OUTSIDE THE BOX:
Most varietals of hydrangea are in full bloom right now. You may have heard that the color of some species of hydrangea depends on soil pH. It does, but it's a little more complicated than that. This video, from Scientific American, explains the interaction between soil chemistry and bloom color in French hydrangeas (Hydrangea macrophylla). youtu.be/QEIzo1vzGiE
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