1. Color Change in Hydrangeas According to pH level nostalgichome.wordpress.com

2. HYDRANGEAS?? Hydrangea macrophylla is a the species of hydrangeas more commonly known as ‘bigleaf’. The Bigleaf Hydrangea: Can be found in local gardening centers Is a common decorative plant Grows best in morning sun & afternoon shade Produces blooms that are pink, blue, or a mixture of both.

3. Blue or Pink? Aluminum is the variable which changes the pH level in soil. The presence of aluminum lowers the pH level (blue blooms), while the lack of aluminum keeps the pH level higher on the scale (pink blooms). pH 5.0-5.5pH 5.5-6.5pH 6.5+

4. SETUP Left: Base - Pink - Dolomitic Limestone Center:Control - Pink & Blue Right:Acid - Blue - Aluminum Sulfate

5. METHODS→ MATERIALS ↓ 1.Sun and shade 2.Record pH levels 3.Water with solutions 3 Hydrangeas (pink) pH Meter Dolomitic Limestone Aluminum Sulfate Tap Water www.gandermountain.com/

6. Changes of pH Level in Soil 8 Weeks

7. Final Results  Left is the acidic (blue) right is the alkaline (pink). Control plant has both blue and pink blooms. →

8. Sources Cited 1 King, Judith. "Changing the Color of Hydrangeas." All About Hydrangeas. Web. 2 Mar 2010.. 2 King, Judith. "Planting and Transplanting Hydrangeas." All About Hydrangeas. Web. 2 Mar 2010.. "Solutions." Modern Biology. Austin: Holt, Rinehart, and Winston, 2005. Print. "pH Preferences of Plants." GreenTerraFirma.com. 2007. Web. 3 Mar 2010.. "Life of the Garden Party." Southern Living. May 2010: 78-83. Print.