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🌱 Unlock your garden’s secret weapon for unstoppable growth!
Humboldts Secret CalMag & Iron is a premium 32 oz liquid fertilizer delivering calcium, magnesium, and chelated iron to prevent nutrient deficiencies and enhance plant health. Designed for all growing mediums including soil, hydroponics, and coco coir, it supports vigorous vegetative growth, rapid recovery, and superior fruiting performance. Trusted by over 2,000 growers with a 4.6-star rating, this formula ensures maximum mineral absorption and balanced nutrition for thriving indoor and outdoor gardens.
| ASIN | B01GB23TEY |
| Best Sellers Rank | #13,701 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #410 in Garden Fertilizers |
| Brand | Humboldts Secret |
| Brand Name | Humboldts Secret |
| Coverage | Medium |
| Customer Reviews | 4.6 out of 5 stars 2,083 Reviews |
| Item Form | Liquid |
| Item Highlight | Calcium, Magnesium & Chelated Iron Formula, Prevents Nutrient Deficiencies, For Soil, Coco, Hydroponics & RO Water, Easy Mix |
| Liquid Volume | 32 fluid ounces |
| Manufacturer | Humboldts Secret |
| Mixing Ratio | 1-2ml:1000ml for vegetative growth and 2-5ml:1000ml for flowering |
| Model Number | 15195521384514 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | TUEEQE-09 |
| Specific Uses For Product | Hydroponic |
| Target Species | Plants |
| UPC | 648260730390 |
| Unit Count | 32 Fluid Ounces |
K**R
Awesome product
Awesome stuff, Gonna make it an amazing season!!
N**P
Please help me with my light , my Tatu 1000W LED Grow Light
Like
K**O
Quickly shows improvement to my house plants. Good company
Had some confusing instructions but their customer service got back to me quickly and cleared confusion. The jug arrived with no leak, has no order and my house plants are happy to get the dose of this fertilizer, especially my old lemon tree which goes out in summer and come in for winter. I notice when plants are healthy not many bugs appear. as it takes very little per gallon of water, it's a good value for the price.
M**Y
Nice
Works good
H**O
Plants
Good cuality
A**M
It works!
Worked just as promised. Got rid of the yellowing caused by chlorosis and the leaves on my grapevine are green and healthy again! Took only 2 days to see significant results! Thank you!!!
D**.
It came highly recommended by AI
Actually I don't even know if it's helping yet it takes a while I guess
J**7
This stuff WORKS!!
This stuff is great! My pepper plants were turning yellow and had blossom end rot so they were getting a lottlw rotten hole before they were even ready to pick. I read online that several ppl recommended this for that problem. It was like a miracle, I used it twice and my plants turned green again and the peppers started growing perfectly! I kept using them as recommended and got so many beautiful peppers from my plant all summer! Life saver! Plus it is so concentrated, you only use about a cap full with a gallon of water so it will last FOREVER!
Trustpilot
2 weeks ago
1 day ago