Purple loosestrife is an invasive perennial plant with spikes of bright purple flowers that bloom in mid- to late summer. Purple loosestrife has spikes of bright purple or magenta flowers that bloom in July to September.
Its stems are square and six-sided. Long or lance-shaped leaves grow up to 4 inches long and are arranged in pairs or whorls of three along the stems. In autumn, the leaves often turn red for about two weeks before fading and falling off. Purple loosestrife can grow to six feet tall. Low-maintenance creeping, hardy carpet Phlox is ideal for colourful, spring ground cover.
Home How to Grow plants How to grow purple loosestrife. This review contains affiliate links and we may receive a commission for purchases made.
Please read our affiliates FAQ page to find out more. Purple loosestrife, Lythrum salicaria. Planting purple loosestrife in a pond. Purple loosestrife seed. Subscribe now. Buy now for spring flowers. Small infestations can be removed with a shovel. Be sure no portions of roots or stems remain. Glyphosate-containing herbicides are recommended for chemical control. Herbicides containing the active ingredient triclopyr, formulated for water dilution are also effective.
Biological control using insects that solely feed on purple loosestrife are also proving effective see box below for more information. All control methods will likely need to be repeated for several years.
Encourage your community to scout for and remove any purple loosestrife in your area. Ask Your Gardening Question. We teach, learn, lead and serve, connecting people with the University of Wisconsin, and engaging with them in transforming lives and communities. Connect with your County Extension Office ». Mechanical or chemical management will require multiple years to completely remove adult plants and exhaust the seedbank.
Four species beetles 2 leaf beetles and 2 weevils have been released in the United States as biocontrol agents for purple loosestrife.
They have had some measure of success controlling purple loosestrife populations. The leaf-feeding beetles Galerucella calmariensis and G. The weevil Nanophyes marmoratus feeds on seeds and flower buds, and the weevil Hylobius transversovittatus attacks both roots as larvae and foliage as adults. Absence of data does not necessarily mean absence of the species at that site, but that it has not been reported there. For more information, please visit iMapInvasives. Stand of mature purple loosestrife.
North American range December Purple loosestrife stalk and leaves. Large stands of purple loosestrife can clog waterways and deprive native wildlife of habitat and food. New York Distribution Map.
0コメント