I watered my potted blueberries from the tap all summer just to keep them going: by August, what was yellowing between the veins wasn’t thirst
Those yellow leaves with green veins running through them? Your blueberry isn’t thirsty—it’s drowning in the wrong kind of water. Municipal tap water’s hidden minerals are slowly poisoning your container blueberries all summer long, and by August the damage becomes impossible to ignore.