Poppy-flowered anemone (A. coronaria)

Winning qualities: The clear reds, blues, and whites sparkle in spring, and the blossoms’ simple shapes make them perfect companions for sweet peas. 

Favorite ​varieties: Most are sold by color; blues and pastels are Kolla’s mainstay.

When to plant: Set out tubers in early spring in cold climates; fall in mild climates (or check nurseries in spring for blooming plants).

Growing tips: Plant tubers at least ​8 inches apart to discourage powdery mildew from forming on the leaves.

Mark the location of the tubers with a plastic fork or wood stick when planting so you don’t accidentally dig them up later while weeding.