Plants that bloom in May in Zone 10 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.

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 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.

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.

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.

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.

Wonderful Pomegranate

Reliable cultivar bearing large red fruits and vivid orange flowers.