It’s a popular piece of garden folklore: Coffee grounds will change the color of hydrangea blooms, making them the dramatic blue many gardeners covet. The truth is more complicated, according to a ...

Hydrangeas are a garden favorite. Blue hydrangeas are in the same category as whale watching - elusive and spectacular. There are a few things we need to do to have blue hydrangea blossoms. First we ...

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Hydrangeas are exceptional in that the color of their flowers can change depending on the availability of aluminum ions. Available aluminum ions make the flowers blue. Aluminum ions are most available ...

Garden enthusiasts can keep their blue hydrangeas dazzlingly blue with a straightforward tip, say the pros. You might have snagged a blue hydrangea only to see it turn pink the following year, a shift ...

Before going any further, we should mention that not all hydrangeas are capable of changing color. The ones with this ability include some Bigleaf hydrangeas (H. macrophylla)—especially Mophead and ...