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Iris Louisiana Her Highness Aquatic Pond Plant - Louisiana Iris

Aquatic Plants
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Delivery Time: Delivered within 2-4 working days. 6.99 for Unlimited Plants

Iris louisiana 'Her Highness' is a cultivar of Iris louisiana, commonly known as Louisiana Iris. It is a stunning herbaceous perennial that produces large, elegant flowers in shades of pink and lavender. Here's a detailed description and care guide for Iris louisiana 'Her Highness':

Iris louisiana 'Her Highness' features large, ruffled flowers with velvety petals in shades of pink and lavender. The blooms have a unique form with falls that curve downward and standards that stand upright, creating a striking contrast. The flowers typically have a yellow or white signal pattern at the base of each petal. They can reach a diameter of 10-15 cm (4-6 inches) and rise on tall, sturdy stems that can reach a height of 60-90 cm (24-36 inches). The foliage is long, slender, and bright green in color. It forms clumps of arching leaves that provide an attractive backdrop to the flowers.

Care Guide:

Light: Iris louisiana 'Her Highness' thrives in full sun to partial shade. It prefers at least 6 hours of direct sunlight per day to promote optimal flowering. However, it can tolerate some shade, especially in regions with hot summers, where it benefits from protection against intense afternoon sun.

Water: Louisiana Iris prefers consistently moist soil. Ensure the soil is evenly moist but not waterlogged. These plants can tolerate some periods of wet soil, but they should not sit in standing water for extended periods. Regular watering is important, especially during dry spells or in sandy soil. Mulching around the plants can help retain soil moisture.

Soil: Louisiana Iris prefers rich, slightly acidic soil that is moist and well-draining. They can tolerate a range of soil types, including clay, loam, or sandy soil. Amending the soil with organic matter, such as compost or well-rotted manure, before planting can improve its fertility and moisture retention.

Temperature: Iris louisiana 'Her Highness' is hardy in USDA hardiness zones 4-9. It is well-suited to moist, boggy areas and can tolerate both heat and humidity. In regions with extremely cold winters, providing a layer of mulch around the plants can help protect them from frost.

Fertilizer: Louisiana Iris plants benefit from regular fertilization. Apply a balanced slow-release fertilizer in early spring or incorporate a granular fertilizer into the soil before planting. Follow the package instructions for application rates. In subsequent years, you can apply a balanced liquid fertilizer during the growing season to promote healthy growth and abundant flowering.

Pruning: Minimal pruning is required for Louisiana Iris. After the flowering period, you can remove any spent flower stalks to maintain a neat appearance. In late fall or early spring, you can trim back the leaves to a few inches above the ground to allow for new growth.

Pests and Diseases: Louisiana Iris is generally resistant to pests and diseases. However, they may occasionally be affected by iris borer or slugs. Monitor your plants regularly and take appropriate measures to control any infestations. Good air circulation and proper spacing between plants can help prevent fungal diseases.

Iris louisiana 'Her Highness' is a regal and elegant perennial that adds beauty and color to garden beds, borders, or water gardens. By providing the right growing conditions and proper care, you can enjoy the exquisite flowers and attractive foliage of this cultivar in your landscape.

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Here are some general tips and care guidelines for marginal pond plants:


Research different species of marginal pond plants to find ones that suit your pond's conditions and your aesthetic preferences. Consider factors such as height, flower colour, foliage texture, and seasonal interest when selecting plants.


Observe the natural conditions of your pond, such as sun exposure, soil type, and water movement, and choose plants that are adapted to those conditions. Create different planting zones around the pond, with plants that prefer wet soil closer to the water's edge and those that tolerate drier soil further away.


Marginal plants typically thrive in full sun to partial shade. Some species can tolerate more shade, but for optimal growth and flowering, provide them with at least 6 hours of direct sunlight per day.

Water Depth:

Determine the water depth requirements of the marginal plants you choose. Some plants prefer water up to 6 inches deep, while others can tolerate water up to 12 inches or more. Ensure that the water level remains consistent within the preferred range for the chosen plants.


Marginal plants prefer a rich, loamy soil that retains moisture but is not waterlogged. Amend the soil with organic matter, such as compost or well-rotted manure, to improve its fertility and drainage. Avoid using heavy clay soil, as it can become compacted and restrict root growth.


Dig a hole slightly larger than the root ball of the plant and loosen the soil at the bottom. Place the plant in the hole, ensuring that the crown is level with or slightly above the soil surface. Backfill the hole with soil and gently firm it around the plant to eliminate air pockets. Water thoroughly after planting to settle the soil and provide initial hydration.


Apply a layer of organic mulch around the base of the plants to suppress weeds, conserve moisture, and regulate soil temperature.Use materials like straw, shredded bark, or compost, and maintain a depth of 2-3 inches.


Marginal plants prefer consistently moist soil but should not be waterlogged. Monitor the moisture level regularly and water as needed to keep the soil evenly moist. During hot and dry periods, provide supplemental watering to prevent the soil from drying out.


Marginal plants generally do not require heavy fertilization if the soil is nutrient-rich. However, if growth appears weak or leaves show signs of nutrient deficiencies, apply a balanced slow-release fertilizer according to the manufacturer's instructions.


Remove any yellowing or dead leaves to maintain plant health and appearance. Divide overcrowded plants every few years to prevent competition for resources and promote vigorous growth. Prune back excessive growth to maintain a tidy appearance and to prevent plants from encroaching on other plants or the pond itself.

Winter Care:

Hardy marginal plants can withstand winter temperatures and require minimal care. Cut back dead foliage in late fall or early spring to tidy up the planting area. In colder regions, consider protecting tender plants with a layer of mulch or covering them with burlap during winter to prevent frost damage.

Monitoring and Troubleshooting:

Regularly inspect plants for signs of pests, diseases, or nutrient deficiencies. Address any issues promptly with appropriate treatments, such as organic insecticides, fungicides, or nutrient amendments. By following these detailed tips and providing proper care, you can create a beautiful and thriving planting zone around your pond, enhancing its visual appeal and supporting a diverse ecosystem.

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