Watch for deep purple-blue flowers on this annual salvia. It forms a low mound of frilly, green foliage dotted with blue blooms all season. This true blue color will steal the show in any garden. If you wait until the whole stem is wide open, blossoms shatter after drying. One of my favorite activities on a perfect summer day is to lie on the grass and look for shapes in the clouds with my daughter. This evergreen Agapanthus may be planted in the ground in the warm Winter climates of USDA zones 8-10, but it is best grown in containers in the St. Louis area where it is not Winter hardy. Luscious velvety textured flowers in the deepest shade of blue purple appear on vigorous plants that are well-suited for containers and landscapes. Part sun to sun. There are a handful of plants that I think everyone would agree are really, truly, blue-as-blue can be. This plant is the perfect thriller for large containers and a fantastic vertical element for landscapes. 2-4’ tall x 2-3’ spread. This annual species produces pure sky-blue flowers with yellow throats, making it just the eye-catching addition during its blooming period that can last from summer until frost. Superbena Royale Chambray is a vigorous, disease resistant variety that thrives in the heat. Well, we’ve found a fantastic option for you. 'Lobelia' is a flowering plant comprising of 415 species. Wild growing 'Lobelia' are geographically located primarily in tropical to warm temperate regions of the world. Ipomoea tricolor ‘Heavenly Blue’ Let these blue-hued friends roam wild—up a trellis, in a container, or wherever else in the garden you please. Also known as bachelor’s buttons. Part sun to sun. Part sun to sun. SUPERTUNIA® ROYAL VELVET Petunia 'Kakegawa S28' USPP 13,887, Can 1,039. Impress your neighbors with these luscious lilac blue blossoms as they cascade out of your window boxes, hanging baskets and patio containers. Delphinium is at the very top of that list and Lobelia is close behind. One of the few true-blue flowers, hydrangeas can change color based on the pH level of their soil. I suppose it is natural for things that are in short supply to be highly valued, and that is certainly true of blue flowers. You’ll love its clove-scented blooms that usher in the hope of spring. Darn near impossible! Unlike my husband, she isn’t colorblind, so I can’t chalk our differences up to that this time. There were some plants I would consider to be “cheater” blue plants rather than true blue, but she was adamant they were true blue. There are a handful of plants that I think everyone would agree are really, truly, blue-as-blue can be. Bright violet blue flowers emerge from purple calyxes which hold their color after the flowers are spent, giving the illusion of being in bloom over a longer period. Use it in containers where it will spill over the edges and in the front of landscape beds where its spreading nature will be shown to great effect. OK, I’ll agree—Laguna Compact Blue with Eye isn’t exactly a sexy name, but this plant truly is awesome. Its blue, star-shaped flowers can feel like a long, cool drink of water in your heat-blasted summer garden. Brachyscome iberidifolia bears blue, violet or white daisylike flowers on a bushy annual plant from mid to late summer into fall. Also known as Lily of the Nile, this beautiful flower features a deep green fleshy leaf and intense, purplish-blue flowers. Part sun to sun. H to 20 in (50 cm); S to 9 in (23 cm). To create an idea board, sign in or create an account. LAGUNA® DARK BLUE Lobelia 'USLOB0901' USPP 21,791, Can 4,076. It works as both a filler and a spiller in containers. Continuing with the theme of heat tolerance, let’s take a look at Beth’s Blue Isotoma. Delphinium is at the very top of that list and Lobelia is close behind. Cornflower ‘Classic Fantastic’ (Centaurea cyanus), Larkspur Blooms in Spikes of Summer Color, 22 Easy-to-Grow Annual Flowers That Thrive in the Shade, 40 Mind-Blowingly Beautiful English Roses, Easy Tips for Adding Beautiful Window Boxes, 10 Beautiful, Easy-to-Grow Climbing Roses for Your Garden. This article will give you ten beautiful ideas for blue flowering annual plants. 6-12” tall and 18-24” spread. ROCKIN’™ PLAYIN’ THE BLUES® Salvia ‘Balsalmispim’ USPP29,604. This can be one of the first things you plant in spring along with your pansies before the threat of frost has passed. Selected for its ability to handle the summer heat better than typical lobelias, this semi-upright plant is covered in flowers all season. Subsequently, it will also be one of the last plants to finish blooming in late fall. Photo By: Image courtesy of SelectSeeds.com, Photo By: Select Seeds Antique Flowers at SelectSeeds.com, Photo By: Shutterstock/Pilar Andreu Rovira. Endless Illumination will bloom all summer and while not truly trailing in habit, it will cascade over the edge of containers, creating a lovely waterfall of blue flowers. Blooms are held above divided gray green foliage. It is an ideal low-maintenance filler for hanging baskets, window boxes, combination containers and landscapes. Give your garden the blues with our collection of gorgeous blue annual flowers. Find locations near you that offer Proven Winners products. Even if you live in the correct zone, this flower is very hard to grow. Tip: It's easier to control pH levels in a pot, so consider planting your hydrangeas in containers if you're partial to a … To keep your petals blue, aim for a pH of about 5.2 to 5.5. Part shade to shade. Its deep blue flowers are highlighted by a large white eye. Plants grow 3 to 4 feet tall and flower continuously from summer until frost, providing plenty of stems for dried bouquets.