Plants that bloom in October in Zone 3 with lavender flowers

Aster

The grand finale of the garden season. Essential for fall pollinators.

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.

Sweet Alyssum

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