What People Say. 1  David Bush and Jim Parsons Authors, Fair Park Deco Fair Park is one of the finest collections of Deco architecture in the country, but it is so much more: the embodiment of Texan swagger, it is a testament to the Texanic task of creating a dazzling spectacle in the darkest days of the Depression..
Hydrangeas turn blue as a reaction to aluminum in the soil. The soil pH should be slightly acidic (5.2 - 5.5). Do a soil test first, to determine your starting pH. Adding aluminum sulfate to the soil will help lower its pH, if necessary. A word of caution: not all plants can tolerate acidic soil and neighboring plants may be adversely affected.
Color in Base: Pinkish violet color. Approximate pH range for color change: 8.3 -10.0. (The color you see will be a mixture of the two.). Methyl Orange. Color in Acid: Red. Color in Base: Yellow. Approximate pH range for color change: 3.1-4.4. (The color you see will be a mixture of the two.). and more.