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.
Hydrangeas are great to plant because you can change the color of their flowers by changing the acidity of the soil. Here's an instructional video on how to change the color of your hydrangeas. Show transcript Hide transcript. Hi, I'm Dave Ethepare with Dennis' 7 Dees Landscaping and Gardening Centers in Portland, Oregon, with About.com.