Plants that bloom in July in Zone 4 with blue flowers

Anise Hyssop

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

Blue Fescue

Steel-blue tufted mound. Perfect edging or rock garden accent.

Blue Flax

Delicate sky-blue flowers open each morning on airy stems over fine foliage.

Blue Oat Grass

Compact clumps of steel-blue blades provide year-round color and texture.

Borage

Star-shaped electric blue flowers that bees go absolutely wild for. Self-sows freely.

Campanula

Open, nodding bells in clear blue on tall graceful stems. Self-sows into refined cottage garden drifts.

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.

Clematis

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

Delphinium

Towering spires of true blue. The tallest, most dramatic back-of-border plant.

Endless Summer Hydrangea

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

Globe Thistle

Perfectly spherical steel-blue globes on white stems that dry to perfection. Bees are absolutely obsessed.

Japanese Iris

Huge, flat, ruffled blooms up to 10 inches across. Needs consistent moisture, especially during bloom.

Morning Glory

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

Mountain Bluebell

Sky-blue bell flowers on tall arching stems along mountain streams. The showy western cousin of Virginia Bluebell.

Native Spiderwort

Three-petaled flowers in blue-purple open fresh each morning on a tough native that blooms for weeks and seeds freely.

Pickerelweed

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

Rocky Mountain Columbine

Large blue-and-white spurred flowers bloom in late spring above lacy foliage.

Rocky Mountain Penstemon

Spikes of deep blue tubular flowers rise above glossy evergreen foliage in early summer.

Russian Sage

Airy lavender clouds on silver stems. Thrives in heat and poor soil.

Salvia

Vertical flower spikes that hummingbirds and bees cannot resist.

Sea Holly

Metallic blue bracts and cones turn the whole plant a vivid silvery-blue. Otherworldly and completely drought-proof.

Speedwell

Tidy spikes of blue that add vertical punch to the front of the border.

The President Clematis

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

Walker's Low Catmint

Perennial Plant of the Year. Billowy lavender-blue spikes that rebloom hard after a shear.