Plant Library

Other Names:  Whorled Loosestrife

Ornamental Features

Yellow Loosestrife has masses of beautiful spikes of gold star-shaped flowers at the ends of the stems from late spring to early summer, which are most effective when planted in groupings. The flowers are excellent for cutting. Its pointy leaves remain green in color throughout the season.

Landscape Attributes

Yellow Loosestrife is a dense herbaceous perennial with an upright spreading habit of growth. Its medium texture blends into the garden, but can always be balanced by a couple of finer or coarser plants for an effective composition.

This is a high maintenance plant that will require regular care and upkeep, and is best cleaned up in early spring before it resumes active growth for the season. It is a good choice for attracting butterflies to your yard. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

• Invasive

Yellow Loosestrife is recommended for the following landscape applications;

• Mass Planting
• General Garden Use
• Bog Gardens

Planting & Growing

Yellow Loosestrife will grow to be about 24 inches tall at maturity extending to 32 inches tall with the flowers, with a spread of 3 feet. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 24 inches apart. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 10 years. As an herbaceous perennial, this plant will usually die back to the crown each winter, and will regrow from the base each spring. Be careful not to disturb the crown in late winter when it may not be readily seen!

This plant does best in full sun to partial shade. It is quite adaptable, prefering to grow in average to wet conditions, and will even tolerate some standing water. It is not particular as to soil type or pH. It is somewhat tolerant of urban pollution. This species is not originally from North America. It can be propagated by division.