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Alkaline or Alkalinity

By , About.com Guide

The color of blue hydrangeas is dependent on soil acidity. These blue hydrangeas are the macrophylla

Hydrangea macrophylla will yield pink blooms in an alkaline soil, but blue flowers in an acidic one.

David Beaulieu
Definition: Soils with a pH level that is higher than 7 are said to be "alkaline." Such soils are suitable for growing plants that thrive in a "sweet" (alkaline) soil, as opposed to a "sour" or acid soil. If soil pH needs to be raised (i.e., the ground isn't alkaline enough), apply lime.
Common Misspellings: alcaline
Examples:
"Alkaline" refers to soil pH and shouldn't be confused with Al Kaline, who was the great right fielder for the Detroit Tigers during the '50s, '60s and '70s!

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