What do I add to my soil that is pH 8 to 8.5 to lower it to 7?

The overall soil readings are between 8 and 8.5. Existing plants are not thriving. I want to put in some new plants now so thought I would do a planting area 3 x size of root ball and mix 75% cow/compoost with the 25% existing soil. In the other areas I am thinking to try and lower pH chemically with Ammonium sulfate - is this the best option?


07 August 2012 02:25 AM

Hi Judy,

It is particularly difficult to lower the pH once the reading is over 8.4. However if the pH of the soil is about 8 or less, sulfur is the cheapest material to use. You can try Yates Soil Acidifier Liquid Sulfur. This product will correct and maintain the acidity of the soil. Please use it as directed. Adding cow manure and organic matter to the soil will help in improving organic matter.

Topics: General Advice Issues: Garden Jobs