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Winged Loosestrife

Lythrum alatum

Family: Lythraceae (ly-THRAY-see-ee) (Info)
Genus: Lythrum (LY-thrum) (Info)
Species: alatum (a-LAY-tum) (Info)



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Requires consistently moist soil; do not let dry out between waterings

Very high moisture needs; suitable for bogs and water gardens

Where to Grow:

Unknown - Tell us


12-18 in. (30-45 cm)

18-24 in. (45-60 cm)

24-36 in. (60-90 cm)

36-48 in. (90-120 cm)


9-12 in. (22-30 cm)


USDA Zone 3a: to -39.9 C (-40 F)

USDA Zone 3b: to -37.2 C (-35 F)

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Sun to Partial Shade


Unknown - Tell us

Bloom Color:



Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall



Other details:

This plant may be considered a protected species; check before digging or gathering seeds

Soil pH requirements:

Unknown - Tell us

Patent Information:


Propagation Methods:

Self-sows freely; deadhead if you do not want volunteer seedlings next season

Seed Collecting:

Unknown - Tell us


This plant has been said to grow in the following regions:

Erie, Michigan

Frenchtown, New Jersey

Elizabeth City, North Carolina (2 reports)

Gardeners' Notes:


On Jan 17, 2005, JodyC from Palmyra, IL (Zone 5b) wrote:

This native plant should not be confused with Lythrum salicaria (Purple Loosestrife). The latter is an aggressive Eurasian plant that invades wetlands and forms dense stands that exclude other species. It was introduced to the United States as an ornamental plant. As compared to the native plant, Purple Loosestrife has wingless stems, a larger size, and slender willow-like leaves that often have hairs.


On Dec 29, 2004, Floridian from Lutz, FL (Zone 9b) wrote:

A woody, multi branched, slender stemmed shrub that can reach 6 feet tall. The flowers are pinkish purple with 6 crinkled lobes. In Florida the plant blooms from about May through September. Its natural habitat is marshes, flatwoods and wet depressions from North Carolina south through penninsular Florida and east to Oklahoma and Texas.


On Jan 19, 2003, Terry from Murfreesboro, TN (Zone 7a) wrote:

Not to be confused with L. salicaria, Winged Loosestrife is native to the United States and has hairles semmed with leaves that are alternate in the upper half of the stem and opposite in the lower half. It is not considered invasive; in fact, it is considered rare in many areas.

Care should still be taken to ensure L. salicaria is not growing nearby, as the species can cross-pollinate.