The color blue is said to have a special effect on gardeners inducing a feeling of calm. It is regarded as a peaceful and relaxing color that gives added depth to a flower bed.? There are some popular flowers that do not have a blue shade. For instance you can find roses and daylilies in almost any color you can think of other than blue. Apart from these two there are plenty you can grow as Greg Stack explains in an article which I found on the University of Illinois Extension website.
What is it about the color blue that drives gardeners into a state of euphoria? That magical elusive flower color is one that is sought out and also almost held to a different standard, said Greg Stack, U of I Extension horticulturist.
?If you look at the color blue from a psychological standpoint, blue brings to mind a feeling of calm and serene moments,? said Stack. ?It is thought of as a peaceful, relaxing color and when used in the garden, gives the garden the perception of added depth.?
Blue is also one of the least common colors found in flowers. Or is it? If you?re looking for that true blue rose or daylily, it?s going to be a while, if ever, before any of those show up. But if you want to include blue flowers in your garden now, there are plenty to choose from.
While many flowers are described as ?blue,? they often are really some shade of purpleviolet or red-blue or magenta. And there are plenty of people who will debate long and hard that the ?blue? that is there is not really blue. But that, as one would say, is in the eye of the beholder. So, when you are on your quest to gather up some ?true blue? flowers for you garden, know that there are really a number of good choices to pick from.
?With annuals we can start with ageratum,” he said.
?High Tide Blue? and ?Blue Hawaii? are two that will grow to eight to 12 inches tall and are great for full sun. They also draw butterflies. Another excellent dependable annual to put on your list is angelonia. ?Angie Blue?, ?Angelface Blue? and ?Archangel Blue? will provide snapdragon-like flowers in blue shades continuously all summer. Growing to 12-18 inches tall they prefer full sun.
For something different try Evolvulus ?Blue Daze.? These low growing plants are good for full sun and offer contrasting gray-green foliage.
For something tall as well as providing good cut flower material look to salvias. There are several good choices here. ?Mystic Spires Blue?, ?Rhea Violet?, ?Sally Fun?, ?Blue Emotion?, ?Black and Blue? and ?Oceana Blue.? Most all are two to three feet tall, prefer full sun and provide season-long color with long spikes of blue flowers.
See more at The University of Illinois Extension