It all comes down to soil pH. There's an old gardening myth that you can turn hydrangeas blue by burying pennies or nails in the soil. Unfortunately, this particular wisdom isn't true, but there are ...

Closeup of the bright blue blooms of a mophead hydrangea - Kenwiedemann/Getty Images Hydrangeas are as fascinating as they are beautiful. The blooms of certain varieties act as a litmus test of the ...

Add Yahoo as a preferred source to see more of our stories on Google. Kritsada Panichgul It’s a popular piece of garden folklore: Coffee grounds will change the color of hydrangea blooms, making them ...

Hydrangea macrophylla (Bigleaf Hydrangea): This variety is most commonly affected by soil pH. It includes both Mophead and Lacecap types. The color change is most dramatic in these hydrangeas.