How To Magically Change The Color Of Your Hydrangeas вђ Artofit Apply the powder form of lime to the plant’s base in april, and again in october. the ph of the soil will be raised by garden lime. this prevents your hydrangea from utilizing the aluminum, which enhances both the reds and the pink blooms. you can opt to add dolomitic lime to the base of the plant and water it in. Add aluminum sulfate to the soil. aluminum sulfate is a chemical you add to your soil to reduce the ph levels, and this makes the hydrangeas change colors. it's especially helpful if you have pink hydrangea flowers and want to turn the color to a bright blue. however, if you expect a fast color change, you may be disappointed.
How To Magically Change The Color Of Your Hydrangeas вђ Artofit 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 from blue to pink, add garden lime, which is found at most local nurseries, or wood ashes to your soil, mcenaney says. this will make your soil more alkaline. Changing the ph – how to change the color of hydrangea blooms. as mentioned earlier, the color of a hydrangea’s blooms relates directly to the soil’s ph. the colors can range a bit due to the variety, but in general, if your soil is more acidic and registers between 4.5 to 6.0, your hydrangea will bloom from deep blue to purplish pink. Condon explains that to achieve blue blooms, you must have soil that is decidedly more acidic with a ph lower than 5.5. alkaline soil with a ph of 7.0 or above generates pink and red blooms. 3. reapply the lime every 3 4 weeks during the growing season. continue conditioning your hydrangeas throughout the spring and summer months while they’re still actively growing. you should begin to witness a gradual change in color after several weeks or months. when you do, the effects will be quite stunning.
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