Late Summer

Plants that bloom in August in Zone 3 with purple flowers

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All Zone 3 plantsAll purple flowersAll August blooms
AsterPerennialAug-Nov
Aster
The grand finale of the garden season. Essential for fall pollinators.
Z3-8
AstilbePerennialJun-Aug
Astilbe
Feathery plumes that light up shady, moist spots like nothing else can.
Z3-8
Bee BalmPerennialJun-Aug
Bee Balm
Shaggy, crown-shaped flowers that hummingbirds fight over.
Z3-10
Bela Lugosi DaylilyPerennialJun-Aug
Bela Lugosi Daylily
Deep, near-black purple with a small yellow-green throat, the darkest and most dramatic daylily you can grow.
Z3-9
Caradonna SalviaPerennialMay-Aug
Caradonna Salvia
Dark purple stems set this apart from every other salvia. Vertical, architectural, electric.
Z3-9
Cat's Meow CatmintPerennialMay-Sep
Cat's Meow Catmint
Tidy, dome-shaped habit that never flops open. Stays compact without shearing.
Z3-9
CatmintPerennialMay-Sep
Catmint
Billowy lavender-blue haze that blooms all season if you shear it back.
Z3-10
ClematisVineMay-Sep
Clematis
The queen of flowering vines. Over 300 species, something for every spot.
Z3-10
CleomeAnnualJun-Sep
Cleome
Spider-flower with whisker-like stamens and airy blooms. Tall, dramatic annual that self-sows freely.
Z2-11
ConeflowerPerennialJun-Sep
Coneflower
Tough prairie native with long bloom season and medicinal history.
Z3-10
DahliaBulbJul-Oct
Dahlia
Endless forms from dinner-plate to pompom. The obsession of flower farmers.
Z3-10
DaylilyPerennialJun-Aug
Daylily
Virtually indestructible perennial with trumpet blooms in every warm hue.
Z3-10
Garden PhloxPerennialJul-Sep
Garden Phlox
Billowing clusters of fragrant summer color. A butterfly magnet.
Z3-8
Globe ThistlePerennialJul-Aug
Globe Thistle
Perfectly spherical steel-blue globes on white stems that dry to perfection. Bees are absolutely obsessed.
Z3-9
Golden Tiara HostaPerennialJul-Aug
Golden Tiara Hosta
Small, fast-spreading mound with chartreuse-gold margins and one of the easiest hostas you can grow.
Z3-8
ImpatiensAnnualMay-Oct
Impatiens
The shade annual champion. Flowers prolifically where nothing else will.
Z3-10
Joe-Pye WeedPerennialJul-Sep
Joe-Pye Weed
Towering native with mauve domes that butterflies swarm in late summer.
Z3-8
LiatrisPerennialJul-Sep
Liatris
Blazing star. Spikes that bloom unusually from top to bottom.
Z3-10
May Night SalviaPerennialMay-Aug
May Night Salvia
Perennial Plant of the Year. Dense indigo-violet spikes that rebloom if deadheaded.
Z3-9
MonkshoodPerennialAug-Sep
Monkshood
Deep indigo-blue hooded flowers on tall spikes in late summer. One of the few genuinely blue flowers that grows in shade.
Z3-7
Morning GloryAnnualJun-Oct
Morning Glory
Fast-climbing vine with trumpets that open fresh every morning.
Z3-10
Night Embers DaylilyPerennialJul-Aug
Night Embers Daylily
Deep burgundy-red with a black eye and yellow throat, smoldering in the summer border.
Z3-9
PetuniaAnnualMay-Oct
Petunia
Cascading color for containers and beds. Blooms nonstop until frost.
Z3-10
PickerelweedPerennialJun-Sep
Pickerelweed
Spikes of violet-blue flowers above glossy arrow-shaped leaves. Native pond and stream bank staple.
Z3-10
Powwow Wild Berry ConeflowerPerennialJun-Sep
Powwow Wild Berry Coneflower
Deep rose-purple petals and a bronzy cone on a compact reblooming plant that won't sprawl.
Z3-9
Purple de Oro DaylilyPerennialJun-Aug
Purple de Oro Daylily
Deep purple-red blooms on a compact Stella-sized plant. Brings rich color to the front of the border.
Z3-9
Purple Prairie CloverPerennialJun-Aug
Purple Prairie Clover
Brushy purple flower spikes rise over fine foliage and feed prairie pollinators.
Z3-8
SalviaPerennialMay-Sep
Salvia
Vertical flower spikes that hummingbirds and bees cannot resist.
Z3-10
SnapdragonAnnualApr-Sep
Snapdragon
Vertical flower spikes with squeeze-open blooms. Kids love them.
Z3-10
SpeedwellPerennialMay-Aug
Speedwell
Tidy spikes of blue that add vertical punch to the front of the border.
Z3-8
Sweet AlyssumAnnualApr-Oct
Sweet Alyssum
Honey-scented carpet of tiny flowers. The best living edging plant.
Z3-10
Vintage Wine ConeflowerPerennialJul-Sep
Vintage Wine Coneflower
Wine-purple petals that age to rose on a robust, well-branched plant. One of the most floriferous echinacea you can grow.
Z3-9
Wild BergamotPerennialJul-Aug
Wild Bergamot
The wild cousin of bee balm. Lavender puffs alive with pollinators. Tougher and more mildew-resistant.
Z3-9
ZinniaAnnualJun-Oct
Zinnia
Easy-grow annual with electric colors. Cut-and-come-again champion.
Z3-10
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