Perennials live for at least three yr , although some survive for much farseeing . Many perennial species die back to the ground in wintertime and regrow in the spring . To distinguish royal perennial , note their foliage , variant and blossom eccentric . purplish perennials bring deep to brilliant color to the landscape painting , and some species attract pollenate wildlife , such as hummingbirds , butterflies or bees , with their nectar . plant life species that blossom at different time duringthe growing seasonfor ceaseless color .
Early Bloomers
former blossom perennials start produce flowers in bounce , which lasts from March through May . Purple - flowering species let in the bugleweed weed ( Ajuga reptans ) , a 6- to 9 - inch - tall perennial that spreads as a ground covert . bugleweed weed efflorescence with small , regal , profane and white prime that stand on blossoming . Flowers have a fork humbled petal and draw bees . Turkish veronica ( Veronica liwanensis ) flower in recent spring with purpleness to blue efflorescence on tall racemes . The small blossoms grow from the bottom to the top . Turkish veronica grows to 2 feet tall and has lustrous , evergreen plant leaves . This perennial can be grown as a circulate primer coat concealment .
Summer Bloomers
The summer blooming time of year begins in June and last through August . The regal coneflower ( Echinacea purpurea ) produces empurpled , pink and white daisylike blooms with sullen gold center in summertime . The conflower ’s long - lasting peak grow from 2 1/2 to 5 inches in diameter and have 12 to 20 drooping petal . Purple coneflowers have rough leaf , hirsute stanch and grow from 1 to 3 foot magniloquent . Lavender ( Lavandula angustifolia ) bloom through the summer months with fragrant spikes of small , pale to deep purple blossoms . Lavender has aromatic , gray - light-green leaf and grows from 2 to 3 feet tall . It grow in upright clumps and has stippled leaves that turn silvery in winter .
Late Summer to Fall Bloomers
Late - blooming violet perennials grow flowers from August until September , though sometimes blossoms last until the first killing frost . Catmint ( Nepeta spp . ) blooms in late summer with marvellous ear of violet to gloomy prime . This congener of the catnip flora has fragrant flowers and foliage and produce from 12 to 36 inches tall . Russian sage ( Perovskia atriplicifolia ) heyday from July through October . This aromatic perennial grow tall spike of purple - blue peak and grow in an just grade . Russian sage grow from 36 to 60 inches improbable and has grey-headed - light-green , fragrant foliage .
Season-Long Bloomers
Some purple perennial flower for much of the uprise season . These include the creeping heliotrope ( Heliotropium amplexicaule ) , which flowers from summer through dusk . This spread industrial plant produces clusters of tiny , tublular , blue to empurpled efflorescence and grows from 6 to 12 inches tall . Bergamot ( Monarda hybrids ) blossom all summer long with purple , crimson or pinkish flower . This perennial ’s flowers have spiky , thin petals and erect stamens . Bergamot grows from 2 to 4 feet marvelous and attracts bees , hummingbirds and butterfly .
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