Rough-leaved hydrangea Hydrangea aspera

☠ Toxic to humans
🐾 Toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Hard-care
rough-leaved hydrangea

ABOUT

Hydrangea aspera is a striking plant with a lush, bushy appearance. It is well-known for its broad, velvety leaves that have a textured feel to their surface. These leaves are a deep green color, adding to the dense and rich foliage of the plant. The most captivating feature of Hydrangea aspera is its large, flat-topped flower clusters known as corymbs, which bloom in an array of colors ranging from blue, pink, to purple, depending on the soil pH. These showy blooms typically have a ring of larger, sterile flowers surrounding smaller, fertile flowers, giving them a two-toned, lace-like appearance. The bark of Hydrangea aspera has a peeling texture, adding to its ornamental value, particularly during the winter months when the leaves have fallen, revealing the stems and the exfoliating bark. Overall, Hydrangea aspera provides a luxurious display of foliage and blossoms. Its distinctive look is a popular choice for gardeners and landscape designers who seek to add a touch of elegance and a burst of color to their gardens.

Plant Info
Care
Common Problems

About this plant

  • memoNames

    • Family

      Hydrangeaceae.

    • Synonyms

      Rough-Leaf Hydrangea, Hairy Hydrangea, Aspera Hydrangea, Sargent Hydrangea, Villosa Hydrangea.

    • Common names

      Hydrangea aspera subsp. sargentiana, Hydrangea aspera var. strigosa, Hydrangea strigosa, Hydrangea robusta.

  • skullToxicity

    • To humans

      Hydrangea aspera, commonly known simply as hydrangea, contains compounds that can be toxic to humans if ingested. The plant contains cyanogenic glycosides, which can release cyanide when chewed or broken down during digestion. Symptoms of hydrangea poisoning may include nausea, vomiting, stomach pain, diarrhea, and in severe cases, difficulty breathing and an increased heart rate. It is important to avoid ingesting any part of the hydrangea and to seek medical attention immediately if consumption is suspected.

    • To pets

      Hydrangea aspera, commonly referred to as hydrangea, is also poisonous to pets, including cats and dogs. Like in humans, the plant contains cyanogenic glycosides. When ingested in significant quantities, these compounds can break down into cyanide and cause poisoning. Symptoms in pets may include lethargy, vomiting, diarrhea, and increased heart rate. In severe cases, ingestion can result in convulsions, respiratory failure, and coma. If you suspect that your pet has ingested hydrangea, prompt veterinary care is crucial to manage the toxicity.

  • infoCharacteristics

    • Life cycle

      Perennials

    • Foliage type

      Deciduous

    • Color of leaves

      Green

    • Flower color

      Mixed

    • Height

      6-10 feet (1.8-3 meters)

    • Spread

      6-10 feet (1.8-3 meters)

    • Plant type

      Shrub

    • Hardiness zones

      7

    • Native area

      Asia

Benefits

  • money-bagGeneral Benefits

    • Aesthetic Appeal: Hydrangea aspera, commonly known as rough hydrangea, adds visual interest to gardens with its large, velvety leaves and showy flower clusters that can range in color from blue to pink, depending on the soil acidity.
    • Habitat for Wildlife: The flowers of the rough hydrangea provide nectar for pollinators such as bees and butterflies, while the dense foliage can offer shelter for small birds and other wildlife.
    • Erosion Control: With its expansive root system, rough hydrangea can help stabilize soil on slopes and prevent erosion.
    • Seasonal Interest: Rough hydrangea blooms in the summer and the flowers often remain on the plant as they dry, adding interest to the garden in different seasons.
    • Diversity in Landscaping: Rough hydrangea can be planted as part of a mixed border, in woodland gardens, or as a specimen plant, providing diversity in landscape design.
    • Low Maintenance: Once established, rough hydrangea is a low-maintenance plant, requiring minimal care other than occasional pruning to maintain shape and health.
    • Tolerant of Various Soil Types: Rough hydrangea is adaptable to a range of soil conditions, although it prefers well-drained, moist soils with rich organic content.

  • medicalMedical Properties

    • Anti-inflammatory: Hydrangea aspera may have properties that help reduce inflammation.
    • Antimalarial: There are indications that this plant has been used in traditional medicine systems to treat or prevent malaria.
    • Diuretic: The roots are believed to have diuretic effects, increasing the passing of urine.

  • windAir-purifying Qualities

    This plant is not specifically known for air purifying qualities.

  • leavesOther Uses

    • Hydrangea aspera can be used as a natural dye plant, yielding varying shades of blue, purple, pink, or gray depending on the pH of the soil it grows in.
    • The rough leaves of the Hydrangea aspera can be used as an abrasive in some traditional cleaning practices.
    • In some cultures, the wood of the Hydrangea aspera is carved into small items or turned into walking sticks due to its sturdy nature.
    • Landscape artists often utilize Hydrangea aspera for its striking foliage and flowers in thematic garden designs, such as woodland settings.
    • The Hydrangea aspera may serve as a privacy screen or hedge when planted in a series due to its dense foliage.
    • Beekeepers sometimes plant Hydrangea aspera nearby as it’s an attractive plant for bees and can aid in pollination of the garden.
    • The plant is utilized in educational settings such as botany programs and arboretums for teaching plant identification and classification.
    • Its large, ornamental leaves can be used in floral arrangements and displays, adding a unique texture to the composition.
    • Fine artists may draw inspiration from the intricate patterns of the Hydrangea aspera blooms and leaves, using them in works of art.
    • In photography, the diverse flowerheads and rich textures of Hydrangea aspera make it a compelling subject for botanical and garden photography.

Interesting Facts

  • bedFeng Shui

    The Hydrangea is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    The Hydrangea is not used in astrology practice.

  • spiralPlant Symbolism

    • Heartfelt Emotions: The hydrangea's lush and exuberant blooms represent the abundance of emotions and the ability to express deep feelings.
    • Gratitude: Historically, hydrangeas have been used to convey thankfulness and appreciation, often given as gifts to express such sentiments.
    • Apologies: In some contexts, hydrangeas can symbolize an apology or a request for forgiveness, particularly in Japan where the flower can be associated with remorse.
    • Vanity and Boastfulness: Due to its many blooms and sometimes showy appearance, the hydrangea can occasionally represent vanity or an overabundance of self-assuredness.
    • Frigidity: In some interpretations, hydrangeas may symbolize disinterest or frigidity, possibly stemming from the flower's historical association with rejection.
    • Understanding: The diverse shape and color of hydrangea flowers can also be symbolic of diversity and a deep understanding of someone's complex nature.

💧
Every 2-3 days
Water
☀️
2500 - 10000 Lux
Light
💦️
6%
Humidity
🪴
Every 2-3 years
Repotting
🌱️
Late summer to autumn
Propogation
✂️️
As needed
Pruning
  • water dropWater

    Rough-leaf Hydrangea should be watered deeply once a week, providing about 1 inch of water each time, which would be approximately 0.623 gallons for a medium-sized plant. During hot or dry periods, increase the frequency to twice a week. Ensure the soil is moist but not saturated, as overwatering can lead to root rot. The watering method should aim at the base of the plant to avoid wetting the foliage, which can lead to fungal diseases.

  • sunLight

    Rough-leaf Hydrangea thrives best in partial shade with some morning sunlight and afternoon protection from the intense sun. An ideal spot would be on the east side of a building or beneath the light shade of tall trees. Avoid placing it in deep shade or full sun as this can stress the plant and affect blooming.

  • thermometerTemperature

    Rough-leaf Hydrangea prefers moderate temperatures and can typically survive in a range between 30°F and 80°F. Ideally, the temperature should be maintained between 60°F and 70°F for optimal growth. It is important to protect the plant from frost by providing mulch or shelter if temperatures are expected to drop below the minimum threshold.

  • scissorsPruning

    Prune Rough-leaf Hydrangea to maintain shape and encourage vigorous growth, ideally in late winter or early spring before new growth begins. Old, weak, or dead stems should be removed annually. Pruning can also help promote more abundant blooms the following season. It is not necessary to prune every stem, as the plant blooms on old wood.

  • broomCleaning

    As needed

  • bambooSoil

    Rough-leaved Hydrangea thrives best in moist, well-draining soil, rich in organic matter. A balanced soil mix composed of two parts loam, one part peat or compost, and one part sharp sand or perlite provides a good structure. The ideal soil pH for Rough-leaved Hydrangea ranges from acidic to neutral, around 5.0 to 6.5, which can influence the flower color.

  • plantRepotting

    Rough-leaved Hydrangea should be repotted every 2-3 years or when it outgrows its current pot. It's best to repot in late winter or early spring before the active growth season begins.

  • water dropsHumidity & Misting

    Rough-leaved Hydrangea prefers moderate to high humidity levels, ideally between 40-60%. These conditions support healthy growth and lush foliage and can be achieved with regular misting or a humidity tray if grown indoors.

  • pinSuitable locations

    • Indoor

      Provide filtered light and keep soil moist for Rough-leaved Hydrangea.

    • Outdoor

      Plant in partial shade, mulch well, and ensure soil drainage for Rough-leaved Hydrangea.

    • Hardiness zone

      7-9 USDA

  • circleLife cycle

    Hydrangea aspera, commonly known as rough hydrangea, begins its life cycle when its seeds germinate in moist soil in the spring, requiring partial to full shade. After sprouting, the seedlings grow, forming large leaves and woody stems as they develop into mature shrubs over the course of several years. During the summer months, the mature rough hydrangea produces clusters of pale pink to blue inflorescences surrounded by larger, showier sterile flowers that attract pollinators. After pollination, these flowers can develop into small capsule-like fruits containing numerous seeds, completing the reproductive cycle. In autumn, the leaves of the rough hydrangea may change color before falling off as the plant enters dormancy for winter. Each year, the shrub may grow larger and produce more flowers, with a life span that can extend over many years if it's well cared for in a garden setting.

  • sproutPropogation

    • Propogation time

      Late summer to autumn

    • Propogation: The most popular method of propagating Hydrangea aspera, commonly known as rough-leaf hydrangea, is through softwood cuttings taken in early summer. To propagate using this method, choose a healthy, non-flowering stem and cut a 4 to 6 inch (approximately 10 to 15 centimeters) section. Make sure the cutting has at least two pairs of leaves. Dip the bottom end of the cutting in rooting hormone, which helps to stimulate root growth. Plant the cutting in a pot with moist, well-draining potting mix, ensuring the lower set of leaves is just above the surface. Cover the pot with a plastic bag or place it in a greenhouse to maintain high humidity around the cutting. Keep the soil moist but not waterlogged and wait several weeks for roots to develop before transplanting the cutting to a larger pot or outdoor location.