Plants that bloom in May in Zone 11 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.

Crossandra

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

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.

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.

Persian Buttercup

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

Pink Plumeria

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

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.

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.