as I am using the Fox Farm trio plus Fox Farm soil exclusively) plucked off all the brown leaves. When the order arrived, I mixed it as per instructions, I fed that plant and all others that had yet to flower. Only 3 brown leaves the next day, but the following day, none. Not only that but all the others grew several inches overnight and show signs of flowering. This stuff is GREAT!
R**Z
This stuff works
I recently started using Fox Farm Bush Doctor Cal-Mag Liquid, and it has quickly become an essential part of my plant care routine. This supplement, packed with calcium and magnesium, has made a remarkable difference in the health and vitality of my plants. From the very first application, I noticed my plants responding positively. The leaves became more vibrant and lush, and new growth appeared stronger and healthier. One of the things I appreciate most is how easy it is to mix and apply. The liquid blends smoothly with my usual nutrient solution, and it doesn’t cause any clogging or residue. I also love the peace of mind knowing that I’m giving my plants an extra boost of calcium and magnesium to support everything from strong cell walls to robust flowering. Whether you’re growing houseplants, vegetables, or flowering ornamentals, Fox Farm Bush Doctor Cal-Mag Liquid is a product I highly recommend. It’s reliable, effective, and a great way to keep your plants thriving all season long.
J**D
Exactly what my plants needed!
Exactly what my plants needed! I was seeing signs of tip burn and some spotting on the leaves—this Cal-Mag fixed it fast. Within a couple of feedings, my plants perked up, turned greener, and looked way healthier. I love that it’s easy to mix and helps prevent blossom-end rot too. Definitely a must-have if you’re growing in pots or using coco/hydroponics. Highly recommend!
A**R
Great product
Great product if using RO water on your plants
D**Y
Calmag
Seems to work as advertised
F**�
Bush Doctor is 5 stars
My plants ❤️ FF bush doctor cal/mag.
S**S
ALL NEEDED THROUGH GROW FOXFARM CAL - MAG USE IT⭐️⭐️⭐️⭐️⭐️
LOVE IT SOON AS YOU PUT IT ON TOP AMAZING
L**A
Good stuff
Came super fast and highly recommended!! Fox farms has amazing products
Trustpilot
2 months ago
3 days ago