Rhododendron cultivars with blue or lavender flowers are widely grown popular varieties include: Most native species come from east Asia and the Himalayan region, but they also hail from North America and Europe. Rhododendrons and azaleas are in the same family-both come in deciduous and evergreen varieties. It has a long flowering period, from June into early fall.
This cultivar typically grows to 6 to 12 feet, but heights of 15 feet are possible. Some experts recommend cutting the plant down to ground level yearly to keep it under control.
#BLUE AND PURPLE FLOWERS FULL#
If not planted in full sun, it can get weedy and sparse. It grows well, not requiring much maintenance beyond controlling its overgrowth. It grows best in USDA hardiness zones 5 to 9. Although it attracts butterflies and other pollinators, it is only a host plant for non-native North American butterflies and caterpillars, crowding out native host plants. around 1900 and is considered a weed or invasive plant in at least 20 states. The beauty of 'Blue Chip,' beyond its color, is that it is non-invasive.īutterfly bush originally came to the U.S. The Adonis Blue cultivar of butterfly bush is a true blue.Ī few cultivars of butterfly bush ( Buddleia davidii) have true blue flowers, such as 'Adonis Blue.' Others have misleading names, like 'Blue Heaven' and ' Blue Chip,' which are more of a lavender color than a true blue. The Spruce Home Improvement Review Board.‘May Night’ – grows 18 inches tall and wide, a standard in the green industry.‘Caradonna’ – grows 2 feet tall and wide, with much more narrow flower spikes than other cultivars.‘Blue Marvel’ – grows 1 foot tall and wide.‘Lyrical Blues’ – is an improvement on ‘May Night’ that grows 2 feet tall and wide.‘Salvatore Blue’ – grows 1 foot tall by 8 inches wide, making it the perfect plant for the flower border.One thing I dislike, at least about ‘May Night’, is that it needs deadheading in July to bloom the rest of the summer. One thing I like about perennial salvias is that they have few if any pest or disease issues. And there are lots of new cultivars showing up to the garden party. Perennial salvias attract hummingbirds, butterflies, and many bees to their purple flowers. But they have proven to be drought tolerant, long lived, and resilient plants. While many salvias are native to North America, these perennial salvias prized by gardeners in the Central great Plains and Midwest, are not. It is great in flower borders and butterfly gardens.Įven though there are many flower colors of salvia, such as mauve, pink, and white, the purple flowering cultivars standout, thanks to the standard cultivar ‘May Night’. ‘Walker’s Low’ – is a standard favorite, growing 18 inches tall by 4 feet wide.It grows 16 inches tall by 20 inches wide, perfect for borders and rock gardens. ‘Cat’s Pajamas’ – is a great newer cultivar, the 2021 Proven Winners Perennial of the Year.The purple flowers are visited by many bees, especially honeybees. ‘Purrsian Blue’ – grows 1.5 feet tall by 3 feet wide.‘Little Trudy’ – grows 1 foot tall and wide, great for rock gardens, fairy gardens, and borders.Because of the availability of new cultivars, gardeners everywhere are using them. Their silvery-gray green foliage paired with the sometimes white but usually purple flowers are great. While catmints are not native to the United States, they are widely used in landscapes. Very cold and heat tolerant, they love to be abused, but attract a great number of bees, butterflies, and other pollinators. They are great in flower borders with organic mulch or rock, and do not need to be irrigated once established. ‘Blue Fortune’ – grows 6 feet tall by 4 feet wide in zones 5 to 8.Ĭatmints have purple flowers, and they are one of the most widely used, drought-tolerant perennials.‘Little Adder’ – grows 1.5 feet tall and wide in zones 5 to 8.‘Blue Boa’ – grows 2 feet tall and wide in zones 5 to 8.There are a few moths that use this plant as a host, but the purple flowers are prized for attracting pollinators. Many of these are perfect additions to the garden. There are new cultivars of hummingbird mint coming out almost every year, now that plant breeders see their value. The purple flowers of eastern American species of Agastache are great for attracting hummingbirds, bees, and butterflies. And they are one of the toughest garden perennials. They grow in a wide variety of habitats, from deserts to woodlands. Native to North America, hummingbird mints come in a wide range of flower colors, including purple, orange, and red. Agastache ‘Blue Boa’ Hummingbird Mint ( Agastache species)
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