Alternative Plants

The nursery industry has been quick to respond to the purple loosestrife challenge. Landscapers and gardeners can now select from a wide variety of alternative perennial plants which pose no threat to the environment. The following is a small sampling of what's recommended in western Canada. See your local nursery or garden center for details on purple loosestrife replacements.

Lilies (Lilium)

There are a wide variety of lilies with a vast range of colors. Different varieties flower from early summer to late fall and may grow as tall as six feet.

Spiked Speedwell (Veronica spicata)

This mid-summer flowering perennial has blue, spike-shaped blossoms and grows to a height of a foot and a half. It does well in full sun, but also tolerates partial shade.

Siberian Iris (Iris sibirica)

This perennial stands two feet tall and flowers through late spring and early summer with white, blue and purple blossoms. It requires a sunny to partially shady site.

Spiked Gayfeather, Blazing Star (Liatris spicata)

This five foot tall native of eastern Canada had pink, purple or white blossoms from mid-summer to early fall. It requires full sunlight to partial shade.

Garden Sage (Salvia)

This summer blossoming plant features flowers which are violet to blue. It is drought tolerant, likes full sunlight and grows from a foot and a half up to three feet tall. Garden sage may not be hardy in some prairie climates. Check with your local nursery.

Purple Coneflower (Echinacea purpurea)

Purple Coneflower grows about 3 feet tall and flowers in late July and August. It is easy to grow.

Little Princess  

This compact 38 cm (15 in.) native mallow has soft frilly flowers and blooms in July and August. It requires full sun to partial shade.


Manitoba Conservation Ducks Unlimited City of Winnipeg Invasive Species Council of Manitoba