Blueberries producing fewer berries
We have a blueberry patch that we've had for over 30 years (photo attached). The bushes are 4-6 feet tall. Over the past 4-5 years they have been producing fewer and fewer berries. The soil is well drained and we had mulch (about 6") annually. I have not run a soil pH, but they've been in the same place and always produced well until recently. Any thoughts?
Anoka County Minnesota
Blueberry plants are very long lived. Check the pH of your soil. The pH may have risen over time. Top dress around the base of the bushes with elemental sulfur each year to reduce the pH. http://www.extension.umn.edu/distribution/horticulture/dg3463.html http://www.sustland.umn.edu/implement/soil_ph.html