Plants that bloom in May in Zone 10 with yellow flowers

Aeonium

Dramatic rosettes on woody stems. 'Zwartkop' variety has near-black leaves. Stunning in containers.

Angel's Trumpet

Huge pendant trumpets release intense evening fragrance over a long warm-season bloom.

Calendula

Bright daisy-like blooms in pumpkin orange and gold. Edible petals brighten salads and the plant keeps blooming through cool weather.

Calibrachoa

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

California Poppy

Golden cups that carpet hillsides across the state. Closes at night and on cloudy days.

Crossandra

Glossy leaves and asymmetrical apricot-orange blooms held in tight spikes. Firecracker flower, blooms steadily in heat that wilts other tropicals.

Daffodil

Cheerful trumpets that naturalize beautifully and return stronger each year.

Desert Marigold

Cheerful desert wildflower that blooms almost year-round in warm climates. Thrives on neglect.

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.

Iris

Elegant sword-leaved perennials with intricate, ruffled blooms.

Ixia

Wiry stems hold star-shaped flowers in jewel colors. Corn lily, a long-lasting cut flower that closes at night and opens with the sun.

Jasmine

A vigorous twining vine with intensely sweet-scented white or yellow star-shaped flowers, the scent of warm southern evenings.

Lantana

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

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.

Pink Plumeria

Clusters of pink, sweetly scented blooms cover this classic tropical tree in summer.

Plumeria

Intoxicatingly fragrant tropical blooms. The flower of Hawaiian leis.

Portulaca

Succulent-leaved sun lover with silky rose-like blooms that thrives where pavement, rock, or sand defeats everything else.

Pride of Barbados

Flame-orange and yellow flower clusters that hummingbirds and swallowtails cannot resist. Thrives on heat, dies back at frost, returns every spring.

Rainbow Knock Out Rose

Coral-pink single blooms with a yellow eye on the same indestructible Knock Out frame. Self-cleaning and disease-resistant like the original.

Rose

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

Snapdragon

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

Stella de Oro Daylily

The most planted perennial in America. Compact, reblooming, and basically indestructible.

Sunny Knock Out Rose

Bright lemon-yellow single blooms that fade to creamy white. The only Knock Out with real fragrance, and just as bulletproof as the rest.

Wallflower

Velvety blooms in burnished sunset tones with a sweet violet fragrance. The forgotten cottage staple worth bringing back.

White Plumeria

Highly fragrant white flowers with yellow centers appear in clusters on succulent branches.

Yellow Bells

Clusters of bright yellow trumpet flowers bloom for months in the heat. Southwest staple that takes drought and reflected heat without flinching.