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
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
Fall
Uses: Medicinal Herb
Cut Flower
Wildlife Attractant: Bees
Butterflies
Propagation: Seeds: Depth to plant seed: cover the seeds very thin
Suitable for wintersowing
Sow in situ
Start indoors
Can handle transplanting
Pollinators: Flies
Bees

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Honey Bees in the Garden:  JuneHoney Bees in the Garden: June
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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Comments:
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 (Pacific NW - 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 Frillylily (springfield MO area - Zone 6a) on Oct 14, 2015 8:24 PM

I grew this plant for several years in my Missouri garden and it showed absolutely no invasive qualities. It did not seed or spread by runner. It was in a fairly dry area, not around water. When it gets extremely hot and dry, the plant appears to go semi-dormant. It dies to the ground and totally re-grows in the spring. Bees love the blooms. It also was a magnet for Japanese beetles. Not fragrant. Maybe there are hybrid varieties that do not seed?

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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) 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
Thread Title Last Reply Replies
Wildflower found in Michigan by MRSBailey Jul 11, 2017 9:42 AM 3
Pink by VisarAlbania Aug 24, 2016 11:04 AM 6
mystery flowering plant seems out of place where found by Pegasys May 17, 2016 9:25 AM 6
Purple mystery plant by woodenman12 Dec 26, 2015 6:16 AM 4
Good morning, Plant Tips by bltgirl1 Aug 4, 2015 8:02 PM 5
Wild on lake shore by Anderwood Aug 3, 2014 6:53 PM 2
This plant just kind of showed up. by putitupmike Mar 19, 2014 3:59 PM 11

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