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Play scientist with your hydrangeas! What a cool experiment to do.
- Know you can only change the color of a bigleaf hydrangea
- Find out your soil’s PH.There are plenty of kits you can purchase at your local gardening center or nursery.
--If you find you have acidic soil—meaning your soil's pH is less than 6.0—and you would like to change your hydrangeas from blue to pink, "add garden lime, which is found at most local nurseries, or wood ashes" to your soil.
--With alkaline soil—meaning you have soil with a pH of 6.0 or more—you can change your plant from blue to pink by adding a soil acidifier or aluminum sulfate, both of which can be purchased at your area garden center.