Bog sage Salvia uliginosa

👤 Non-toxic to humans
🐾 Non-toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Easy-care
bog sage


Salvia uliginosa, commonly known as Bog Sage, is a visually striking plant notable for its long flowering stems and vibrant blue flowers. The stems are upright and often appear in clusters, creating a dense, bushy form. Its foliage consists of narrow, lance-shaped leaves that are bright green in color, giving the plant a lush, vibrant look. The leaves can sometimes have a wrinkly texture, adding a bit of visual interest to the otherwise smooth stems. The most striking feature of the Bog Sage is its flowers. They bloom in whorls along the stems and are a vivid sky-blue color, sometimes with a hint of azure or cornflower blue. Each flower is tubular and small, with two lips that are common in many sage varieties—the upper lip typically being a hood and the lower one spreading out a bit more. The flowers are arranged in loose, elongated spikes, producing a profusion of color that can create a striking contrast with the greenery of the foliage. These blooms are known to attract a variety of pollinators, including bees and butterflies, which adds to the plant's charm and vitality. While Bog Sage is appreciated for its ornamental qualities, it also has a hardy nature and can adapt to various growing conditions. This adaptability, combined with the plant's compelling appearance, makes it a favored choice for gardeners looking to add a touch of color and attraction to their garden spaces.

Plant Info
Common Problems

About this plant

  • memoNames

    • Family


    • Synonyms

      Bog Sage, Blue Spike Sage, Argentine Skies.

    • Common names

      Salvia uliginosa.

  • skullToxicity

    • To humans

      Salvia uliginosa, commonly known as Bog Sage, is not widely recognized as a toxic plant to humans. There is no significant evidence to suggest that Bog Sage has any substantial toxic effects if ingested. As with many plants, it is possible for individuals to have allergic reactions or sensitivities, but the general toxicity for human ingestion is considered low. However, it's always prudent to caution against eating any plant parts if you are not certain of their edibility and safety.

    • To pets

      Bog Sage, or Salvia uliginosa, is not typically known to be toxic to pets such as dogs and cats. There is a lack of substantial evidence indicating that this plant poses a risk of poisoning to pets. Nevertheless, as with all non-food plants, eating large quantities of foliage or plant material can potentially cause mild gastrointestinal upset in some animals. It is advisable to monitor pets around garden plants and discourage them from ingesting any plant material to avoid any potential issues.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      4 feet (1.2 meters)

    • Spread

      3 feet (0.9 meters)

    • Plant type


    • Hardiness zones


    • Native area

      South America


  • money-bagGeneral Benefits

    • Attracts Pollinators: Salvia uliginosa, commonly known as Bog sage, is known to attract bees, butterflies, and hummingbirds, which aid in the pollination of surrounding plants.
    • Aesthetic Appeal: With its striking blue flowers and tall, graceful stems, Bog sage adds color and height to garden borders and ornamental arrangements.
    • Drought Tolerance: Once established, Bog sage is drought-resistant, making it a low-maintenance option for gardens in arid climates or during water restrictions.
    • Rapid Growth: This plant grows quickly, allowing gardeners to establish a mature and full-looking garden in a relatively short amount of time.
    • Erosion Control: The dense root system of the Bog sage can help stabilize soil and prevent erosion, especially in areas with moist soils.
    • Wildlife Habitat: Provides shelter and food to various wildlife, creating a more diverse and ecologically balanced garden environment.
    • Herbaceous Perennial: As a perennial, Bog sage comes back year after year, reducing the need for replanting and maintenance.

  • 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

    • Salvia uliginosa, commonly known as Bog Sage, can be used as a natural dye for fabrics, yielding a range of blue or green hues depending on the mordant used.
    • Bog Sage may serve as a companion plant in gardens, attracting beneficial insects such as bees and butterflies due to its abundant nectar-rich flowers.
    • This plant can be used in cut flower arrangements for its striking blue blossoms and long vase life, adding a wildflower aesthetic to bouquets.
    • Bog Sage's rapid growth and spreading habit make it suitable as a ground cover in large garden spaces to suppress weeds.
    • The aromatic leaves of the Bog Sage may be used in potpourris or to infuse a pleasant fragrance into linens or drawers.
    • Gardeners might employ Bog Sage for its aesthetic appeal in water garden design, providing a naturalistic look alongside ponds and streams.
    • The plant's dense foliage can be used to provide habitat and shelter for small wildlife, such as birds and beneficial insects.
    • Bog Sage can play a role in erosion control due to its robust root system that stabilizes soil, especially in damp areas prone to water run-off.
    • Due to its adaptability, Bog Sage is sometimes used in permaculture designs as part of a guild that supports biodiversity and soil health.
    • In crafting, the stems of dried Bog Sage can be incorporated into wreaths and other decorative items for a natural touch.

Interesting Facts

  • bedFeng Shui

    The Bog sage is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    The Bog sage is not used in astrology practice.

  • spiralPlant Symbolism

    • Healing - Salvia stems from the Latin word "salvere," meaning "to save" or "to heal," reflecting the various Salvia species' historical use in medicinal remedies.
    • Wisdom - As a member of the sage family, it symbolizes wisdom and is often associated with the acquisition of knowledge and guidance.
    • Longevity - Salvia plants are perennials, returning year after year, which can be interpreted as a sign of enduring life and lasting presence.
    • Protection - In traditional herbal lore, sage varieties, including Salvia uliginosa, were thought to offer protection against evil and were used in cleansing rituals.
    • Purity - The clean and aromatic scent of sage is frequently connected to notions of purity and cleanliness in a spiritual or emotional sense.
    • Immortality - Sage has a long-standing association with immortality due to its enduring nature and longstanding medicinal uses.

Every 1-2 weeks
2500 - 10000 Lux
Every 2-3 years
Spring-early summer
As needed
  • water dropWater

    Bog Sage requires regular watering, especially during dry periods, to maintain consistent soil moisture. Early morning is the best time to water, allowing the foliage to dry out during the day, which reduces the risk of disease. An established plant typically needs about 1 inch of water per week, either from rainfall or supplemental watering. During intense heat or drought, increase watering frequency to twice a week, providing approximately half a gallon to a gallon of water per plant, making sure to water deeply to encourage strong root growth.

  • sunLight

    Bog Sage thrives in full sun exposure, which means it requires direct sunlight for at least 6 to 8 hours a day. It can also grow in partial shade; however, maximum flowering is achieved in full sun. The plant will perform best in a location that is free from the shade of trees or buildings, especially during the peak sunlight hours.

  • thermometerTemperature

    Bog Sage is hardy in zones 6 through 9 and prefers temperatures between 50 and 85 degrees Fahrenheit. It can withstand occasional dips to around 10 degrees Fahrenheit, but prolonged exposure to temperatures below this can be harmful. The ideal temperature range maximizes growth and flowering potential, with protection from extreme heat above 90 degrees Fahrenheit or cold snaps below 10 degrees Fahrenheit.

  • scissorsPruning

    Bog Sage should be pruned to remove dead or damaged stems and to encourage bushier growth. The best time for pruning is in early spring, before new growth begins, or just after the first flowering to promote a second bloom. Prune up to one-third of the plant's height, cutting back to just above a pair of healthy leaves. Annual pruning helps maintain a compact form and increases flower production.

  • broomCleaning

    As needed

  • bambooSoil

    Bog sage prefers moist, well-draining soil with a pH of 6 to 7.5. A mix of garden loam, peat or compost, and sand or perlite in equal parts creates an ideal environment for growth.

  • plantRepotting

    Bog sage should be repotted every 1 to 2 years. This encourages healthier growth and allows for replenishment of the soil's nutrients.

  • water dropsHumidity & Misting

    Bog sage thrives in moderate to high humidity levels, similar to its native swampy habitats. It does best with humidity levels around 50-60%.

  • pinSuitable locations

    • Indoor

      Provide bright light and maintain moist soil for healthy indoor bog sage.

    • Outdoor

      Plant in sun or part shade and keep soil consistently moist.

    • Hardiness zone

      6-9 USDA.

  • circleLife cycle

    Salvia uliginosa, commonly known as Bog Sage, begins its life as a seed, which, once sown, undergoes germination when conditions are warm and moist. The seedling then emerges, establishing a root system and growing its first set of true leaves. As it enters the vegetative stage, Bog Sage develops a sturdy stem and a larger leaf area, enabling it to photosynthesize more efficiently. During the flowering stage, it produces tall spikes of striking blue flowers from late summer to fall, attracting pollinators such as bees and butterflies. After pollination, it sets seed within small nutlets that can be dispersed to produce new plants. In colder climates, Bog Sage may die back in winter, to re-emerge from its rhizomes or from self-sown seeds with the return of warmer weather in spring.

  • sproutPropogation

    • Propogation time

      Spring-early summer

    • Propogation: The most popular method of propagating Salvia uliginosa, commonly known as Bog Sage, is through softwood cuttings. This technique is usually conducted in late spring to early summer when the plant's new growth is just beginning to harden, yet still pliable. To propagate by cuttings, choose a healthy, non-flowering stem and cut a 3 to 5-inch (roughly 7.5 to 12.5 centimeters) piece just below a node, where a leaf joins the stem. Stripping the lower leaves and dipping the cut end into a rooting hormone can help encourage root development. The cutting should then be placed in a well-draining potting mix, ensuring at least one node is buried where roots can form. Ideal conditions include bright, indirect light and consistent moisture, with the medium kept damp but not waterlogged. After several weeks, once the cutting has rooted, it can be transplanted into a soil mix that is appropriate for mature Salvia uliginosa plants.