Rhododendron Rhododendron 'Solidarity'

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


Rhododendron 'Solidarity' is a visually striking plant known for its lush foliage and vibrant flowers. The leaves of this Rhododendron are dark green, glossy, and leathery, creating a dense backdrop for its blossoms. The foliage can vary in shape but commonly has an elongated oval form with a slightly curled edge, contributing to the plant's overall texture. The flowers are the most eye-catching feature of Rhododendron 'Solidarity'. They typically bloom in clusters known as trusses, creating a very full and rounded appearance. Each truss is a magnificent display of individual bell-shaped flowers. The flowers themselves are large and often boast a vivid color spectrum that can range from pure white to deep purple, with many variations in between, including pinks and reds. Some Rhododendron 'Solidarity' may have flowers adorned with speckles or markings in a contrasting hue, which adds to their ornamental charm. The overall impression of Rhododendron 'Solidarity' is that of a robust and colorful plant, with a lush, evergreen presence and a profusion of stunning flowers that make it a standout addition to any garden where it provides a spectacular display when in bloom.

Plant Info
Common Problems

About this plant

  • memoNames

    • Family


    • Synonyms

      Solidarity Rhododendron, Solidarity Azalea

    • Common names

      Rhododendron 'Solidarity'.

  • skullToxicity

    • To humans

      Rhododendron 'Solidarity', commonly known as rhododendron, is toxic to humans. All parts of the plant contain substances known as grayanotoxins, which can cause poisoning if ingested. Symptoms of rhododendron poisoning may include vomiting, diarrhea, drooling, weakness, confusion, hypotension (abnormally low blood pressure), and cardiac problems. In severe cases, ingestion could lead to coma or death, although such extreme reactions are rare. It is essential to seek immediate medical attention if someone has consumed any part of a rhododendron plant.

    • To pets

      Rhododendron, including the 'Solidarity' variety, is toxic to pets, including dogs, cats, and horses. The plant contains grayanotoxins, which can interfere with normal skeletal muscle, cardiac muscle, and nerve function. If a pet ingests rhododendron, symptoms could include vomiting, diarrhea, hypersalivation, weakness, incoordination, cardiovascular collapse, and potentially coma. In severe cases, it can be fatal. Prompt veterinary care is crucial if a pet has ingested any part of a rhododendron plant.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      4-5 feet (1.2-1.5 meters)

    • Spread

      4-6 feet (1.2-1.8 meters)

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Ornamental Appeal: The Rhododendron 'Solidarity' is prized for its large, showy blooms that add vibrant colors to gardens and landscapes.
    • Biodiversity: Rhododendrons increase plant diversity in gardens, which can support a wider range of insects and birds.
    • Suitable for Shaded Areas: They can thrive in partial shade, making them ideal for under-canopy and north-facing gardens.
    • Seasonal Interest: Rhododendrons provide a burst of color in the spring when many other plants have yet to bloom.
    • Erosion Control: Their root systems can help stabilize soil on slopes and prevent erosion.
    • Privacy: When planted in a group, they can form dense screens that offer privacy and reduce noise pollution.
    • Low Maintenance: Once established, they require minimal care beyond occasional watering and pruning.
    • Habitat for Wildlife: These plants can provide shelter and nesting sites for birds and small mammals.
    • Longevity: Rhododendrons are known to be long-lived plants, providing benefits for many years.

  • 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

    • Ink Production: The dark pigments in some Rhododendron flowers can be used to make natural dyes or inks for art and craft purposes.
    • Floral Arrangements: Rhododendron blooms are often used in bouquets and floral arrangements for their vibrant colors and large, showy flowers.
    • Photography Subject: Rhododendrons, with their lush blooms, provide a perfect subject for nature photography, especially macro photography.
    • Education: They can be used in botanical studies and horticulture programs to educate students about plant hybridization and care.
    • Culinary Garnish: While not widely known as an edible, some cultures use Rhododendron petals as a decorative, non-toxic garnish for culinary dishes.
    • Religious Ceremonies: In certain cultures, Rhododendron flowers are used in religious ceremonies as symbols of purity and beauty.
    • Fragrance Extraction: The scent of some Rhododendron varieties can be extracted and used in perfumery, though this is not common practice.
    • Natural Art Supplies: Children can use Rhododendron blooms and leaves to create natural art, such as pressing flowers or leaf rubbings.
    • Beekeeping Attractant: Rhododendron plants can be used to attract bees for honey production, although their nectar can sometimes create toxic honey if not managed properly.
    • Symbolic Gift: Rhododendrons can be given as a gift to symbolize caution, due to the toxic nature of the plant, or to represent one's passion for horticulture and gardening.

Interesting Facts

  • bedFeng Shui

    The Rhododendron is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    The Rhododendron is not used in astrology practice.

  • spiralPlant Symbolism

    • Caution - Rhododendrons are known to be toxic, and therefore they symbolize caution or beware.
    • Temperance - The plant's preference for cooler climates is often associated with moderation and restraint.
    • Abundance - With their lush, voluminous blooms, rhododendrons can symbolize abundance and wealth.
    • Beauty and Attraction - The stunning flowers of the rhododendron represent beauty and can be a symbol of one's attractiveness.

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

    Azaleas, including the Rhododendron 'Solidarity', prefer consistently moist but well-drained soil. They should be watered deeply once a week, providing about 1 inch of water each time, which is equivalent to approximately 0.6 gallons per square foot of planting area. During hot or dry spells, the frequency may need to increase to twice per week. It's important to avoid overhead watering to prevent fungal diseases and instead water directly at the base of the plant. Overwatering or allowing the soil to remain waterlogged can lead to root rot, so ensure the soil can drain excess water properly.

  • sunLight

    Azaleas thrive in dappled sunlight or partial shade. The Rhododendron 'Solidarity' should be planted where it can receive morning sunlight and afternoon shade, as direct afternoon sun can scorch the leaves. An ideal spot is under the canopy of tall trees that provide filtered light, mimicking the azalea's natural habitat on the forest floor.

  • thermometerTemperature

    Azaleas, like Rhododendron 'Solidarity', prefer moderate temperatures and can generally withstand minimum temperatures down to 20°F, though there may be variations depending on the specific cultivar. They are most comfortable in temperatures between 50°F and 70°F. Azaleas can suffer heat stress above 80°F, so providing some shade during the hottest part of the day can help manage high temperatures.

  • scissorsPruning

    Pruning azaleas, like Rhododendron 'Solidarity', is important to maintain shape, encourage bushiness, and remove dead or diseased wood. It's best to prune them immediately after they finish blooming in spring, as pruning later can remove next year's buds. Deadheading, or removing spent flowers, can enhance the appearance and prevent energy going into seed formation.

  • broomCleaning

    As needed

  • bambooSoil

    Azaleas, such as Rhododendron 'Solidarity', require an acidic soil mix with a pH of 4.5 to 6.0. A good soil recipe would be equal parts of peat moss, pine bark, and perlite to ensure proper drainage and aeration. Regular checks to maintain the acidic pH are crucial for the plant’s health.

  • plantRepotting

    Azaleas, including Rhododendron 'Solidarity', should be repotted every 2 to 3 years or when they outgrow their pots. Spring is the best time for repotting, right before they enter their active growth phase.

  • water dropsHumidity & Misting

    Keeping Azaleas like Rhododendron 'Solidarity' at a humidity level of around 50-60% is ideal. They benefit from higher humidity but it is not mandatory for their survival.

  • pinSuitable locations

    • Indoor

      Place Rhododendron 'Solidarity' in bright, indirect light.

    • Outdoor

      Plant Rhododendron 'Solidarity' in partial shade.

    • Hardiness zone

      5-8 USDA

  • circleLife cycle

    The Rhododendron 'Solidarity' begins its life cycle as a seed, typically requiring stratification to break dormancy before germinating in favorable conditions of moisture and temperature. Upon germination, it develops into a seedling with a root system and cotyledons, before true leaves emerge, allowing it to photosynthesize. As the seedling matures, it grows into a young plant, establishing a more extensive root system and foliage, and eventually starts to form woody stems. The young rhododendron gradually matures into an adult plant capable of flowering; in optimal conditions, it will produce showy blooms annually, typically in the spring. After pollination, flowers develop into seed capsules that, when mature, release seeds to start the next generation. Throughout its life, it goes through cycles of dormancy and active growth, with leaves that may persist across seasons in milder climates, as most rhododendrons are evergreen.

  • sproutPropogation

    • Propogation time

      Spring-Early Summer

    • The Rhododendron, commonly referred to as the Azalea, is best propagated through several methods depending on the time of year, but the most popular and effective method is semi-hardwood cuttings. This technique is typically carried out in the late summer after the plant has finished blooming and the new growth has begun to harden. Cuttings should be taken from healthy, disease-free plants, and it's important to choose semi-hardwood stems, which are matured enough but not fully hardened. The cuttings, usually 4 to 6 inches (10 to 15 centimeters) in length, are treated with a rooting hormone to encourage root development and then planted in a mixture of perlite and peat for optimal rooting conditions. They should be kept in a humid environment until roots have established, which can take several weeks. Once rooted, the cuttings can be transferred into individual pots to continue growing before eventual transplanting into the garden.