The pH of Some Commonly Grown Plants Using Hydroponics

In the previous post I was asked about the best pH, well as usuall my answer is it depends on what you are growing.  Below are some nutrients that 'drop out' at various pH's and a few common plants I have grown indoors and their recomended pH growing hydroponically, the pH may need to be different if growing in soil or other mediums.


pH values above 7.5 cause iron, manganese, copper, zinc and boron ions to be less available to plants.
pH values below 6 cause the solubility calcium and magnesium to drop.
pH values between 3 and 5 and temperatures above 26C encourage the development of fungal diseases.


Good Growing and

Happy New Year!

Plant     Optimal  pH Range
Beans        6.0-6.5
Broccoli   6.0-6.5
Cabbage   6.5-7.5
Carrots     5.8-6.4
Chives      6.0-6.5
Garlic      6.0-6.5
Lettuce     6.0-6.5
Onions     6.5-7.0
Peas         6.0-6.8
Pineapple 5.0-5.5
Radish     5.6.-7.0
Strawberries  5.6.-7.0
Tomatoes  5.5-6.5