Richardin52":2jh2x1rh said:
Pine needles will make acid soils, so get a soils test but don't spend too much money on lime etc.
I believe, it more a case that pine trees LIKE and grow well in acidic soil, and you rarely see any pine (coniferous) forests in alkaline soil areas.
People over the ages, put 2 and 2 together and came up with 5, believing it is the pine and their needles that caused the acidic conditions, but the soil was already acidic or the pine forests wouldn't have been there to begin with. As far as I know, plants themselves do not have the ability to change the Ph of the soil they grow in or drop leaves on.
http://www.gardenmyths.com/pine-needles ... your-soil/