Rhododendron Rhododendron 'The Honourable Jean Marie de Montague'

☠ Toxic to humans
🐾 Toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Hard-care
rhododendron 'The Honourable Jean Marie de Montague'


The Rhododendron 'The Honourable Jean Marie de Montague' is an ornamental plant known for its striking, showy flowers. This rhododendron has glossy, dark green leaves that provide a lush backdrop for its blooms. The plant is renowned for its large flower clusters, known as trusses, which can be a vivid, deep red in color. When in bloom, the flowers are tubular-bell-shaped and typically have a contrasting black marking within the throat that enhances the overall attractiveness of the blooms. The petals are somewhat wavy and may have a subtle sheen, catching the light and adding to the visual impact of the plant. Overall, this rhododendron is prized for its vibrant and profuse flowering, making it a standout in any landscape where it is cultivated.

Plant Info
Common Problems

About this plant

  • memoNames

    • Synonyms

      Red Rhododendron, Jean Marie de Montague Rhododendron

    • Common names

      Rhododendron 'The Honourable Jean Marie de Montague'

  • skullToxicity

    • To humans

      Rhododendron poisoning can be serious, as all parts of the plant contain toxic compounds known as grayanotoxins. Ingesting any part of the rhododendron can result in symptoms such as vomiting, diarrhea, drooling, and abdominal pain. More severe symptoms may also manifest, including a drop in blood pressure, coma, and in extreme cases, death. Consumption of rhododendron plant material should be avoided, and medical attention should be sought immediately if ingestion occurs.

    • To pets

      Rhododendron is toxic to pets, with all parts of the plant containing grayanotoxins that can cause poisoning. In pets, symptoms of rhododendron poisoning may include vomiting, diarrhea, hypersalivation, weakness, and in severe cases, cardiac failure or potentially life-threatening drops in blood pressure. Immediate veterinary care is critical if a pet ingests rhododendron, as poisoning can be severe and potentially fatal.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves

      Dark green

    • Flower color


    • Height

      5 feet (1.5 meters)

    • Spread

      5 feet (1.5 meters)

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Aesthetically Pleasing: This Rhododendron, commonly known as 'The Honourable Jean Marie de Montague', offers vibrant red flowers that enhance the visual appeal of gardens and landscapes.
    • Attracts Wildlife: The bright blooms attract pollinators such as bees and butterflies, promoting biodiversity in the garden.
    • Shade Tolerance: It is capable of growing in partially shaded areas, making it versatile for different garden designs.
    • Seasonal Interest: With its spring blossoms, it provides a seasonal focal point and marks the change from spring to summer.
    • Low Maintenance: Once established, Rhododendrons require minimal care, making them suitable for both novice and experienced gardeners.
    • Erosion Control: The plant's root system can help stabilize soil on slopes, reducing the risk of erosion.
    • Privacy Screening: Dense foliage makes it an excellent choice for creating natural privacy screens or hedges.
    • Habitat Creation: It can serve as shelter for small animals and birds within its dense branches and foliage.

  • 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

    • The bright flowers of Rhododendron 'The Honourable Jean Marie de Montague' can be used as a natural dye for fabrics, offering hues of pink and purple depending on the mordant used.
    • This Rhododendron's dried petals can be incorporated into potpourris for a splash of color and a subtle, floral fragrance in home decoration.
    • The plant’s high nectar production makes it an excellent choice for attracting pollinators like bees and butterflies to support a healthy garden ecosystem.
    • Its dense foliage can serve as a natural privacy screen or windbreak when planted in a hedge or shrub border.
    • The Rhododendron’s large, evergreen leaves can be used in floral arrangements as a lasting and vivid green backdrop for cut flowers.
    • Photographers and artists may utilize the plant as a striking subject for their compositions due to its vibrant blooms and structured form.
    • The species can be cultivated for bonsai, offering enthusiasts a challenge due to its larger leaf size, requiring careful pruning and training to create miniature landscapes.
    • During off-seasons, its bark and branches can provide interesting textures for winter gardens when flowers are not in bloom.
    • Educational institutions might use the plant as a teaching tool to discuss topics like plant propagation, hybridization, and rhododendron care.
    • Landscape designers often use Rhododendron 'The Honourable Jean Marie de Montague' as a focal point in thematic gardens, such as Victorian or woodland settings.

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

    • Warning: Rhododendron, in general, can symbolize caution or danger due to some species containing toxic substances that can be harmful if ingested.
    • Beware: Similar to the warning, this symbolism stresses the need for careful handling or avoidance of a potentially hazardous situation, mirroring the plant’s toxicity.
    • Beauty and Elegance: The Rhododendron, with its stunning flowers and lush foliage, often represents beauty and elegance, reflecting its attractive appearance and its cultivation in ornamental gardens.
    • Abundance: The plentiful blooms of the Rhododendron can symbolize abundance or wealth, perhaps in relation to nature's bounty or personal success.
    • Survival: Some species of Rhododendron are known for their hardiness and ability to survive in challenging conditions, so they may symbolize perseverance and resilience.
    • Passion: The vibrant colors of the Rhododendron flowers can be associated with passion and energy, often inspiring feelings of enthusiasm and zeal.

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

    Rhododendrons, like 'The Honourable Jean Marie de Montague', should be watered thoroughly and deeply when the top inch of soil feels dry to touch. Depending on weather conditions, this might be once a week, especially during the plant's active growth in spring and summer. Rhododendrons require a steady moisture level, so be consistent and avoid letting the soil dry out completely. Use rainwater if possible, as it has the acidity that rhododendrons prefer. When watering, aim to apply about one gallon of water per foot of plant height to ensure the moisture reaches deep into the root zone.

  • sunLight

    Rhododendrons, such as 'The Honourable Jean Marie de Montague', prefer dappled sunlight or partial shade. Ideally, plant them in a location where they can be protected from harsh afternoon sun, which can burn their leaves. Morning light and filtered afternoon light are best to maintain the health and blooming potential of the shrub.

  • thermometerTemperature

    Rhododendrons, including 'The Honourable Jean Marie de Montague', thrive in temperate climates and can generally handle temperatures as low as 20°F and as high as 80°F, with their ideal growing range being between 50°F and 75°F. They benefit from winter protection if temperatures drop below the 20°F threshold, but excessive heat above 80°F can also stress the plant.

  • scissorsPruning

    Pruning 'The Honourable Jean Marie de Montague' rhododendron is essential to maintain its shape and to remove dead or diseased wood. It is best done soon after the blooming period, typical in late spring, as pruning later can remove the next season's flower buds. Lightly trim back the branches, and always cut just above a growth node or whorl of leaves.

  • broomCleaning

    As needed

  • bambooSoil

    Rhododendrons, such as 'The Honourable Jean Marie de Montague', require well-draining, acidic soil with a pH of 4.5 to 6.0. A mix of 50% pine bark, 40% peat moss, and 10% perlite is optimal to ensure proper drainage and aeration. Regularly test and amend the soil to maintain the necessary acidity.

  • plantRepotting

    Rhododendrons including 'The Honourable Jean Marie de Montague' generally require repotting every 2 to 3 years. They should be repotted when they outgrow their current container or when the soil becomes depleted and compacted, impeding drainage and aeration.

  • water dropsHumidity & Misting

    'The Honourable Jean Marie de Montague' Rhododendron thrives in moderate to high humidity levels. Aim to maintain a humidity level of 50-60% around the plant for optimal growth. Avoid placing it in very dry conditions which can cause stress to the plant.

  • pinSuitable locations

    • Indoor

      Place in bright, indirect light and ensure high humidity.

    • Outdoor

      Partial shade, sheltered, well-drained acidic soil.

    • Hardiness zone

      5-8 USDA

  • circleLife cycle

    Rhododendron 'The Honourable Jean Marie de Montague' begins its life as a seed, often requiring cold stratification to break dormancy before germination can occur in spring. Once germinated, the seedling stage is characterized by initial root and shoot development until it can be transplanted or naturally establishes itself in the soil. The vegetative stage follows, during which the plant experiences significant growth in leaves and branches, building a robust framework for future flowering, generally taking several years before the first flowers appear. The flowering stage occurs annually, typically in late spring, when it produces vibrant blooms that are attractive to pollinators, after which fertilized flowers may develop into seed capsules. As a perennial, this rhododendron will enter a period of dormancy in winter, during which growth slows or stops, and the plant may shed some leaves depending on the climate. Throughout its life, which can span many decades with proper care, the plant will experience cycles of growth, flowering, and dormancy, with occasional pruning needed to maintain shape and encourage rejuvenation.

  • sproutPropogation

    • Propogation time

      Spring-Early Summer

    • For the Rhododendron 'The Honourable Jean Marie de Montague', a popular method of propagation is softwood cuttings. This method involves taking a cutting from new growth when it is still flexible but has begun to harden, which typically occurs in late spring to early summer. The cutting should be about 4 to 6 inches long, with the lower leaves removed. It is often dipped in rooting hormone to enhance root development and placed in a well-draining potting mix. The cutting should be kept in a humid environment, either by placing a plastic bag over the pot or using a mist system, until roots have developed, which usually takes several weeks.