From Blue to Pink. If you have acidic soil—meaning your soil's pH is under 6.0—and you would like to change your hydrangeas ...

But if you’re looking to make a more permanent change to your hydrangeas, you need to focus on your soils acidity. A lot of soil around the D.C. region is clay based, alkaline soil with a higher pH ...

Pink. 4. Ask students: ... Note: The differences in color on the base side of the pH scale for universal indicator are not as obvious as those on the acid side. Students will have to look harder to ...