Plants that bloom in September in Zone 9 with purple flowers

Anise Hyssop

Lavender-blue spikes with licorice-scented foliage. A pollinator powerhouse that blooms for months.

Bloom-a-Thon Azalea

Repeat-blooming azalea with waves of color spring through fall. Evergreen in mild climates.

Bougainvillea

Explosive cascades of papery magenta, hot pink, or coral bracts that smother walls, fences, and pergolas with nonstop color from spring through fall in zones 9 to 11.

Butterfly Bush

Long, arching flower wands that butterflies absolutely lose their minds over.

Calibrachoa

Mini petunias that bloom nonstop in hanging baskets. Dozens of color options and no deadheading needed.

Cat's Meow Catmint

Tidy, dome-shaped habit that never flops open. Stays compact without shearing.

Catmint

Billowy lavender-blue haze that blooms all season if you shear it back.

Chaste Tree

Long lavender-blue spikes cover this heat-loving shrub all summer. One of the few shrubs that actually blooms in August.

Cheyenne Spirit Coneflower

A rainbow mix of coneflower colors from a single seed strain. Every plant is a surprise.

Chrysanthemum

The fall icon. Mounds of color when everything else is fading.

Clematis

The queen of flowering vines. Over 300 species, something for every spot.

Cleome

Spider-flower with whisker-like stamens and airy blooms. Tall, dramatic annual that self-sows freely.

Coneflower

Tough prairie native with long bloom season and medicinal history.

Crape Myrtle

The tree of the South. Months of crinkled blooms and gorgeous peeling bark.

Dahlia

Endless forms from dinner-plate to pompom. The obsession of flower farmers.

Encore Autumn Azalea

Spring blooms plus a full fall encore. Multiple color options in the Encore series.

Endless Summer Hydrangea

Reblooms on old and new wood, so you get flowers even after a harsh winter. Color shifts with soil pH.

Hydrangea

Massive mophead blooms that shift color with soil pH. Showstoppers.

Ice Plant

Neon-bright daisy flowers that shimmer in the sun over succulent foliage. Thrives in hot, dry rock gardens.

Impatiens

The shade annual champion. Flowers prolifically where nothing else will.

Lantana

Multi-colored flower clusters that bloom relentlessly in brutal heat.

Liatris

Blazing star. Spikes that bloom unusually from top to bottom.

Morning Glory

Fast-climbing vine with trumpets that open fresh every morning.

Petunia

Cascading color for containers and beds. Blooms nonstop until frost.

Pickerelweed

Spikes of violet-blue flowers above glossy arrow-shaped leaves. Native pond and stream bank staple.

Polish Spirit Clematis

Deep violet-purple flowers cover a vigorous plant from midsummer to fall. Prune hard each spring and stand back.

Powwow Wild Berry Coneflower

Deep rose-purple petals and a bronzy cone on a compact reblooming plant that won't sprawl.

Rose of Sharon

A cold-hardy hibiscus shrub (Hibiscus syriacus) with big tropical-looking blooms in lavender, pink, blue, white, or wine, opening late summer when most flowering shrubs are done.

Salvia

Vertical flower spikes that hummingbirds and bees cannot resist.

Snapdragon

Vertical flower spikes with squeeze-open blooms. Kids love them.

Sweet Alyssum

Honey-scented carpet of tiny flowers. The best living edging plant.

Tall Verbena

Wiry stems topped with purple clusters that butterflies can't resist. See-through plant for layering.

The President Clematis

Big, rich violet-blue flowers with silvery reverse petals rebloom through the season on a vigorous, reliable plant.

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.

Zinnia

Easy-grow annual with electric colors. Cut-and-come-again champion.