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The Agro pH reducer from Puerto Verde is a liquid product that lowers the pH of irrigation water when it is too alkaline. Irrigation water with a pH outside the optimal range blocks roots from absorbing nutrients, even if the soil or growing medium is well fertilized. By correcting the pH of the water before irrigating, your crop can make much better use of any fertilizer you use, including our magnesium sulfate.
Why is irrigation water pH so important?
Each nutrient in the soil is only available to plant roots within a specific pH range. When irrigation water is too alkaline (high pH), many nutrients—iron, manganese, phosphorus, and magnesium—become "locked" in the growing medium, and the plant cannot absorb them even if they are present in sufficient quantities. The result is nutrient deficiencies that persist no matter how much you fertilize, because the problem is not a lack of nutrients, but rather that the water prevents the plant from using them.
The Agro pH reducer corrects this by lowering the pH of the water before irrigating, bringing it into the range where most nutrients are available to the roots.
When do you need to lower the pH of your irrigation water?
- Your water pH test shows a reading above 7.0 using test strips or a digital meter
- Your plants show nutrient deficiencies despite regular fertilization
- You notice white limescale deposits on drippers, sprinklers, or the edges of plant pots
- You irrigate with very hard mains or well water, typical of areas with limestone soils
- You work with fertigation or hydroponic systems, where pH control is especially critical
- You are starting a new growing season and want to begin with irrigation water in optimal condition
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Why choose the Agro pH reducer from Puerto Verde?
How to apply the Agro pH reducer step by step
- Measure the water pH: use test strips or a digital meter before irrigating or preparing your fertigation solution.
- Calculate the dose: follow the instructions on the label according to the volume of water and the required pH reduction.
- Add the dose to the irrigation tank: add the product to the water, never the other way around, and stir well to ensure it mixes evenly.
- Measure again: check that the pH is within the desired range before irrigating or injecting it into the fertigation system.
- Adjust if necessary: if the pH is still high, add another small dose and measure again, rather than adding a large dose all at once.
What range should irrigation water pH be in?
The optimal range varies slightly depending on the crop, but as a general guide:
| Irrigation water pH | Nutrient availability |
|---|---|
| <5.0 | Too acidic; may limit some nutrients |
| 5.5–6.5 | Optimal range for most crops |
| 6.5–7.0 | Acceptable, although some nutrients begin to become limited |
| >7.0 | Alkaline: iron, manganese, and phosphorus become less available |
Each crop has its own specific range; consult the recommendations for your case and measure regularly.
Frequently asked questions about the Agro pH reducer
What exactly is the Agro pH reducer used for?
How often should the water pH be measured and corrected?
Is it the same as the pH reducer used in swimming pools?
Is it compatible with drip irrigation and hydroponics?
Can I combine it with magnesium sulfate?
Where can I learn more about naturally caring for my crops?
Where can I buy the Agro pH reducer online in Spain?
Learn how to naturally care for your crops
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