PlantsLythrum→Purple Loosestrife (Lythrum salicaria)

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Partial or Dappled Shade
Water Preferences: In Water
Wet Mesic
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Maximum recommended zone: Zone 9b
Plant Height: 32 - 40 inch
Plant Spread: 20 - 24 inch
Leaves: Unusual foliage color
Flowers: Showy
Flower Color: Pink
Flower Time: Summer
Late summer or early fall
Uses: Medicinal Herb
Cut Flower
Wildlife Attractant: Bees
Propagation: Seeds: Depth to plant seed: cover the seeds very thin
Suitable for wintersowing
Sow in situ
Start indoors
Can handle transplanting
Pollinators: Flies


Honey Bees in the Garden:  JuneHoney Bees in the Garden: June
By Mindy03 on June 1, 2011

June brings the end of school, Father's Day and summer. Summer brings hot weather and plants may need extra water. Honey bees will also need extra water to keep the hive cool.

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Posted by jmorth (central Illinois) on Jan 15, 2012 2:21 PM

Although of pleasant aspect growing up to 5' tall w/ reddish-purple clustered flowers and a four-sided stem; caution should be used. This loosestrife often occurs in dense stands that shade out native flora and is considered quite invasive (garden or in the wild). Likes to grow along moist edges of marshes, ponds, and roadsides.
Plant was introduced from Europe to the east coast of America in the early 1800's by immigrants as an ornamental and herb. Plant spread into the Midwest in the 1880's, reaching Illinois in the 1950's.
Plant is very difficult to eradicate. Each plant produces 1000s of seeds yearly that can lay dormant in soil for years; also replicates from roots and broken stems.

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Posted by Bonehead (Planet Earth - Zone 8b) on Sep 17, 2014 10:34 AM

Class B noxious weed in Washington, and targeted as one of the top priorities to control. Found in wetlands, where it out-competes native plants, provides a poor habitat for waterfowl, clogs the waterways, and reduces forage. Do not plant in Washington, and if found, remove any plants to reduce the seed source.

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Posted by Mindy03 (Delta KY) on Apr 23, 2012 4:50 PM

Honey bees get nectar and pollen from this plant.

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Posted by virginiarose (Virginia - Zone 8a) on Nov 10, 2013 8:58 AM

Virginia State listed Noxious Weed.

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Posted by Cakeholemoon (Garfield, WA - Zone 6a) on Feb 21, 2018 11:46 PM

I have two Purple Loosestrife plants on my property and they are very much in control at the edge of my pond. How do I keep them in control? They are in the shade!

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Discussion Threads about this plant
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This plant just kind of showed up. by putitupmike Mar 19, 2014 3:59 PM 11

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