Purple loosestrife can produce more than two million tiny seeds per plant. The flowers are showy and bright, and a number of cultivars have been selected for variation in flower colour, including: Background. Other common names of the invasive plant are spiked loosestrife, beautiful killer, salicare, blooming sally, flowering sally, and purple Lythrum. The purple loosestrife plant (Lythrum salicaria) is an extremely invasive perennial that has spread throughout the upper Midwest and Northeastern United States.It has become a menace to the native plants in the wetlands of these areas where it chokes out the growth of all its competitors. Purple Loosestrife Lythrum salicaria Loosestrife family (Lythraceae) Description: This perennial plant is 2-5' tall, branching frequently below the inflorescence. Types vary from stately plants suitable for borders to ones that serve as creeping groundcovers. It is difficult and expensive to grow from seed. Plant each piece for new floral displays. The plant also has a thick taproot with fibrous rhizomes that form a dense mat, making it difficult to remove. Propagate by division in spring, Suggested planting locations and garden types The plant produces large quantities of seeds which require strong light to make them germinate. Grow in any reliably moist soil in full sun, Propagation JavaScript seems to be disabled in your browser. Flower borders and beds In our "Plants to Know" series, we are looking at a variety of common plants, medicinal plants, edible plants, and even invasive plants. 2-5 years, Cultivation ← Previous Post It is difficult and expensive to grow from seed. Take care to prevent further seed spread from clothing or equipment during the removal process. In our cold climate garden we grow this species in our ponds. gracile, Family These plants will have a lot more details displayed including an image. By the late 1800s, purple loosestrife had spread throughout the northeastern United States and southeastern Canada, … Fertilizing Loosestrife When purple loosestrife seedlings are first set out in the spring, sprinkle a teaspoon or so of an all-purpose granular fertilizer on the soil around the plant stems for rain or watering to soak in. The Royal Horticultural Society is the UK’s leading gardening charity. Purple loosestrife flowers around the same time, and it seems to me to be just as a good a plant for pollinators.  if you have any questions or suggestions for us. Next Post →. Gooseneck loosestrife flowers are attractive to butterflies so dot the pieces … 222879/SC038262, If you enter just a plant name, you will see results from the old RHS Plant Finder and Selector databases. Apr 25, 2018 - Explore Loosestrifemovement's board "Purple Loosestrife" on Pinterest. Washington, DC: U.S. Dept. Purple-loosestrife is a tall plant, with large, pink flower spikes and long green leaves in opposite pairs up the stem. It is also cultivated as an ornamental plant in gardens, and is particularly associated with damp, poorly drained locations such as marshes, bogs and watersides. They are: This plant will provide nectar and pollen for bees and the many other types of pollinating insects. A mature plant can develop into a large clump of stems up to five feet in diameter. U.S. National Plant Germplasm System - Lythrum salicaria RHS members can get exclusive individual advice from the RHS Gardening Advice team. It is difficult to remove all of the roots in a single digging, so monitor the area for several growing seasons to ensure that purple loosestrife has not regrown from roots or seed. 1-1.5 metres, Ultimate spread Generally disease free. Old World, All ratings refer to the UK growing conditions unless otherwise stated. the RHS today and get 12 months for the price of 9, Other common names Lythraceae, Genus Older plants have larger roots that can be eased out with a garden fork. Excellent for ordinary use in appropriate conditions. It can grow up to 120 cm tall. This is an ideal plant to grow in aquatic environments. AGM plants have been through a rigorous trial and assessment programme. A perennial from Europe, purple loosestrife (Lythrum salicaria)usually grows from 3-5 feet tall, but can reach a height of up to 7 feet. Spread, impact, and control of purple loosestrife (Lythrum salicaria) in North American wetlands. Remove as much of the root system as possible, because broken roots may sprout new plants. Minimum temperature ranges (in degrees C) are shown in brackets, Ultimate height (click image to enlarge) Spring purple loosestrife and native wetland look-a-like stems from left: two-year-old plant, one-year-old plant, Steeplebush ( Spiraea tomentosa ), Swamp Loosestrife ( Decodon verticillatus ), Great Water Dock ( Rumex britannica ). So either divide rootstock in March or take cuttings of new shoots in April. L. salicaria is a robust herbaceous perennial with upright stems to 1.2m tall, clad in narrow, willowy leaves, and small vivid purplish-pink flowers 2cm wide in dense terminal spikes over a long period in summer, Plant range If you select any attributes with or without a plant name, you will see a much narrower selection of results taken only from the old RHS Plant Selector database. long purples purple grass rainbow weed red Sally rose loosestrife rosy strip sage willow soldiers spiked loosestrife willow weed see more Synonyms Lythrum salicaria var. Purple loosestrife (Lythrum salicaria, L. virgatum and any combination thereof) is listed as a MDA Prohibited Noxious Weed (Control List) and a prohibited invasive species in Minnesota, which means it is unlawful (a misdemeanor) to possess, import, purchase, transport or introduce this species except under a permit for disposal, control, research or education. The plant will grow in rich, marshy areas. Do not allow the fertilizer to touch the leaves or branches of the plant. By streams,rivers and lakes. Purple loosetrife is on the Control noxious weed list meaning you must prevent the spread of this plant. The seeds are small, light and are easily dispersed by the wind, which carries them great distances. Other articles where Purple loosestrife is discussed: loosestrife: Purple loosestrife (Lythrum salicaria), native to Eurasia and now common in eastern North America, grows 0.6 to 1.8 metres (2 to 6 feet) high on riverbanks and in ditches. 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