Dwarf Iris Iris 'Blue Hill' (Reticulata)

☠ Toxic to humans
🐾 Toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Easy-care
iris 'Blue Hill'


The Iris 'Blue Hill', known for its striking beauty, showcases a delightful display of intense blue flowers. Each bloom is characterized by its classic iris shape, featuring three upright petals, called "standards," and three downward-curling petals known as "falls." The standards are typically a lighter shade of blue, creating a delicate contrast against the richer-hued falls. The falls are adorned with a yellow or white pattern at their base, which acts as a guide for pollinating insects. The blooms are borne on slender, sturdy stems that rise gracefully from a clump of sword-like, green leaves with a slight arch. The leaves have a linear shape, providing a vertical visual interest and lush greenery for the striking blue flowers to stand out against. The plant exudes a light, sweet fragrance, adding another layer of sensory delight. The flowers of the Iris 'Blue Hill' have a texture that is both velvety and satiny to the touch, enhancing their visual allure. Overall, this plant presents a harmonious blend of color, form, and fragrance that can capture the attention of any onlooker in a garden setting.

Plant Info
Common Problems

About this plant

  • memoNames

    • Family


    • Synonyms

      Blue Hill Iris, Dwarf Iris, Netted Iris, Early Bulbous Iris

    • Common names

      Iris 'Blue Hill'.

  • skullToxicity

    • To humans

      Iris 'Blue Hill', commonly known as Dwarf Iris, contains compounds that can be toxic if ingested. The plant, particularly its rhizomes (underground stems), contains irritants that can cause stomach pain, nausea, vomiting, and diarrhea if consumed. Handling the plant, especially the rhizomes, may also cause skin irritation in sensitive individuals.

    • To pets

      Dwarf Iris presents toxicity risks for pets if ingested. The rhizomes contain irritants that can lead to symptoms such as gastrointestinal upset, including drooling, vomiting, and diarrhea. In severe cases, ingestion could result in lethargy or abdominal pain. It is important for pet owners to prevent their animals from consuming any part of the plant.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      4-6 inches (10-15 cm)

    • Spread

      3 inches (7.5 cm)

    • Plant type


    • Hardiness zones


    • Native area

      Middle East


  • money-bagGeneral Benefits

    • Early Spring Bloom: Provides a pop of color with beautiful blue flowers early in the spring when few other plants are blooming.
    • Compact Size: Ideal for small spaces, rock gardens, and borders due to its small stature.
    • Draught Tolerance: Once established, it requires minimal watering, making it suitable for drier conditions.
    • Low Maintenance: Requires minimal care once planted, making it a good choice for busy gardeners or those new to gardening.
    • Attracts Pollinators: Helps support local bee populations by providing an early source of nectar.
    • Cold Hardy: Can withstand cold temperatures and is suitable for planting in a range of climate zones.
    • Versatile Planting Options: Suitable for planting in containers, garden beds, and naturalizing in grassy areas.
    • Showy Flowers: Its striking blue flowers add visual interest to the garden.
    • Multiplication Over Time: Can produce offsets that lead to more plants, gradually expanding its presence in the garden without additional planting.

  • 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 petals of Iris 'Blue Hill' can be used to create a natural dye for fabrics, providing a unique and gentle color derived from the plant's pigment.
    • Iris fibers from the leaves can be used in paper making, adding texture and a distinct look to handcrafted paper products.
    • The plant can serve as an educational tool in botany and horticulture courses, teaching students about bulb propagation and growth habits.
    • Stems of the Iris can be utilized in art installations, providing a structural element in dried floral arrangements and displays.
    • The plant's distinctive appearance can inspire artists and designers, influencing patterns and motifs in textile and graphic design.
    • Aromatic oils can be extracted from the Iris 'Blue Hill' flowers for use in perfumery and scent crafting, though it is not a common practice.
    • The seed pods can be incorporated into jewelry making, offering an organic and unique element to necklaces and earrings.
    • The blooming Iris garden can be a setting for photography and painting, capturing the beauty of the plant in various forms of visual art.
    • Iris 'Blue Hill' can act as a biological indicator for seasonal change, as they bloom at particular times of the year.
    • Used in ceremonial planting, Iris 'Blue Hill' can add symbolism in rites of passage or remembrance events, as irises often symbolize hope and wisdom.

Interesting Facts

  • bedFeng Shui

    The Iris is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    The Iris is not used in astrology practice.

  • spiralPlant Symbolism

    • Faith: The iris often symbolizes faith, reflecting a trust in the unknown and the divine.
    • Wisdom: This flower is associated with wisdom, representing knowledge and valued insight.
    • Hope: Irises convey a sense of hope, indicating positive expectations and aspirations for the future.
    • Courage: The iris can be a symbol of courage, signifying the bravery required to face challenges in life.
    • Royalty: Due to its regal appearance, the iris is often connected to royalty and noble characteristics.
    • Purity: The striking yet delicate bloom can indicate purity, often being present in sacred or cherished spaces.

Every 1-2 weeks
2500 - 10000 Lux
Every 3-4 years
Early Autumn
Not needed
  • water dropWater

    The Dwarf Iris should be watered deeply once a week, ensuring the soil is moist but not waterlogged, especially during the growth and blooming phase. Since they are relatively drought-tolerant, reduce watering after blooming ends to encourage dormancy. A general rule of thumb is to provide an inch of water, which translates to about 0.6 gallons per square yard, weekly. Adjust the watering frequency based on rainfall and soil type, as sandy soils drain faster than clay.

  • sunLight

    Dwarf Irises thrive in full sun to part shade, requiring at least 6 hours of direct sunlight daily. The ideal spot would be an area receiving morning sun and afternoon shade or dappled sunlight throughout the day, which helps protect the flowers from the intense afternoon heat.

  • thermometerTemperature

    Dwarf Irises prefer cooler climates and can tolerate temperatures as low as 5°F but are best grown in regions where winter temperatures remain above -10°F. The ideal growing temperature range for these Irises is between 35°F and 70°F. They may struggle in regions where temperatures frequently exceed 90°F during the growing season.

  • scissorsPruning

    Prune Dwarf Irises primarily to remove spent flower stalks and any damaged or yellowing leaves, which encourages new growth and maintains plant vigor. Pruning is best done immediately after blooming and should be done annually. Use clean, sharp shears to make precise cuts, avoiding damage to the healthy portions of the plant.

  • broomCleaning

    As needed

  • bambooSoil

    Dwarf Iris 'Blue Hill' thrives in well-draining, loamy or sandy soil enriched with organic matter. The ideal soil pH for Dwarf Iris should be slightly acidic to neutral, ranging from 6.0 to 7.0.

  • plantRepotting

    Dwarf Iris 'Blue Hill' typically doesn't require frequent repotting. It's sufficient to divide and repot these irises every 3 to 4 years to prevent overcrowding and rejuvenate their growth.

  • water dropsHumidity & Misting

    Dwarf Iris 'Blue Hill' is tolerant of a range of humidity levels and does not have specific humidity requirements, making it suitable for typical outdoor conditions.

  • pinSuitable locations

    • Indoor

      Place Dwarf Iris in a sunny spot with well-draining soil.

    • Outdoor

      Plant in well-drained soil; full sun or part shade.

    • Hardiness zone

      4-9 USDA

  • circleLife cycle

    The life cycle of Iris 'Blue Hill', commonly known as the Dwarf Iris, begins with seed germination, which is typically prompted by a period of cold stratification that simulates winter conditions. Once the seeds sprout in early spring, the seedlings establish a small bulb-like structure called a corm, from which roots and foliage emerge. The plant grows leaves that photosynthesize to provide energy for its growth and development. After establishing its foliage, the Dwarf Iris then sends up a stalk that bears its characteristic blue or purple flowers, usually in late winter to early spring depending on the climate. Following pollination by insects, the flowers produce seed capsules that eventually dry and release seeds, thus completing the reproductive cycle. After flowering, the plant enters a period of dormancy during the hotter summer months, where the corm survives underground before regenerating the next growing season.

  • sproutPropogation

    • Propogation time

      Early Autumn

    • The Iris 'Blue Hill' (Reticulata), commonly referred to as the Dwarf Iris, is typically propagated by dividing its bulbs, with the ideal time for this activity being late summer after the foliage has died back. To propagate the Dwarf Iris using this method, carefully dig up the clumps of bulbs and gently separate them, making sure that each section has one or more bulbs. These individual bulbs can then be replanted at a depth of about 3 to 4 inches (approximately 7.6 to 10.2 centimeters) and spaced about 3 inches (roughly 7.6 centimeters) apart in well-draining soil with good exposure to sunlight. The new bulbs will then establish themselves and grow into separate plants, which will bloom the following season. It is a straightforward and effective technique that maintains the genetic characteristics of the parent plant.