slightly lowering PH

Asked March 9, 2015, 5:50 PM EDT

I would like to lower the pH of my field I want to grow onions The pH currently is 7.1 Iwhat soil amendment should I use to bring the pH down to 5.7 to 5.8

Lane County Oregon onions lowering soil ph ammendments

3 Responses

To lower soil pH, add elemental sulfur. Like lime, sulfur is best added in the fall.
It is more effective to add it to an area before planting.

Here are a couple of more resources that may be helpful:
Nutrient Management for Onions in the Pacific Northwest

Acidifying Soil for Crop Production East of the Cascades - According to a table in this publication, the ideal pH for onions is 6.5 to 8.4. So if your pH is 7.1 you don't need to add sulfur.


Thank you so much for your answer and for the resource notation. Steve

You are very welcome. Hope the info is helpful for you and your onions.

All the best,