Plants that bloom in April in Zone 11 with white flowers

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.

Meyer Lemon

Sweetly scented white blossoms appear intermittently year-round and set thin-skinned lemons.

Persian Buttercup

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

Stock

Dense spikes of clove-scented blooms in soft pastels. Cool-season cut flower that fills a room with spicy perfume.

Sweet Olive

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

Sweet Pea

Ruffled, intensely fragrant climbing flowers in every pastel shade. Cool-season annual that hates heat.