Garden and lawn PH levels
My lawn and garden have a high PH levels but nitrogen phosfeous and pot ash are low. What the best way to correct this problem?
Wayne County Michigan
If you used a homeowner soil test available at garden centers you will need to get an actual laboratory soil test done in order to be able to calculate how much phosphorus and potassium to add. http://msue.anr.msu.edu/uploads/234/42589/garden/Soil_test.pdf This is also important since Michigan outlawed the sale of phosphorus containing lawn fertilizer in 2010 unless you have an official soil test showing a deficiency in phosphorus. http://msue.anr.msu.edu/news/new_phosphorus_fertilizer_amendments
You can obtain a soil test here: www.msusoiltest.com
Lawns need a pH over 6.0 so a high pH is usually not a problem. Gardens usually need a pH of between 6.0 and 6.5 so it is important to get an actual pH value in order to know if any action is necessary. You can do a composite sample from the lawn and garden and then just change the crop type on the interpretation page to get the appropriate recommendations for both the lawn and garden.