pH Up | pH Down

At Humboldt Nutrients we don’t currently manufacture conventional chemical pH up or pH down products, but several of our leading products are useful for raising or lowering the pH level of your garden.

Always ensure that you are monitoring of your pH level as often as you can. In hydroponic methods the pH range can change very rapidly unlike when you grow in soil. You will notice the changes in your plants quickly as well.

In a normal hydroponic system, keep the pH between 5.5 and 5.9.

Always maintain a pH level of 6 to 7.0 in an organic mixture.


Raising pH:


SIS.I can be used as a pH up alternative. Your plants will benefit from additional Potassium Silicate. The typical pH buffer solution ( Potassium Hydroxide and Potassium Carbonate) can add elements to your mixture that are not beneficial to your plants.

View Structural Integrety Product Info Page


Hum-BoltHum-Bolt is a natural pH up alternative for Organic Growers. Humic has added benefits to your medium than  Potassium Hydroxide and Potassium Carbonate.

View Hum-Bolt Product Info Page



Lowering pH:



FlavorFul is a natural pH down alternative for Organic growers instead of the typical Phosphoric acid solution.

View FlavorFul Product Info Page