Plants that bloom in October in Zone 10 with lavender flowers

Butterfly Bush

Long, arching flower wands that butterflies absolutely lose their minds over.

Dahlia

Endless forms from dinner-plate to pompom. The obsession of flower farmers.

Impatiens

The shade annual champion. Flowers prolifically where nothing else will.

Petunia

Cascading color for containers and beds. Blooms nonstop until frost.

Rose of Sharon

A cold-hardy hibiscus shrub (Hibiscus syriacus) with big tropical-looking blooms in lavender, pink, blue, white, or wine, opening late summer when most flowering shrubs are done.

Sweet Alyssum

Honey-scented carpet of tiny flowers. The best living edging plant.