Azalea Rhododendron (Obtusum Group) 'Hinomayo' (EA)

☠ Toxic to humans
🐾 Toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Hard-care
rhododendron 'Hinomayo'


Azalea 'Hinomayo' is a visually striking shrub renowned for its ornamental features. This azalea variety showcases a profusion of blossoms that make it a garden standout, especially during its peak blooming period. The flowers of the 'Hinomayo' azalea are characterized by their delicate, funnel-shaped structure with lightly ruffled edges. These blooms come in a captivating soft pink hue that adds a gentle splash of color wherever the plant is situated. The blossoms might give off a subtle fragrance that can make walking near the shrub a sensorial delight. Adding to the overall appeal of the azalea 'Hinomayo' are its leaves, which are small to medium in size with a glossy, deep green color. Their shape is typically oval to elliptical, providing a lush backdrop for the bright flowers. The leaves may steer into a bronzy tone in fall, providing seasonal interest and a contrast to the past season's floral display. The azalea 'Hinomayo' has a growth habit that forms a dense and spreading mound. This shape is due to its numerous branches that create a full silhouette, giving it a bushy and substantial look. The combination of its exquisite blooms, attractive foliage, and pleasing growth habit make this azalea a desirable addition to various garden settings, particularly in areas where its beauty can be fully appreciated up close.

Plant Info
Common Problems

About this plant

  • memoNames

    • Family


    • Synonyms

      Hinomayo Azalea, Evergreen Azalea

    • Common names

      Rhododendron obtusum 'Hinomayo', Rhododendron 'Hinomayo', Azalea 'Hinomayo'

  • skullToxicity

    • To humans

      Azalea, including the 'Hinomayo' variety, contains grayanotoxins that can pose a health risk if ingested. In humans, poisoning from azaleas may cause symptoms such as nausea, vomiting, weakness, dizziness, difficulty breathing, and lowered blood pressure. In severe cases, ingestion can lead to coma or death, especially without prompt medical treatment.

    • To pets

      Azalea is also toxic to pets, such as dogs and cats. The plant contains grayanotoxins, which can cause symptoms ranging from gastrointestinal upset, such as vomiting and diarrhea, to more severe signs like drooling, loss of coordination, weakness, and cardiac failure. Ingestion of azalea parts in significant quantities can lead to serious health complications and can be fatal for pets if not treated promptly.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      2 feet (0.61 meters)

    • Spread

      2 feet (0.61 meters)

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Ornamental Appeal: Produces vibrant pink flowers that add aesthetic value to gardens and landscapes.
    • Wildlife Attraction: Attracts pollinators such as bees and butterflies, supporting local ecosystems.
    • Erosion Control: Helps stabilize soil on slopes, reducing the risk of erosion.
    • Shade Tolerance: Can thrive in partially shaded areas, offering landscaping options for spots with less sunlight.
    • Seasonal Interest: Offers year-round interest with evergreen foliage and seasonal blossoms.
    • Cultural Significance: Often used in traditional gardening and associated with various cultural practices and ceremonies.
    • Privacy Screen: Dense growth habit can be used to create natural privacy barriers in residential areas.
    • Hardiness: Resilient to a variety of climates, making it suitable for many garden zones.
    • Low Maintenance: Requires minimal care once established, making it a practical choice for busy gardeners.

  • 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

    • Culinary Garnish: Blossoms from the Rhododendron 'Hinomayo' can be used to garnish salads and desserts, but only if they are confirmed non-toxic and free of pesticides.
    • Photography: Due to its striking flowers, Rhododendron 'Hinomayo' is often used as a subject for botanical photography and art.
    • Dye Production: The flowers may be used to produce natural dyes for fabrics, though they tend to produce subtle and delicate hues.
    • Festival Decor: In some cultures, branches and blooms of Rhododendron 'Hinomayo' are used in festivals and ceremonies as decoration.
    • Educational Tool: This plant can serve as a learning tool for horticultural students and nurseries to study plant care and breeding techniques.
    • Aromatherapy: Although not typically noted for their fragrance, the flowers can be incorporated into potpourri mixes for a mild aroma.
    • Landscape Value: Aside from its typical ornamental uses, it can serve as a shelter plant for small wildlife in the garden.
    • Insect Attraction: Rhododendron 'Hinomayo' can help attract pollinators such as bees and butterflies to the garden for promoting biodiversity.
    • Artistic Inspiration: Its vibrant flowers often inspire artists and are used as motifs in textile designs, wallpaper, and other home decor items.
    • Specialty Compost: Fallen leaves and spent blooms can be collected and added to compost bins, contributing to nutrient-rich compost.

Interesting Facts

  • bedFeng Shui

    The Azalea is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    The Azalea is not used in astrology practice.

  • spiralPlant Symbolism

    • Caution or Danger: Rhododendrons can be toxic if ingested, which is why in some cultures they symbolize caution or a warning to beware.
    • Elegance and Wealth: The beautiful flowers and their association with stately gardens can represent elegance and wealth.
    • Homecoming and Wandering: In certain regions, rhododendrons symbolize homecoming and wandering, as they are often seen in the mountains where travelers pass by.

Every 7-10 days
2500 - 10000 Lux
Every 2-3 years
Early Spring
As needed
  • water dropWater

    For the Azalea 'Hinomayo', it is important to maintain a consistently moist soil without it becoming waterlogged. Water the plant deeply when the top inch of the soil feels dry to the touch, which may be once or twice a week depending on environmental conditions such as temperature and humidity. In general, giving the plant about 1 gallon of water per week should be adequate, adjusting for rainfall and climate variations. During the growing season, the watering frequency may increase, while in the winter, when the plant is dormant, you should reduce the amount of water. Always use a gentle flow to avoid disturbing the soil and roots, and water at the base of the plant to keep the leaves dry.

  • sunLight

    Azalea 'Hinomayo' thrives in partial shade conditions, where it can get some gentle morning sunlight but is protected from the strong afternoon rays. An ideal spot would be under the canopy of larger trees that allows dappled sunlight to filter through, or on the north or east side of a building where it can receive bright, indirect light. Full sun can be tolerated in cooler climates, but in hotter regions, the intense sunlight can damage the foliage and flowers.

  • thermometerTemperature

    Azalea 'Hinomayo' prefers moderate temperatures and can typically handle a range between 20°F and 80°F. However, the ideal temperature range for robust growth and flowering is between 50°F and 70°F. Protect the plant from extremes of heat by providing shade in summer, and ensure adequate mulching to insulate the roots against cold winters. Extended periods of temperatures below 20°F or above 80°F can stress the plant and may require protective measures.

  • scissorsPruning

    Prune Azalea 'Hinomayo' soon after it has finished blooming to shape the plant and remove any dead or diseased branches, as well as spent flower clusters to encourage next year's bloom. Pruning too late in the season can remove the buds set for the next year, so timing is crucial. Normally, pruning once a year is sufficient unless shaping is required or to remove occasional damaged wood. Always use clean, sharp tools to make precise cuts and minimize stress to the plant.

  • broomCleaning

    As needed

  • bambooSoil

    Azaleas, such as 'Hinomayo', thrive best in a well-draining, acidic soil mix with a pH of 4.5 to 6.0. A suitable mix could be composed of 50% pine bark, 30% peat moss, and 20% perlite or coarse sand to ensure proper drainage and aeration. Additionally, incorporating a slow-release fertilizer formulated for acid-loving plants can provide essential nutrients.

  • plantRepotting

    Azaleas like 'Hinomayo' should be repotted every 2 to 3 years or when they become root-bound. The best time to repot is during late winter or early spring, just before new growth begins. Use a slightly larger pot with fresh acidic soil to encourage renewed growth and maintain plant health.

  • water dropsHumidity & Misting

    Azaleas, including 'Hinomayo', prefer moderate to high humidity levels, ideally between 50-60%. Achieving this humidity can be accomplished by using a humidifier, placing a water tray with pebbles beneath the plant container, or regularly misting the surrounding air, but not the foliage directly to prevent fungal diseases.

  • pinSuitable locations

    • Indoor

      Ensure bright, indirect light and keep soil moist but not soggy.

    • Outdoor

      Plant in dappled shade, shelter from strong winds.

    • Hardiness zone

      6-9 USDA

  • circleLife cycle

    The 'Hinomayo' Azalea, a member of the Rhododendron (Obtusum Group), begins its life cycle when a seed germinates in a moist, well-drained substrate, typically in a shaded or partially shaded environment. The seedling emerges and develops into a young plant, gradually growing a root system and foliage through the juvenile stage. As it matures, the Azalea will enter the vegetative stage, producing a dense shrub with glossy leaves. Once the plant reaches maturity, it enters the flowering stage, typically in spring, producing characteristic pink to red flowers that attract pollinators. After pollination, flowers develop into seed pods, which will eventually release seeds, potentially giving rise to new plants. In addition to sexual reproduction, 'Hinomayo' Azaleas can also propagate through cuttings, which can root and develop into clones of the parent plant.

  • sproutPropogation

    • Propogation time

      Early Spring

    • Propogation: The most popular method of propagation for the Azalea 'Hinomayo' is through semi-hardwood cuttings. This process is generally done in the late summer, after the blooms have faded and the new growth has started to mature and harden slightly. Cuttings should be about 4 to 6 inches (10 to 15 centimeters) long and include several sets of leaves. The bottom set of leaves is removed, and the cut end is dipped in rooting hormone before being placed in a well-draining rooting medium such as a mix of peat and perlite. The cuttings are then kept moist and in a well-lit area, but out of direct sunlight, until roots have developed, which generally takes several weeks.