What is the best organic way to lower the Ph of the soil so the blueberries
are happy.

Pine needles. Peat moss will do. Sawdust willtemporarily bind up the nitrogen.

Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)