Plants that bloom in April in Zone 11 with yellow flowers

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.

Persian Buttercup

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

Sweet Olive

Small clustered flowers perfume the garden with an apricot-like scent over a long season.