I have just harvested some of the ripest berries from a row of 6 blueberries of different varieties. They all have a slightly odd taste that I have never detected in store bought blueberries. It is difficult to describe. My wife suggested it almost tastes like a hint of basil, or some similar 'grassy' note. I have read they can taste sour if you pick them too soon, but I wouldn't call this a sour taste.
Is this possibly just what these varieties taste like? Unfortunately I don't have the exact names of them.
What could cause blueberries to taste like this? Could this be a soil, watering or fertilising issue?