Siberian Iris Iris 'Regency Belle' (Sib)

☠ Toxic to humans
🐾 Toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Easy-care
Siberian iris 'Regency Belle'


Iris 'Regency Belle' is a stunning perennial that showcases a breathtaking display with its striking blossoms. The plant is characterized by its sword-like foliage, which provides a lush, green backdrop for its standout flowers. The foliage emerges from robust rhizomes that spread out just beneath the soil. The flowers of the 'Regency Belle' are particularly captivating, with their elegant form typical of irises. Each bloom is composed of a set of beautifully arched standards, which are the upright petals, paired with gracefully drooping falls, the lower petals that often showcase a contrasting pattern or bearding. The petals exhibit a sumptuous combination of colors, usually featuring soft pastel shades that can range from delicate lavender to a pale pink, often with a pleasantly ruffled texture that adds to their romantic appeal. At the center of each flower, a striking set of beards—small, fuzzy appendages—may be found, which are often a different hue that adds an arresting touch to the bloom. This orchestrated display of petals and beards makes the 'Regency Belle' a favorite among garden enthusiasts for its ornamental qualities. The flowers are carried high above the foliage on sturdy, upright stems, creating an impressive visual impact. This Iris blooms typically during the spring to early summer season, bringing a refreshing burst of color to gardens after the winter months. Once in bloom, these plants can become a focal point in a garden setting, attracting admirers with their sophisticated beauty and inviting appearance.

Plant Info
Common Problems

About this plant

  • memoNames

    • Family


    • Synonyms

      Siberian Iris

    • Common names

      Iris 'Regency Belle' (Sib).

  • skullToxicity

    • To humans

      The Siberian iris, including the Iris 'Regency Belle', contains compounds that may cause mild stomach upset if ingested. Although it is not considered highly toxic, eating parts of the plant can lead to symptoms such as nausea, vomiting, or diarrhea. The rhizomes are the most likely to cause these effects, so it is advisable to handle the plant with care and ensure that children do not ingest any part of it.

    • To pets

      The Siberian iris, including the Iris 'Regency Belle', may cause mild gastrointestinal irritation to pets if ingested. While it is generally not considered severely toxic, consumption can result in signs such as vomiting, drooling, or diarrhea in animals like dogs and cats. Caution should be taken to prevent pets from eating parts of the plant, especially the rhizomes, which contain the highest concentration of irritating substances.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      2-3 feet (60-90 cm)

    • Spread

      1-2 feet (30-60 cm)

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Ornamental Value: Adds aesthetic appeal to gardens with its attractive blooms.
    • Low Maintenance: Requires minimal care once established, making it ideal for busy gardeners.
    • Drought Tolerance: Survives with less water, which is beneficial in areas with water restrictions.
    • Pollinator Friendly: Attracts bees, butterflies, and other beneficial insects, supporting biodiversity.
    • Seasonal Interest: Offers vibrant flowers in spring and summer, adding seasonal color to landscapes.
    • Cold Hardy: Tolerant of cold temperatures, suitable for growth in many climate zones.
    • Erosion Control: The root system can help stabilize soil and prevent erosion.
    • Adaptability: Can thrive in a variety of soil types, from clay to sandy soils.
    • Deer Resistant: Less likely to be eaten by deer, reducing the need for protective measures.
    • Culinary Use: Some species’ flowers can be used as garnishes or in salads (note: verify edibility of the specific Iris variety before consumption).

  • 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

    • Iris 'Regency Belle' can be used as a natural dye, with its petals providing a range of colors from yellow to purple, depending on the mordant used.
    • The fibers from the leaves of the Siberian Iris can be used to make paper, providing a textured and decorative quality to handmade crafts.
    • The plant can serve as a teaching tool in botanical and horticulture programs for students to learn about plant biology and hybridization techniques.
    • Iris 'Regency Belle' offers a striking option for edible flower arrangements, although consumption should be in moderation and with knowledge of any potential allergies.
    • The Siberian Iris rhizomes can be used in perfume manufacturing, where they are sometimes included as fixatives or to add a faintly sweet and earthy aroma.
    • These irises can be utilized in art projects, including pressing the flowers for inclusion in stationery or decorative botanical prints.
    • Iridology, a pseudoscience involving the study of patterns in the iris of the eye, has appropriated the name although it's unrelated to the plant itself.
    • Aphid control in gardens might be facilitated by the Siberian Iris, as these plants can attract ladybugs, which are natural predators to aphids.
    • The plant can act as a biological indicator for garden health, with its vigor and bloom indicating soil and microclimate conditions.
    • Their tall and structured form makes Siberian Irises suitable for practicing ikebana, the Japanese art of flower arrangement, focusing on shape, line, and form.

Interesting Facts

  • bedFeng Shui

    The Siberian iris is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    The Siberian iris is not used in astrology practice.

  • spiralPlant Symbolism

    • Royalty: The 'Regency Belle' Sibirian Iris, with its regal appearance, often symbolizes royalty and nobility, reflecting the high esteem in which the flower is held.
    • Wisdom: Irises are frequently associated with wisdom, a symbolism rooted in Greek mythology where the goddess Iris was a messenger who represented communication and messages from the gods.
    • Faith: As a symbolic flower in many cultures, the iris represents faith and hope, embodying a sense of trust in the future and spiritual guidance.
    • Valor: The tall and upright stature of the Siberian Iris suggests valor and bravery, often used to convey respect for courageous actions.
    • Purity: The delicate petals and clean lines of the 'Regency Belle' can also stand for purity and innocence, echoing the flower's pristine aesthetic.

Every 2 weeks
2500 - 10000 Lux
Every 3-4 years
Late Summer to Early Fall
As needed
  • water dropWater

    For Siberian Iris 'Regency Belle', water thoroughly to encourage deep root development. They prefer consistently moist soil, especially during the growing season. It's ideal to water them with approximately 1 gallon per square foot per week, adjusting for rainfall. During periods of high heat or drought, they may require additional watering. Overhead watering in the morning hours is effective, allowing foliage to dry out during the day to prevent disease.

  • sunLight

    Siberian Iris 'Regency Belle' thrives in full sun to partial shade conditions. A location that provides at least six hours of sunlight is ideal for the best bloom performance. However, they can tolerate some light afternoon shade, especially in hotter regions.

  • thermometerTemperature

    Siberian Iris 'Regency Belle' grows best in areas with a temperature range between 30°F and 80°F. They can survive winter temperatures as low as -20°F, but for optimal growth, maintaining temperatures above freezing is preferred. Providing some winter mulch can help protect them in colder climates.

  • scissorsPruning

    Pruning Siberian Iris 'Regency Belle' involves removing spent flowers and cutting back foliage after it has yellowed in the fall. This helps redirect energy to root development and keeps the garden tidy. The best time for pruning is immediately after blooms have faded and when foliage begins to die back.

  • broomCleaning

    As needed

  • bambooSoil

    Siberian iris like 'Regency Belle' thrive best in a peat-rich, medium-moisture, well-draining soil mix with a pH of slightly acidic to neutral (pH 6.5-7.0). A mix of garden soil, peat moss, and perlite or coarse sand is suitable to provide the proper growing conditions.

  • plantRepotting

    Siberian irises like 'Regency Belle' generally do not need to be repotted often as they prefer not to be disturbed. They should be divided and repotted every 3 to 5 years, or when the clump becomes too crowded and flowering diminishes.

  • water dropsHumidity & Misting

    Siberian irises, including 'Regency Belle', tolerate a wide range of humidity levels but perform best when the humidity is moderate to high. They do not have specific humidity requirements and can adapt to the local ambient conditions.

  • pinSuitable locations

    • Indoor

      Ensure bright light, cool temps, and moist soil for indoor Siberian irises.

    • Outdoor

      Plant in sun-part shade, keep soil moist but not soggy for outdoor growth.

    • Hardiness zone

      3-9 USDA

  • circleLife cycle

    The Siberian iris 'Regency Belle' begins its life cycle with seed germination, typically in late winter to spring, where the plant emerges from dormancy with new growth. As temperatures increase, foliage growth is vigorous, producing long, narrow leaves and establishing a strong root system. During late spring to early summer, it enters the flowering stage, producing delicate blooms that range in color, often showcasing beautiful shades of purple, blue, or white with contrasting markings. After flowering, the plant sets seed in pods that mature by late summer or fall, which can be collected for propagation or naturally dispersed by wind or animals. Through the fall, the Siberian iris begins to enter dormancy, where above-ground foliage may die back, depending on the climate. Finally, it overwinters with the roots and rhizomes remaining dormant underground until the next growth cycle begins.

  • sproutPropogation

    • Propogation time

      Late Summer to Early Fall

    • The most popular method of propagating Iris 'Regency Belle', also known as Siberian iris, is through division. This is typically done in the late summer after the blooming period has finished, or in early fall. To propagate by division, carefully dig up the clumps of Iris plants, taking care not to damage their rhizomes, which are the thick, root-like structures. Gently separate the rhizomes by hand, ensuring that each division has at least one healthy fan of leaves and a portion of the roots attached. Replant the divisions promptly, setting them so that the tops of the rhizomes are about an inch (2.54 cm) below the soil surface, spacing them about 18 to 24 inches (45 to 60 cm) apart to allow for adequate growth and air circulation. Water the new divisions thoroughly to help establish them. This method allows the gardener to rejuvenate older clumps that may have become overcrowded and to produce new plants that will flower in subsequent seasons.