Nutrient & pH

pH is a method of determining whether a solution is acidic or basic/alkaline. pH level is measured between 1-14. 1 being acidic 14 being alkaline. Pure water is 7 or neutral. The pH of your nutrient solution is very important. In order for maximum absorption of minerals the pH must be maintained at optimal levels which vary by plant species. Usually a level between 5.5 and 7.5 or around neutral.


I will not go into a lengthy discussion on pH as plenty of data is readily available.

pH can easily be measured with litmus paper and many other methods.

Electric pH meters are available, though they are a bit pricey. They do make testing incredibly easy


All you really need to know about pH is that it plays a vital role in your plant's ability to intake minerals. Maintaining a given pH balance is relatively easy. I've always been lucky by living in an area with constant supply of neutral tap water with pretty good buffering capacity. I have had to alter minimally, and in some cases add a buffering agent when a pH level was unattainable or a little stubborn. A buffering agent is just an additive which increases your solution's ability to hold a steady pH balance. Sodium bicarbonate (baking soda) is all you need, and small amounts can be added at intervals and tested until the desired level is obtained. Sodium bicarbonate can also slightly lower pH. Raising pH is always easier than lowering it, and commercially available chemicals are pretty cheap and easy to use. Citric acid can be used as a natural alternative to raise acidity. Lowering the pH can be a little difficult and takes a bit of time. Muriatic acid is often used to lower pH, but this is a very dangerous method. Phosphoric acid is the main ingredient in most pH lowing solutions and is safer and easier to use. Altering pH, either up or down, should be done in small increments with testing done in between. Always follow the directions on the label. Using a larger reservoir can also help keep a stable pH.