Rock Astilbe Astilbe glaberrima var. saxatilis

👤 Non-toxic to humans
🐾 Non-toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Hard-care
smooth rock astilbe


Astilbe, commonly known for its delicate and frothy plumes, is a perennial favored for its graceful and feathery flower spikes. It boasts a floriferous appeal, with its flower clusters presenting a feathery silhouette and often found in a range of hues that can include shades of white, pink, or red, offering a visually soft and airy display. The flowers are held aloft on slender, branching stems that rise above the plant's mound-like foliage. The leaves of Astilbe are usually deeply divided and fern-like in appearance, creating a lush, finely textured mound of greenery. These leaves can vary in color from deep green to bronze-tinted green, contributing to the plant's ornamental value even when it is not in bloom. Astilbe also has a charming attribute of being attractive to butterflies, bringing an added layer of liveliness to gardens or naturalized settings. With its elegant and whispery flower plumes dancing atop the rich foliage, Astilbe offers a touch of refined beauty and sophistication to any garden setting where it is planted.

Plant Info
Common Problems

About this plant

  • memoNames

    • Synonyms

      Rock Jasmine, Siberian Astilbe, Rock False Goat's Beard, False Spirea

    • Common names

      Astilbe saxatilis, Astilbe saxatilis var. yokoscensis.

  • skullToxicity

    • To humans

      The Astilbe, also known as false goat's beard or false spirea, is generally not considered toxic to humans. It does not contain any known toxic principles that would cause poisoning upon ingestion. Therefore, there are no specific symptoms associated with poisoning from this plant, as it is not expected to cause harm to humans if any part of the plant is ingested.

    • To pets

      The Astilbe, also referred to as false goat's beard or false spirea, is not considered toxic to pets, including dogs and cats. This plant is not known to contain harmful substances that would lead to poisoning. As such, the ingestion of any part of the Astilbe by pets is not expected to result in toxic consequences or symptomatic poisoning.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      1 foot (30 cm)

    • Spread

      1 foot (30 cm)

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Aesthetic Appeal: Adds a delicate texture and vibrant color to shade gardens with its plumes of flowers.
    • Drought Tolerance: Once established, it has good resistance to short periods of drought.
    • Shade Tolerance: Thrives in shaded areas where other plants might struggle to grow.
    • Low Maintenance: Requires minimal care once established, making it suitable for novice gardeners.
    • Attracts Wildlife: Its flowers can attract butterflies and other beneficial insects to the garden.
    • Seasonal Interest: Provides changing visual interest throughout the spring and summer months.
    • Erosion Control: Helps prevent soil erosion in garden areas due to its clumping growth habit.
    • Soil Adaptability: Can grow in a variety of soil types, although it prefers moist, well-drained soils.
    • Cold Hardy: Capable of withstanding cold temperatures, making it suitable for gardens in cooler climates.
    • Non-Invasive: Unlike some garden plants, it does not tend to spread uncontrollably.

  • 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

    • Astilbe can be used in floral crafts such as dried flower arrangements due to its stiff, feathery plumes that retain their shape and color well after drying.
    • The dense foliage of Astilbe provides excellent ground cover for shady garden spots, helping to suppress weeds and maintain soil moisture.
    • Often utilized for waterside plantings, Astilbe can stabilize soil and prevent erosion due to its robust root system.
    • Astilbe flowers can serve as a natural dye source, imparting subtle colors to fabrics or other materials.
    • In landscape design, Astilbe can be used to provide textural contrast against plants with broad leaves or smooth stems.
    • Considered a good companion plant, Astilbe can be beneficial for neighboring plants by attracting beneficial insects like bees and butterflies to the garden.
    • With their varying heights, Astilbes are ideal for tiered garden beds, providing a cascade of color and foliage from back to front.
    • The plant is sometimes integrated into educational gardens to demonstrate biodiversity or the structure of perennial plants.
    • Astilbe is suitable for container gardening, where its striking flowers can be displayed on patios or balconies.
    • The plants can be utilized in theme gardens, such as fairy gardens, due to their delicate and feathery appearance, giving a whimsical touch.

Interesting Facts

  • bedFeng Shui

    The plant Astilbe is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    The plant Astilbe is not used in astrology practice.

  • spiralPlant Symbolism

    • Patience and Dedication: Astilbe, also known as False Goat's Beard, often symbolizes patience and dedication due to its need for proper care and its slow but steady growth.
    • Enduring Love: The lush, feathery plumes of False Goat's Beard can signify an enduring and resilient love, making it a choice for romantic occasions.
    • Hope and Dreams: With its bright and airy flowers, False Goat's Beard is sometimes associated with hope and the pursuit of dreams, as it adds a magical touch to any garden.
    • I'll Still Be Waiting: The long-lasting and persistent nature of False Goat's Beard blooms might convey a message of waiting for a loved one, representing loyalty and faithfulness.

Every 3-4 days
500 - 2500 Lux
Every 2-3 years
Spring to summer
As needed
  • water dropWater

    False Goat's Beard prefers consistently moist soil, so it should be watered regularly. During the growing season, keep the soil evenly moist without letting it dry out; water approximately once or twice a week, depending on climate conditions. Provide roughly one gallon of water per plant for each watering session to ensure deep soil penetration. In hot, dry spells, increase watering frequency to maintain moisture, but always avoid waterlogging. During winter, reduce watering as the plant goes dormant and requires less moisture.

  • sunLight

    False Goat's Beard thrives best in partial shade to full shade conditions. The ideal spot for this plant is an area that receives filtered sunlight or a few hours of morning sun, followed by dappled or full shade during the afternoon. Avoid exposing it to the intense, direct sun as it can scorch the foliage and impede the plant's growth.

  • thermometerTemperature

    False Goat's Beard can withstand a temperature range between 20°F to 75°F, making it well-suited for various climates as long as extreme temperatures are avoided. Ideally, this plant prefers the cooler end of this spectrum, flourishing in temperatures between 60°F and 70°F. Prolonged exposure to temperatures below 20°F can damage or kill the plant, while excessive heat above 75°F may inhibit growth.

  • scissorsPruning

    False Goat's Beard should be pruned to remove spent flowers and maintain a tidy appearance. Deadheading the faded blossoms can encourage a second bloom and prevent unwanted self-seeding. After the first frost, cut back the foliage to the ground to promote healthy growth in spring. Pruning is typically done once a year, ideally in late fall or early winter after the plant has finished flowering.

  • broomCleaning

    As needed

  • bambooSoil

    False Spirea thrives in a rich, moist, well-draining soil mix with a pH of around 6.0 to 7.0. A good mix would be garden soil, peat moss, and perlite in equal parts to ensure moisture retention and proper drainage.

  • plantRepotting

    False Spirea typically needs to be repotted every 2-3 years to avoid becoming root-bound and to replenish its soil nutrients.

  • water dropsHumidity & Misting

    False Spirea prefers a high humidity environment, ideally between 60% to 80% for optimal growth.

  • pinSuitable locations

    • Indoor

      Place False Spirea in well-lit spot, avoid dry air and direct sun.

    • Outdoor

      Plant in partial shade and keep soil moist for outdoor False Spirea.

    • Hardiness zone

      4-8 USDA

  • circleLife cycle

    Astilbe glaberrima var. saxatilis, commonly known as False Goat's Beard or Rock Astilbe, begins its life cycle as a dormant rhizome that breaks dormancy in early spring. It develops into a rosette of foliage, followed by tall, arching stems that bear panicles of feather-like flowers ranging in color from white to pink and red. After flowering in late spring or early summer, the plant sets seed, which can fall to the ground and produce new plants, or the seed can be collected and sown elsewhere. As fall approaches, the above-ground foliage of the Astilbe withers and the plant enters a period of dormancy. Throughout winter, the below-ground rhizome survives and stores energy for the next growing season. Come spring, the cycle begins anew, with new growth emerging from the rhizome.

  • sproutPropogation

    • Propogation time

      Spring to summer

    • Astilbe glaberrima var. saxatilis, commonly known as False Spirea, is best propagated through division, a method that is effective and popular among gardeners. This should ideally be done in the spring just as the plants are emerging from the ground and the soil is workable. To propagate by division, carefully dig up the clump of the false spirea and gently separate it into smaller sections, each with at least one growth bud or eye. These divided sections can then be immediately replanted into a prepared garden bed or pot with adequate moisture, making sure to plant them at the same depth they were growing previously. Over the course of a few weeks, these divisions will establish their own root systems and begin to grow independently, developing into mature plants that will bloom typically within a year.