Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.
Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.
🌿 Unlock your garden’s full potential with precision pH mastery!
Humboldts Secret pH Down is a highly concentrated liquid phosphoric acid solution designed to rapidly and precisely lower pH levels in soil, coco, and hydroponic systems. Engineered for professional growers, it ensures optimal nutrient absorption by maintaining pH between 5.5 and 6.5, promoting healthier, more vigorous plant growth. Its versatile formula works across all growing mediums, delivering reliable, efficient results with minimal product use.
| ASIN | B0DFN2JDB2 |
| Best Sellers Rank | #33,515 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #955 in Garden Fertilizers |
| Brand | Humboldts Secret |
| Brand Name | Humboldts Secret |
| Coverage | Medium |
| Customer Reviews | 4.6 out of 5 stars 453 Reviews |
| Item Form | Liquid |
| Item Weight | 0.63 Pounds |
| Liquid Volume | 8 Fluid Ounces |
| Manufacturer | Humboldts Secret |
| Model Number | pHDown8oz |
| Number of Items | 1 |
| Target Species | plants, trees, flowers, bushes, lawns |
| UPC | 850058984438 |
| Unit Count | 8.0 Fluid Ounces |
R**N
Humboldt ph dn
Works great and I use less then other brands per feeding
R**H
This stuff is great!
The pH on my cannabis plants was at about 7 1/2 almost 8. They were not taking up nutrients like they should, which is obvious by their stunted growth and within one water and using pH down it… Problem solved! Perfect, 6.7 PH. All I did was mix my feeding solution take the pH, Then add pH down until the pH was at around 3 1/2 which I figured is half of the approximate 6 1/2 I was looking to get. And it got me there right on the line. The only problem with this product is there are no real directions. You kind of have to do trial by error and let me tell you folks please err on the side of caution. This is straight acid that will definitely burn your plants so do not apply this directly. Do not apply this in high doses. I would say start with a cap full in a gallon of your feeding solution and then go from there, adding more until you get to where you want to be. That said, I kind of understand why the directions are the way they are because every solution is a different pH, so there is no perfect amount. It’s always going to be based on your water quality and the pH of your nutrient base. At any rate, I will tell you that this product works absolutely great. I would avoid getting it on the plant itself and apply only to the soil. Happy growing.✌️🙏❤️🤩🌱🌳
B**6
Yep
As promised
S**N
Lowers Ph.
I use this to lower the Ph in my water prior to watering my plants.
S**S
Works well
Does what it's supposed to do
D**O
My go-to
Lowered my PH just like it said it would.
P**L
carful
I don't know what kind of Acid this is. I am not sure its legal. I tried a ph tester (cheap) and it pegged 00.00. not sure if my tester is to cheap but the point stands. STRONG
R**E
Quality product
Excellent product highly recommended!!!
G**Y
It's better to get this big 1 it works better than the smaller bottle.
Perfect for plant health and it works for meny grows .
Trustpilot
3 weeks ago
2 days ago