Plants that bloom in May in Zone 9 with red flowers

Anemone de Caen

Poppy-like flowers in jewel tones bloom in mid-spring over ferny foliage.

Azalea

Explosive spring color in every warm hue. Acid-loving woodland classic.

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.

Calibrachoa

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

Clematis

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

Coral Bean

Bold spikes of tubular red flowers in spring attract hummingbirds before bean pods form.

Coral Bells

Grown mostly for dramatic foliage, but the tiny bell flowers are a bonus.

Coral Honeysuckle

Non-invasive native honeysuckle with brilliant coral-red tubular flowers that hummingbirds hover at for months.

Crossvine

Tubular orange-red trumpets line this vigorous semi-evergreen vine in spring, attracting every hummingbird in the neighborhood.

Dianthus

Spicy clove-scented pinks with fringed petals in pink, red, white, or salmon, one of the best long-blooming edgers and front-of-border perennials for sun.

Double Delight Rose

Creamy white petals blush to strawberry red at the edges. Knockout fragrance matches the looks.

Double Knock Out Rose

Fuller, double-petaled version of the Knock Out. Same bulletproof performance with more petal count.

Drift Rose

Groundcover rose that stays low and spreads wide. Tough, disease-resistant, and constantly in bloom.

Firecracker Penstemon

Spikes of scarlet tubular flowers that hummingbirds fight over. Southwestern native at its finest.

Hawaiian Hibiscus

Large tropical blooms in vivid colors appear repeatedly from spring through fall.

Honeysuckle

Tubular, nectar-rich flowers with a fragrance that defines summer evenings.

Impatiens

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

Indian Paintbrush

Bright red to orange bracts surround small flowers and glow across spring prairies.

Knock Out Rose

The rose that changed everything. Disease-resistant, self-cleaning, and blooms nonstop from spring to frost.

Lantana

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

Mandevilla

Glossy vines are covered in showy trumpet flowers from early summer to frost in warm climates.

Pelargonium

The classic window-box geranium. Ball-shaped flower clusters above scalloped leaves. Tough container staple.

Persian Buttercup

Ruffled, rose-like blooms in vivid colors brighten cool spring beds and pots.

Petunia

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

Plumeria

Intoxicatingly fragrant tropical blooms. The flower of Hawaiian leis.

Pomegranate

Brilliant orange-red blossoms in late spring and summer are followed by decorative, edible fruits.

Red Hot Returns Daylily

Brilliant red with a small yellow center, compact and one of the earliest daylilies to kick into rebloom.

Rose

The queen of the garden. Modern varieties are surprisingly low-maintenance.

Salvia

Vertical flower spikes that hummingbirds and bees cannot resist.

Snapdragon

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

Spirea

Flat-topped flower clusters on tidy mounds. The easiest flowering shrub.

Sweet Pea

Ruffled, intensely fragrant climbing flowers in every pastel shade. Cool-season annual that hates heat.

Wax Begonia

Glossy leaves and nonstop flowers in sun or shade. One of the most reliable bedding plants anywhere.

Western Red Columbine

Scarlet and yellow spurred flowers that hummingbirds follow through the Pacific Northwest's mountain meadows.

Wild Columbine

Nodding red-and-yellow spurred flowers that hummingbirds love on a self-sowing native that naturalizes along woodland edges.

Wonderful Pomegranate

Reliable cultivar bearing large red fruits and vivid orange flowers.