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๐ฟ Elevate your garden game with the pure power of Cal-Mag!
Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer is a premium liquid supplement designed to prevent calcium and magnesium deficiencies, promoting strong, vibrant plant growth. Suitable for both soil and hydroponic setups, its ultra-pure formula ensures efficient nutrient uptake without clogging systems. Trusted by thousands with a 4.6-star rating, this 8 oz bottle delivers precise dosing for all growth stages, making it a must-have for serious gardeners.












| ASIN | B08JHFG5GH |
| Best Sellers Rank | #3,309 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #170 in Garden Fertilizers |
| Brand Name | Bloom City |
| Coverage | Full |
| Customer Reviews | 4.6 4.6 out of 5 stars (6,806) |
| Item Form | Liquid |
| Item Weight | 8 Ounces |
| Liquid Volume | 0.5 Pints |
| Manufacturer | Bloom City |
| Mixing Ratio | 2-5 mL per gallon |
| Specific Uses For Product | Organic |
| Target Species | plants |
| UPC | 841401125691 |
| Unit Count | 8 Ounce |
J**W
Best plant fertilizer
Iโve been using the Bloom City Professional Grade Ultra Pure Cal-Mag (32 oz) for my plants, and Iโm very impressed with the results. Itโs made a noticeable difference in overall plant healthโespecially with preventing calcium and magnesium deficiencies that can show up as yellowing leaves or weak growth. The formula is clean and easy to mix, and a little goes a long way. Iโve used it with both soil and hydro setups, and it works great across the board. My plants look greener, stronger, and more vibrant since adding this to my routine. Another big plus is that it doesnโt cause buildup or clogging in my system, which Iโve had issues with in the past when using other brands. If youโre growing vegetables, houseplants, or anything that needs that extra nutrient boost, this is definitely worth trying. Reliable quality and consistent results. I'll be buying again!
G**E
Great for correcting nutrient deficiencies
This is the only general micronutrient supplement I ever buy. I first got it when my younger plants started showing signs of nutrient deficiencies outside of NPK nutrients. My plants showed signs of recovery after one watering and a few foliar applications. Some people might not need it, especially if they are growing in properly enriched soil, but I have water that's softened at a municipal level. As a result, some minerals have been removed from my water; this product helps restore those and add others that are good for all plant growth stages, from new plants to blooming plants. Use is simple. Just measure out however much I want to add to my 2-gallon can, dump it in, add water, and water my plants as usual. No worrying about presoaking anything or lots of stirring to mix in powders. (for simplicity, I use a different fertilizer bottle's cap to measure out ~8ml when filling my watering can) The bottle cap/lid and recommended measurements have changed from the previous bottle I bought. The ingredients list is the same, as well as the concentration percentages of the minerals. They also separate the use guidelines/directions differently between them. I'll only mention the amount differences. New: watering can: 1tsp (2.5-5ml)/gallon Hose end sprayer: 1tsp (5ml) approx 1:750 ratio Foliar spray: 2-4tsp (10-20ml)/gallon Old: Grow phase: 2-4ml/gallon Bloom phase: 3-5ml/gallon Sprayer instructions: 20-40ml/gallon Not sure why they changed the amounts, but it's helpful to know the ratio for using with a hose end sprayer. Overall, great value for money in my opinion.
R**Y
Great product great customer service
Great stuff.Great price would buy it again over and over again.Very good customer service is excellent.Not like athena
A**R
Noticeable difference in a couple days.
This stuff works well. I noticed a significant increase in my plants health and size after about 2 days. It gave my plants a healthy green vibrant look. My only complaint is with whoever shipped it. It had a seal but was missing the lid. Luckily, the lid from my bai drink bottle ended up fitting perfectly.
J**N
Chefs choice
This stuff is strong, reliable and never runs out. It's a rather large bottle.
M**Y
Calcium magnesium fertilizer
I grow bell peppers and other types of peppers in my garden. Sometimes they need calcium and magnesium to fertilize them or they start getting the source fights on them. I decided to try this one to see if it would work. I use this and within a week, my plants perked up really well. The pepper started looking very nice and green and healthy. Iโm very satisfied with this product. I would suggest this for anybody this fertilizer is good quality itโs effective and being organic makes it even better.
W**R
Works as advertised
I initially got this for my raised garden tomatoes. When I noticed my bell pepper plants in growbags were experiencing end rot, I used this on them. Probably 2 doses in a month. From that point forward, it cured the end rot in the new bells. Seemed to act quick and I haven't had the need to add anymore this season. This was great to have on hand. Would order again.
A**R
Good brand of stuff
Perfect no problem.
Trustpilot
2 weeks ago
5 days ago