Plants that bloom in March in Zone 9 with red flowers

Anemone de Caen

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

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.

Camellia

Glossy evergreen with rose-like blooms in the depths of winter.

Coral Aloe

Flat coral-orange rosettes produce vivid flower stalks in late winter. One of the hardiest aloes.

Hawaiian Hibiscus

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

Persian Buttercup

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

Red Flowering Currant

Among the first shrubs to bloom in Pacific Northwest gardens, dripping with rosy-pink racemes that hummingbirds arrive for before anything else has opened.