Since most of our soil is acidic, these hydrangeas naturally are blue. To gradually change flower color from pink to blue, broadcast one-half cup of wettable sulfur per 10 square feet and water.

The bright blue flowers of Lobelia siphilitica brighten many perennial beds from July to late September or early October. This hardy native is a clump-forming perennial that sends up a stiff ...

There are more blue flowers out there than you might think; it’s just that our human eyes can’t make them out. Luckily for the plants, it isn’t human eyes they really have to worry about.

Love at first sight! The most common Scabiosa found in local nurseries has lavender-blue flowers and a ferny leaf. Scabiosa ...

Cool colors include shades of red with a blue tint, burgundy, rose, pink, blue, purple and lavender. Sticking with either warm colors or cool colors helps ensure a harmonious color scheme.