Iris Pseudata Kimboshi - Marginal Pond Plants - MP050A

Iris pseudata ‘Kimboshi’, a hybrid between Iris pseudacorus and Iris ensata (Japanese Iris), is an exceptional aquatic perennial valued for its striking flowers and adaptability to wetland conditions. The pseudata group combines the robust nature of Iris pseudacorus with the exquisite flower forms and colouration of Iris ensata. ‘Kimboshi’ is particularly notable for its luminous golden-yellow blooms and graceful habit, making it an excellent choice for water gardens, pond edges, and boggy areas.

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Description

Iris pseudata ‘Kimboshi’ grows to a height of 80–100 cm (32–40 inches) with a spread of 50–60 cm (20–24 inches). The plant forms upright clumps of sword-like green foliage that remain attractive throughout the growing season, adding texture and vertical interest to the garden.

In late spring to early summer (May to June), tall flower stems rise above the foliage, bearing large, elegant blooms in a vibrant golden-yellow hue. The flowers are lightly veined with deeper yellow or orange tones, creating a stunning display. The graceful petals and distinctive colouring make ‘Kimboshi’ a standout feature in any moist or aquatic garden.

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Growing Conditions

Iris pseudata ‘Kimboshi’ thrives in full sun to partial shade and prefers consistently moist or waterlogged soil. It is well-suited for planting in shallow water up to 10–15 cm (4–6 inches) deep, making it ideal for pond margins, streams, or bog gardens. The plant grows well in nutrient-rich loam or clay soils and tolerates slightly acidic to neutral pH levels.

Hardy in the UK, this iris can withstand frost and regrows vigorously each spring after winter dormancy. Its adaptability makes it a reliable choice for a variety of water garden settings.

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Propagation and Care

Iris pseudata ‘Kimboshi’ is propagated by division, which is best performed in early spring or late summer after flowering. To propagate, lift the rhizomes carefully, divide them into sections with roots and shoots, and replant them in suitable moist conditions.

Once established, the plant is low-maintenance. Regular watering is essential, especially during dry periods, to maintain its preferred damp environment. Deadheading spent flowers keeps the plant looking tidy and encourages energy conservation for next season’s growth. Cutting back foliage in late autumn prepares the plant for winter dormancy and encourages fresh growth in spring.

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Uses

Ornamental:

Iris pseudata ‘Kimboshi’ is a striking focal point for water gardens, pond edges, and damp borders. Its golden-yellow flowers and upright foliage bring bold colour and texture, making it an excellent companion for other moisture-loving plants, such as Caltha palustris (Marsh Marigold), Pontederia cordata (Pickerel Weed), and Iris laevigata.

Naturalized Planting:

This hybrid is well-suited for naturalizing in wetland areas, where its robust growth and stunning blooms enhance the landscape while supporting biodiversity.

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Ecological Value

Iris pseudata ‘Kimboshi’ supports local wildlife by providing nectar and pollen for pollinators such as bees and butterflies. Its foliage and root systems help stabilize soil along water margins, reducing erosion and improving the health of aquatic ecosystems.

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Considerations

• Moisture Needs: The plant requires consistently moist or waterlogged conditions and is not suited for dry or well-drained areas.
• Winter Dormancy: Kimboshi dies back in winter but regrows vigorously in spring.
• Spread Management: While not invasive, it may spread through rhizomes in favourable conditions. Regular division helps control its size and maintain its vigour.

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Summary

With its striking golden-yellow blooms, robust nature, and ability to thrive in wet conditions, Iris pseudata ‘Kimboshi’ is a standout choice for water gardens, pond margins, and damp borders. Its ornamental beauty, ecological benefits, and adaptability make it an ideal plant for enhancing the aesthetic and biodiversity of aquatic landscapes. Easy to grow and maintain, this hybrid brings a touch of elegance and bold colour to any garden setting.

Why Choose Iris pseudata 'Kimboshi'?

Iris pseudata 'Kimboshi', a stunning hybrid of the Japanese Iris and Yellow Flag Iris, is perfect for adding both beauty and structure to pond edges, bog gardens, and wetland landscapes. Known for its large, showy flowers and elegant appearance, this cultivar features bold purple petals with a distinctive white and yellow center, creating a striking contrast in any aquatic garden. Its hardy nature and ability to thrive in wet conditions make it an excellent choice for a low-maintenance, dramatic addition to your landscape.

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1. Striking Purple Flowers with White and Yellow Accents

• Iris pseudata 'Kimboshi' produces large, deep purple flowers with white and yellow accents at the center, creating a striking focal point in any garden.
• The bold color and contrasting centers of the flowers make it an eye-catching addition to wetland or water gardens.
• The flowers bloom in late spring to early summer, attracting pollinators like bees and butterflies, adding beauty and functionality to your aquatic space.

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2. Graceful, Upright Foliage

• Features long, narrow, grass-like leaves that grow in an upright and dense clump.
• The foliage provides a natural, elegant structure to the garden, complementing the bold flowers and adding texture to wetland or water gardens.
• The leaves remain vibrant throughout the growing season, offering a backdrop to the blooms and contributing to a neat, tidy look.

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3. Thrives in Wet and Moist Conditions

• Iris pseudata 'Kimboshi' is ideal for moist soil or shallow water (up to 30 cm / 12 inches deep), making it perfect for planting along pond edges, in bog gardens, or wet meadows.
• It thrives in full sun to partial shade, offering flexibility for various garden conditions while ensuring healthy growth and vibrant blooms.

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4. Hardy and Low Maintenance

• Iris pseudata 'Kimboshi' is a hardy perennial that can tolerate fluctuating water levels and varying moisture conditions, making it well-suited for diverse wetland environments.
• Once established, it requires minimal care, offering reliable, striking blooms year after year with little maintenance.

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5. Wildlife-Friendly

• The vibrant purple flowers attract pollinators, such as bees, butterflies, and moths, promoting a healthy garden ecosystem.
• The plant’s dense foliage also provides shelter for small creatures like amphibians, insects, and small birds, helping to support a thriving ecosystem in your pond or wetland garden.

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6. Erosion Control and Water Filtration

• The plant’s dense root system helps stabilize soil, making it ideal for erosion control along pond banks and wetland areas.
• Iris pseudata 'Kimboshi' also helps to filter water, improving water quality by absorbing excess nutrients and contributing to a healthier aquatic environment.

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7. Versatile Design Use

• Ideal for water gardens, bog gardens, pond edges, or wetland landscapes, where it can provide both color and texture.
• Works well in naturalistic plantings, where its bold flowers complement other moisture-loving plants, or as part of a wildlife-friendly garden to support pollinators and small creatures.

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Key Features

• Height: 60–90 cm (24–36 inches)
• Flowers: Deep purple blooms with white and yellow accents, appearing in late spring to early summer
• Soil: Moist to wet soil or shallow water
• Light: Full sun to partial shade

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Iris pseudata 'Kimboshi' is a beautiful, low-maintenance addition to any wetland or water garden. Its vibrant flowers, graceful foliage, and wildlife benefits make it an excellent choice for creating a dramatic, colorful, and diverse aquatic space.