Willowleaf Yellow Loosestrife Lysimachia ephemerum

👤 Non-toxic to humans
🐾 Non-toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Easy-care
willow-leaved loosestrife


The plant known as Willowleaf Yellow Loosestrife is recognized by its attractive willow-like foliage and tall spikes of starry white or pale pink flowers. The plant displays a graceful, erect habit, with slender stems that carry smooth, elongated leaves arranged in pairs or whorls. The leaves exhibit a grayish-green color, creating a soft and elegant texture. When it blooms, the Willowleaf Yellow Loosestrife produces flower spikes that adorn the plant's upper parts, presenting a frothy, airy appearance. Each individual flower is small and cup-shaped with five petals, often attracting bees and butterflies to the garden. The overall impression of the plant is one of delicate beauty and subtle charm.

Plant Info
Common Problems

About this plant

  • memoNames

    • Family


    • Synonyms

      Willowleaf Yellow Loosestrife, Willow-Leaved Loosestrife

    • Common names

      Lysimachia ephemerum.

  • skullToxicity

    • To humans

      The plant commonly known as Willow-leaved Loosestrife (Lysimachia ephemerum) is not generally known for being toxic to humans. There is limited information available regarding its toxicity, and it does not appear to be commonly regarded as a poisonous plant. As with any plant, individual sensitivities can vary, so it is always wise to exercise caution and avoid ingesting plants that are not confirmed to be safe or are not generally recognized as edible.

    • To pets

      Regarding the Willow-leaved Loosestrife (Lysimachia ephemerum), there is no widely documented toxicity for pets such as dogs and cats. While this plant is not typically known to be poisonous, the absence of known toxicity doesn't necessarily mean it is safe. Pets may have different sensitivities, and non-toxic plants can sometimes cause mild stomach upset if ingested. To ensure pet safety, it is still best to discourage pets from eating plants that are not specifically meant for them.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      3 feet (0.91 meters)

    • Spread

      2 feet (0.61 meters)

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Aesthetic Appeal - Willows herb (Lysimachia ephemerum) is often used in gardens and landscapes for its attractive spikes of white flowers and elegant, tall stems, which can add height and visual interest to a planting scheme.
    • Wildlife Attraction - The flowers of the Willows herb are a source of nectar for bees and other pollinating insects, which play a crucial role in the reproductive cycles of many plants and in ecosystem health.
    • Erosion Control - With its roots, Willows herb can help stabilize soil and prevent erosion, especially in moist areas where it thrives.
    • Rain Garden Plant - Being tolerant to wet conditions, Willows herb is suitable for rain gardens which aim to manage water runoff and improve water quality.
    • Low Maintenance - Once established, Willows herb typically requires little care, making it a convenient choice for gardeners seeking low-maintenance plants.

  • medicalMedical Properties

    This plant is not used for medical purposes.

  • windAir-purifying Qualities

    This plant is not specifically known for air purifying qualities.

  • leavesOther Uses

    • Lysimachia ephemerum, commonly known as Willowleaf Yellow Loosestrife, can be used to create natural fabric dyes, imparting hues ranging from yellow to greenish tones, depending on the mordant used.
    • In landscape design, Willowleaf Yellow Loosestrife is integrated into rain gardens for its ability to tolerate and thrive in wet conditions, helping to manage runoff and prevent soil erosion.
    • Floral arrangements often feature the graceful, tapered spikes of Willowleaf Yellow Loosestrife for their delicate white blooms and elegant stature, adding vertical interest to bouquets.
    • Some gardeners utilize Willowleaf Yellow Loosestrife as a ‘living mulch’, where its dense growth helps suppress weeds and retain soil moisture around taller, sun-loving plants.
    • The dense root system of Lysimachia ephemerum is studied for its potential use in phytoremediation projects to remove contaminants from wastewater or polluted soil.
    • As a companion plant in agriculture, Willowleaf Yellow Loosestrife is observed to attract beneficial insects that prey on common crop pests, aiding in integrated pest management systems.
    • Willowleaf Yellow Loosestrife serves as a vital nectar source for pollinators like bees and butterflies, thus contributing to the health of local ecosystems and supporting biodiversity.
    • Photographers and artists often use the distinctive form and foliage of Willowleaf Yellow Loosestrife as a subject in nature-inspired works, appreciating its graphic lines and shadows.
    • Culinary artists can use the flowers of Willowleaf Yellow Loosestrife as an edible garnish, although they are not widely known for their taste, but rather for their decorative appearance.
    • In education, Willowleaf Yellow Loosestrife plants are sometimes used in botanical studies for teaching about invasive plant management strategies, although this species is not particularly invasive.

Interesting Facts

  • bedFeng Shui

    The Willowleaf Yellow Loosestrife is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    The Willowleaf Yellow Loosestrife is not used in astrology practice.

  • spiralPlant Symbolism

    • Persistence: Lysimachia ephemerum, commonly known as Loosestrife, often symbolizes persistence due to its vigorous growth habit, as it can aggressively spread in favorable conditions.
    • Abundance: The plentiful flowering of Loosestrife can symbolize abundance and prosperity.
    • Strife or Discord: The "strife" portion of its common name has sometimes been associated with causing strife or representing discord, possibly due to the aggressive nature of some species in this genus.
    • Peace and Harmony: In contrast to its association with strife, some cultures may focus on Loosestrife's harmonious display of flowers and use it to symbolize peace and tranquility.

Every 1-2 weeks
500 - 2500 Lux
Every 2-3 years
Spring to Summer
As needed
  • water dropWater

    To properly water Willowleaf Yellow Loosestrife, it is best to maintain consistently moist soil conditions without letting it become waterlogged. Typically, watering once a week with about one to two gallons, depending on the size of the plant and the environmental conditions, should suffice, but during periods of drought or extreme heat, it may require more frequent watering. Apply water directly to the base of the plant, avoiding wetting the foliage to reduce the risk of fungal diseases. In the winter, you can reduce watering frequency since the plant's water requirements decrease.

  • sunLight

    Willowleaf Yellow Loosestrife thrives in full sun to partial shade. The ideal spot for this plant would receive bright, indirect sunlight for most of the day with some protection from the harsh afternoon sun, especially in hotter regions. An east-facing or west-facing garden where it gets gentle morning or evening sunlight lets it grow optimally.

  • thermometerTemperature

    Willowleaf Yellow Loosestrife is relatively hardy and can survive in a range of temperatures; however, it does best when the temperature remains between 50 to 75 degrees Fahrenheit. They can withstand temperatures as low as 40 degrees Fahrenheit without damage, but for optimal growth, avoid exposing them to extreme cold or heat above 80 degrees Fahrenheit if possible.

  • scissorsPruning

    Prune Willowleaf Yellow Loosestrife to remove dead or damaged stems and to shape the plant, generally at the end of the flowering season or in early spring before new growth begins. Periodically deadheading, or removing spent flowers, encourages continued blooming and prevents self-seeding if not desired. Pruning every couple of years can also help rejuvenate older plants and maintain vigor.

  • broomCleaning

    As needed

  • bambooSoil

    Willowherb prefers moist, well-draining soil with a high organic content. A good mix would consist of peat, perlite, and garden loam, offering aeration and moisture retention. The ideal soil pH for Willowherb should range between 5.5 and 7.5.

  • plantRepotting

    Willowherb should be repotted every 2 to 3 years. It's best to refresh the potting mix to prevent soil compaction and replenish nutrients. This will also provide space for root growth and maintain plant health.

  • water dropsHumidity & Misting

    Willowherb thrives in average home humidity levels, but it benefits from higher humidity. Aim for humidity levels around 40-50% for optimal growth.

  • pinSuitable locations

    • Indoor

      Provide bright indirect light, keep soil moist, and ensure proper drainage for indoor Willowherb.

    • Outdoor

      Plant in partial shade, keep moist, and protect from hot afternoon sun for outdoor Willowherb.

    • Hardiness zone

      5-9 USDA

  • circleLife cycle

    Lysimachia ephemerum, commonly known as Willowleaf Yellow Loosestrife, begins its life cycle as a seed, germinating in moist, well-drained soil typically in early spring. After germination, the seedling emerges and develops into a rosette of leaves at the ground level, from which a slender, erect stem will grow. As the plant matures, it forms lance-shaped, dark green leaves in a whorled or opposite arrangement along the stem. By midsummer, the Willowleaf Yellow Loosestrife produces clusters of small, star-shaped white flowers with a hint of green, often near the tips of the branches. Following pollination, often by insects, the flowers give way to small capsules containing numerous tiny seeds. After setting seed, the plant goes dormant in autumn, with the above-ground parts dying back, while the underground rhizomes survive to sprout new growth the following spring.

  • sproutPropogation

    • Propogation time

      Spring to Summer

    • Propogation: Lysimachia ephemerum, commonly known as Willowleaf Yellow Loosestrife, can be propagated through division, which is a popular method for this perennial plant. The best time to divide it is in the spring or early fall when the plant is not in active bloom. To propagate by division, carefully dig up the plant, ensuring you have a large enough root ball. Shake or wash off excess soil and gently tease apart the clumps into sections, making sure that each new section has a healthy piece of root attached. Replant the divisions promptly, maintaining the same soil level as before and watering them well to establish. This method allows gardeners to quickly multiply their plants while ensuring that the new plants will retain the characteristics of the parent.