Rhododendron Rhododendron (Tessa Group) 'Tessa Roza'

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


'Tessa Roza' is a cultivar from the Tessa Group of Rhododendrons, well known for their vividly colored flowers. This particular variety sports stunning blooms that are of a bright pink hue, often with darker pink spots that can add depth and contrast to the flower's appearance. The blooms are trumpet-shaped, a characteristic feature of many Rhododendrons, and they often cluster together to form a striking, dense inflorescence that is visually appealing and can draw attention from a distance. The leaves of 'Tessa Roza' are typically dark green, providing a lush backdrop for the vibrant floral display. The foliage tends to be glossy, with a leathery texture that is pleasant to touch. The leaves may also be elongated, coming to a point at the tip, and they often curl slightly at the edges, adding to the plant's overall texture and visual interest. The overall appearance of 'Tessa Roza' is one of vibrancy and natural elegance, with the contrast between the dark green foliage and the bright pink flowers creating a captivating display that can be a focal point in any garden setting. Its aesthetic appeal lies not just in the coloration, but also in the arrangement of its blooms and the polished look of its leaves.

Plant Info
Common Problems

About this plant

  • memoNames

    • Synonyms

      Tessa Roza Rhododendron, Tessa Group Rhododendron.

    • Common names

      Rhododendron (Tessa Group) 'Tessa Roza'.

  • skullToxicity

    • To humans

      Rhododendrons, including 'Tessa Roza', contain grayanotoxins which can be toxic when ingested. They can cause symptoms such as vomiting, diarrhea, hypersalivation, weakness, coma, hypotension, central nervous system depression, cardiovascular collapse, and potentially death. It's important to seek medical attention immediately if any parts of the plant are consumed.

    • To pets

      Rhododendrons are also toxic to pets, including dogs and cats. The presence of grayanotoxins can lead to severe symptoms such as vomiting, diarrhea, drooling, weakness, collapse, hypotension, depression, tremors, seizures, and potentially death. Immediate veterinary care is crucial if a pet consumes any part of the plant.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      4 feet (1.2 meters)

    • Spread

      4 feet (1.2 meters)

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Ornamental Value: Rhododendrons are widely appreciated for their vibrant blossoms that come in a variety of colors, adding aesthetic appeal to gardens and landscapes.
    • Landscaping: Their large, evergreen leaves and the ability to form thick bushes make them ideal for creating hedges, borders, and privacy screens.
    • Attracts Wildlife: The bright flowers of Rhododendrons are attractive to pollinators such as bees, butterflies, and birds, thereby supporting biodiversity.
    • Shade Tolerant: Rhododendrons can thrive under the canopy of taller trees, making them suitable for woodland gardens and shaded areas where other plants might struggle.
    • Durable: Once established, they are relatively hardy and can endure cold temperatures, making them suitable for a variety of climates.
    • Variety of Sizes: Rhododendrons come in different sizes, from small dwarf varieties to large shrubs, providing options for different garden scales and uses.
    • Year-Round Interest: Because many are evergreen, rhododendrons provide visual interest throughout the year, even outside of the flowering season.
    • Low Maintenance: They require minimal pruning compared to some other ornamental plants, making them a low-maintenance option for busy gardeners.
    • Soil Improvement: Like other members of the Ericaceae family, they can help to acidify the soil, benefiting other acid-loving plants when grown in proximity.

  • 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

    • Photography Prop: The vibrant colors of rhododendrons can serve as a compelling background in macro and nature photography, providing a splash of color that enhances the visual appeal of photos.
    • Natural Dye: The petals of some rhododendron varieties can be used to produce natural dyes for fabric and yarn, giving them soft, subtle hues.
    • Artistic Inspiration: Artists often use rhododendrons as a subject for paintings, drawings, and other forms of artwork due to their picturesque blooms.
    • Educational Tool: Rhododendrons can be used in educational settings to teach students about plant biology, hybridization, and the importance of plant diversity in ecosystems.
    • Festival Decorations: Rhododendron flowers are sometimes used in festivals or cultural events for decorating venues due to their impressive and colorful blooms.
    • Scented Products: Although not widely known for their fragrance, the subtle scent of some rhododendron flowers can be captured to make scented candles, potpourri, or sachets.
    • Food Garnishing: In some cultures, rhododendron petals that are known to be non-toxic can be used to garnish salads and desserts.
    • Crafting Material: Dried rhododendron blooms can be incorporated into various crafts, such as making homemade paper or potpourri arrangements.
    • Watercolor Extract: The petals of rhododendrons can be crushed to extract a watercolor-like pigment that can be used for painting or as a colorant in papermaking.
    • Beekeeping Attractant: Rhododendrons can attract bees, and some beekeepers plant them nearby to encourage pollinator activity and support honey production.

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 and Danger: Rhododendrons can be toxic if ingested, which has led to them symbolizing caution and danger as a warning to be aware of their poisonous nature.
    • Beauty and Attraction: With their showy, large blooms, rhododendrons are often associated with beauty and are used to attract attention in gardens and landscapes.
    • Abundance and Wealth: The full, lush appearance of the rhododendron's foliage and flowers can represent abundance and wealth.
    • Elegance and Sophistication: Rhododendrons are regarded as sophisticated flowers often found in formal gardens, symbolizing elegance.
    • Survival and Resilience: Able to thrive in a variety of climates, rhododendrons symbolize survival and the ability to overcome adversity.

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

    Rhododendrons, including 'Tessa Roza', require consistent moisture and should not be allowed to dry out completely, especially during their growth and blooming period. They prefer a well-drained soil that is kept evenly moist. Water the plant with about 1 inch of water per week. During hot or dry weather, this may need to be increased to maintain the soil's moisture level. Avoid overhead watering to prevent disease and instead opt for drip irrigation or watering at the base of the plant.

  • sunLight

    Rhododendrons like 'Tessa Roza' thrive in dappled shade or part sun. Ideally, they should be planted in a location that receives morning sunlight and is protected from the harsh afternoon sun. Filtered sunlight beneath tall trees often provides the perfect light conditions for these plants to flourish.

  • thermometerTemperature

    Rhododendrons, such as 'Tessa Roza', are hardy and can withstand temperatures as low as 20°F but may be damaged by temperatures below this. They perform best in temperatures between 50°F and 70°F. Rhododendrons should be protected from extreme temperatures, both hot and cold, to prevent stress and promote healthy growth.

  • scissorsPruning

    Prune 'Tessa Roza' rhododendrons immediately after they have finished blooming to maintain their shape and encourage new growth. This typically occurs in late spring or early summer. Remove any dead or diseased wood, and selectively thin out dense areas to improve air circulation. Light pruning can encourage bushier growth and more abundant blooms in the following season.

  • broomCleaning

    As needed

  • bambooSoil

    Rhododendrons require well-draining, acidic soil with a pH of 4.5 to 6.0. A mix of 50% peat moss or ericaceous compost, 30% pine bark, and 20% perlite or coarse sand is ideal for 'Tessa Roza' to thrive.

  • plantRepotting

    Rhododendrons like 'Tessa Roza' typically need repotting every 2-3 years, or when the root system outgrows the current container, to ensure continued health and growth.

  • water dropsHumidity & Misting

    Rhododendrons, including 'Tessa Roza', prefer moderate to high humidity levels, ideally between 40% to 60%, to maintain their health and vibrant blooms.

  • pinSuitable locations

    • Indoor

      Position 'Tessa Roza' in bright, indirect light with controlled humidity.

    • Outdoor

      Plant 'Tessa Roza' in dappled shade, sheltered from strong winds.

    • Hardiness zone

      5-9 USDA

  • circleLife cycle

    Rhododendron 'Tessa' begins its life cycle as a seed, usually germinating in a moist, well-drained medium with some acidity to the soil. After germination, the seedling develops into a young plant with characteristic glossy, leathery leaves and may take several years to reach maturity where it can bloom. Once mature, the rhododendron typically blooms in late spring to early summer, producing clusters of trumpet-shaped flowers that vary from pink to red hues. After pollination, often aided by bees and other insects, the flowers develop into seed pods which eventually dry and release seeds to start a new generation. Outside its flowering period, the plant enters a vegetative state where it focuses on growth and the storage of energy throughout the remaining seasons, especially important to survive the winter dormancy period. This cycle of growth, flowering, and dormancy repeats annually throughout the rhododendron's lifespan, which can span several decades with proper care and conditions.

  • sproutPropogation

    • Propogation time

      Spring-Early Summer

    • Rhododendron 'Tessa Roza', commonly known as Azalea, is often best propagated through a method called softwood cuttings. This is typically done in late spring to early summer, when new growth is still flexible but has begun to mature. To propagate by this method, a 4 to 6 inch long cutting with several leaves is taken from a healthy, disease-free mother plant using a sharp, clean tool to prevent infection. The lower leaves are removed, and the cut end is dipped in a rooting hormone powder to encourage root growth. The treated cutting is then inserted into a pot filled with a mixture of peat and perlite or sand to provide good drainage and aeration. The pot is covered with a plastic bag or placed in a propagator to maintain high humidity, and kept in a warm area with indirect sunlight until roots have developed, which can take several weeks. It's important to keep the soil moist, but not waterlogged, during this period to ensure successful rooting.