Rose of Sharon Hibiscus syriacus Ultramarine = 'Minultra' (PBR)
![rose of Sharon [Ultramarine]](/_next/image?url=https%3A%2F%2Fplants-admin.emdemapps.com%2Fimages%2Fplants%2F%2Fimages%2F604b552dcd7b2.png&w=3840&q=75)
ABOUT
The Hibiscus syriacus Ultramarine, commonly known as Rose of Sharon, is an eye-catching deciduous shrub that adds a tropical flair to any landscape. This particular variety, known as 'Minultra', is celebrated for its stunning flowers. Typically, the blooms are an intense shade of violet or deep blue, giving the 'Ultramarine' name its due representation. These flowers are large and showy, with a trumpet-like form that opens up to reveal a prominent, contrasting stamen that tends to be a lighter shade, often drawing the eye with its stark color difference. This Rose of Sharon's flowers are not the only appealing feature; its foliage also contributes to its overall beauty. The leaves are toothed and have a somewhat heart-shaped appearance, providing a lush green backdrop that makes the vibrant flowers stand out even more. When the plant is not in bloom, its foliage alone maintains the shrub’s visual interest. The branching of the Hibiscus syriacus 'Minultra' is somewhat upright, creating a vase-like structure that supports the profusion of blooms it produces. The overall impression of this plant is one of robustness and vibrant color, with a profusion of summer blooms that can last into the fall, making it a beloved choice for gardeners looking to add a long-lasting pop of color to their outdoor spaces.
About this plant
NamesFamily
Malvaceae
Synonyms
Rose of Sharon, Shrub Althea
Common names
Hibiscus syriacus 'Minultra', Hibiscus syriacus Ultramarine.
ToxicityTo humans
The Rose of Sharon is generally considered non-toxic to humans. However, as with any plant, individual sensitivity or allergic reactions may occur. If symptoms do arise from someone ingesting part of the Rose of Sharon, they are typically mild and often do not require medical treatment.
To pets
The Rose of Sharon is generally regarded as non-toxic to pets such as dogs and cats. Nonetheless, it can sometimes cause mild gastrointestinal upset if ingested, such as vomiting or diarrhea. As each pet may react differently, monitoring your pet and consulting a veterinarian if symptoms occur is best.
CharacteristicsLife cycle
Perennials
Foliage type
Deciduous
Color of leaves
Green
Flower color
Blue
Height
8 feet (2.44 meters)
Spread
6 feet (1.83 meters)
Plant type
Shrub
Hardiness zones
5
Native area
China Korea
Benefits
General Benefits- Aesthetic Appeal: The hibiscus has showy, large ultramarine blue flowers that provide a tropical look and add a splash of color to gardens.
- Drought Tolerance: Once established, it is fairly drought-tolerant, making it suitable for gardens in drier climates.
- Low Maintenance: Hibiscus 'Minultra' requires minimal care and is relatively free of pests and diseases.
- Attracts Pollinators: The plant attracts bees and butterflies, which help pollinate other plants in the garden.
- Adaptable: It can adapt to a variety of soil conditions, though it prefers well-drained soils.
- Compact Growth: This particular cultivar is compact and can fit into smaller garden spaces or can be used in container gardening.
- Seasonal Interest: It blooms in late summer to early fall, providing interest at a time when many other plants have finished flowering.
- Hardy: It's hardy in many climates and can withstand cold winters in temperate regions.
- Versatility: It can be used in a wide range of garden settings, including borders, hedges, or as a stand-alone specimen.
- Improves Garden Diversity: Adding a variety of plant species, like the hibiscus, can create a more diverse and resilient garden ecosystem.
Medical Properties- This plant is not used for medical purposes.
Air-purifying QualitiesThis plant is not specifically known for air purifying qualities.
Other Uses- Hibiscus syriacus 'Ultramarine' can be used as a natural dye for fabric and paper, giving a delicate pink to mauve color depending on the mordant used.
- This plant's wood is fine-grained and can be used for delicate woodworking projects, such as inlays and small carvings.
- The flowers can be pressed and used in craft projects such as making homemade paper or in resin jewelry.
- The shrub can serve as a natural privacy screen or hedge when planted in a row, due to its dense foliage.
- Dried hibiscus flowers from this variety can be used in potpourri mixtures, adding a floral scent and a touch of color.
- The blossoms can be used to create floral arrangements or wreaths, either fresh or dried, for decoration.
- Leaves from the Hibiscus syriacus 'Ultramarine' can be used to shape and mold chocolates or sugar paste decorations for cakes by pressing the material onto the leaf vein pattern.
- The plant can be incorporated into a sensory garden, as it has a variety of textures from its leaves to flowers, which can be appreciated by both children and adults.
- Its strong stems can be used in rustic craft projects, such as making homemade trellises or supporting structures for other plants.
- Hibiscus syriacus 'Ultramarine' petals can be used to make a natural, subtle blush makeup by drying the petals and crushing them into a fine powder.
Interesting Facts
Feng ShuiThe Rose of Sharon is not used in Feng Shui practice.
Zodiac Sign CompitabilityThe Rose of Sharon is not used in astrology practice.
Plant Symbolism- Delicate Beauty: The hibiscus flower, with its vivid colors and graceful form, often represents delicate beauty in various cultures.
- Femininity: The flower's association with beauty also makes it a symbol of femininity and the celebration of womanhood.
- Immortality: In South Korea, where Hibiscus syriacus is the national flower (also known as Mugunghwa), it epitomizes immortality and everlasting life due to its ability to withstand harsh winters and bloom again in spring.
- Hospitality: In many cultures, the hibiscus is a symbol of hospitality, inviting and welcoming guests.
- Carpe Diem (Seize the Day): Since hibiscus flowers tend to bloom for a short period, they often symbolize seizing the moment and making the most of the present time.
- Good Fortune and Happiness: In several Asian countries, the hibiscus is seen as a bringer of good fortune and a happy life, sometimes given as a gift in celebrations.
- Love and Passion: The intense colors of the hibiscus are frequently associated with love and passion, and giving someone this flower can be seen as an expression of romantic interest.
WaterThe Rose of Sharon requires consistent moisture and should be watered thoroughly when the top inch of soil feels dry to the touch. During the growing season, this might mean watering approximately every 7 to 10 days, depending on weather conditions. Always aim to water at the base of the plant, avoiding wetting the foliage, to prevent fungal diseases. In terms of quantity, for an established shrub, provide about 1 to 1.5 gallons of water each time you water, ensuring it reaches the plant's root zone. During hot, dry spells, the frequency of watering should increase, but always check the soil moisture level before watering.
LightRose of Sharon thrives best in full sun conditions where it can receive at least six to eight hours of direct sunlight daily. It can tolerate partial shade, but flowering is most prolific in full sun. The best spot for the plant is an unobstructed area where it can enjoy the morning sun, which dries dew promptly and reduces the risk of fungus.
TemperatureRose of Sharon is hardy and can tolerate a range of temperatures, but it performs best in temperatures between 60°F and 90°F. It can survive minimum winter temperatures down to about -10°F. To encourage abundant blooming, it's ideal to place the plant in a location where the summer temperatures are usually warm.
PruningPrune Rose of Sharon to maintain its shape, promote vigorous growth, and enhance flowering. The best time to prune is in late winter or early spring before new growth begins. Annually remove any dead, diseased, or crossing branches, and shape the plant as desired. Periodic thinning of the branches can help increase air circulation and light penetration, which benefits the plant's overall health.
CleaningAs needed
SoilRose of Sharon prefers well-draining, loamy soil with a pH of 5.5 to 7.5. A mix of two parts loam to one part peat moss and one part perlite or sand would promote healthy growth.
RepottingRose of Sharon, being a shrub, is typically planted outdoors and does not require frequent repotting. If potted, repot every 2-3 years to refresh the soil.
Humidity & MistingRose of Sharon tolerates a wide range of humidity levels but thrives best in average to high humidity conditions typical of outdoor environments.
Suitable locationsIndoor
Ensure bright light, prune for shape, and keep soil moist.
Outdoor
Plant in sun, water regularly, and protect from strong winds.
Hardiness zone
5-9 USDA
Life cycleThe life of the Rose of Sharon 'Minultra' begins with seed germination, which occurs when environmental conditions are suitable, including proper temperature and moisture. Following germination, the seedling emerges and grows into a young plant, developing a root system and foliage through the vegetative stage focused on growth and nutrient accumulation. Once mature—usually after a few years—'Minultra' enters the flowering stage, blooming in the summer with large, trumpet-shaped flowers that attract pollinators. After pollination, the plant forms seed capsules that dry and release seeds, enabling propagation. Throughout its life, the Rose of Sharon 'Minultra' undergoes cycles of growth, flowering, and dormancy, with the plant losing leaves and entering a state of rest during the colder months. This deciduous shrub can live for many years, continuing its life cycle annually with proper care and environmental conditions.
PropogationPropogation time
Spring-Early Summer
Hibiscus syriacus Ultramarine, commonly known as Rose of Sharon, is most popularly propagated through softwood cuttings. This method often takes place in late spring to early summer, when new growth is still tender but mature enough to root successfully. A cutting of about 4 to 6 inches (approximately 10-15 cm), with several leaves, is snipped from the plant. The lower leaves are removed, and the cut end is dipped in rooting hormone to encourage root growth. The cutting is then placed in a pot filled with a mixture of peat and perlite or sandy soil, ensuring that one or two leaf nodes are buried beneath the soil surface. The potted cutting should be kept in a warm, bright location but out of direct sunlight, and the soil should remain moist but not saturated. Roots typically develop within a few weeks, after which the plant can eventually be transferred outdoors.
