Iris pseudacorus 'Flore Pleno' is a variety of Iris pseudacorus, commonly known as Yellow Flag Iris. It is a stunning, double-flowered form of the species, featuring double layers of yellow petals. Here's a detailed description and care guide for Iris pseudacorus 'Flore Pleno':

Description:
Iris pseudacorus 'Flore Pleno' is similar in growth habit to the species Iris pseudacorus. It forms large clumps of upright, sword-shaped leaves that grow in a fan-like arrangement. The leaves are typically bright green and can add a vertical element to garden borders or wetland areas. From late spring to early summer, 'Flore Pleno' produces large, showy, double flowers with layers of yellow petals. The double flowers give the appearance of ruffled or fringed blooms, creating a striking and unique visual effect. The flowers are often fragrant and attract pollinators, such as bees and butterflies. After flowering, seed capsules may develop but are typically less prominent in double-flowered varieties. 'Flore Pleno' adds vibrant color and texture to garden ponds, water gardens, or wetland areas.

Care Guide:

Lighting: Iris pseudacorus 'Flore Pleno' thrives in full sun to partial shade. It prefers a location with at least 6 hours of direct sunlight per day. However, it can tolerate some shade, especially during the hottest parts of the day. Insufficient light may result in weaker growth and fewer flowers.

Water: Iris pseudacorus 'Flore Pleno' prefers consistently moist to wet soil conditions. It is naturally found in wetland habitats, such as marshes or along pond edges. Ensure the soil remains evenly moist throughout the growing season. Water deeply when the top inch of soil feels dry to the touch. In drier regions or during hot weather, providing supplemental irrigation can help maintain adequate moisture levels.

Soil: Iris pseudacorus 'Flore Pleno' prefers fertile, slightly acidic to neutral soil. It grows best in moist, well-draining soil that is rich in organic matter. If your soil is heavy or clay-based, you can improve drainage and fertility by adding compost or well-rotted manure. Avoid excessively sandy soil, as it may dry out too quickly.

Temperature: Iris pseudacorus 'Flore Pleno' is hardy in USDA hardiness zones 4-9. It can tolerate a range of temperatures but generally prefers moderate conditions. Protect the plant from extreme heat or prolonged periods of frost. In regions with hot summers, some afternoon shade can help prevent stress on the plant.

Fertilizer: Iris pseudacorus 'Flore Pleno' is generally tolerant of a variety of soil conditions and does not require heavy fertilization. However, incorporating a balanced, slow-release fertilizer into the soil in early spring can provide additional nutrients. Follow the manufacturer's instructions for dosage and application methods.

Maintenance: Iris pseudacorus 'Flore Pleno' is a low-maintenance plant. Regular maintenance involves removing any dead or yellowed leaves or spent flowers to maintain a tidy appearance. After blooming, you can remove the flower stalks near the base. Dividing the clumps every few years can help rejuvenate the plant and prevent overcrowding.

Propagation: Iris pseudacorus 'Flore Pleno' can be propagated through division. The best time to divide the clumps is in late summer or early autumn, after the plant has finished blooming. Carefully lift the clumps, separate them into smaller sections, ensuring each division has healthy roots and fan-like foliage, and replant them in suitable soil. Divisions should be planted at the same depth as they were previously growing.

Pests and Diseases: Iris pseudacorus 'Flore Pleno' is generally resistant to pests and diseases. However, it may occasionally attract iris borers or be susceptible to leaf spot diseases if growing conditions are unfavorable. Monitor the plant for any signs of pests or diseases and take appropriate measures if necessary.

By following these care guidelines, you can enjoy the stunning double flowers of Iris pseudacorus 'Flore Pleno' in your garden borders, water gardens, or wetland areas. Adjust the care routine based on your specific growing conditions and monitor the plant for any signs of stress, pests, or diseases. With proper care, Iris pseudacorus 'Flore Pleno' can provide a splash of color and bring a touch of natural beauty to your outdoor spaces.