Acorus Gramineus Ogon Aquatic Pond Plant - Sweet Flag

Aquatic Plants
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Acorus gramineus 'Ogon', commonly known as Golden Variegated Sweet Flag or Golden Japanese Rush, is a compact perennial grass-like plant with vibrant golden-yellow foliage. Here's a detailed description and care guide for Acorus gramineus 'Ogon':

Acorus gramineus 'Ogon' features narrow, arching leaves that are bright golden-yellow in color. The foliage forms dense clumps, reaching a height of about 6-12 inches (15-30 cm) with a spread of 12-18 inches (30-45 cm). The leaves are semi-evergreen, providing year-round interest in mild climates. This cultivar does not produce significant flowers or seeds, but its vibrant foliage is the main attraction.

Care Guide:

Lighting: Acorus gramineus 'Ogon' thrives in partial shade to full shade. It prefers bright indirect light or morning sun with protection from intense afternoon sunlight. Too much direct sunlight may cause leaf scorching, so providing some shade during the hottest part of the day is beneficial.

Water: Acorus gramineus 'Ogon' prefers consistently moist soil. It tolerates wetter conditions, making it suitable for water gardens, bog gardens, or areas with poor drainage. Water regularly to keep the soil evenly moist, but avoid waterlogging or allowing the plant to sit in standing water.

Soil: Acorus gramineus 'Ogon' prefers well-draining soil that is rich in organic matter. It can tolerate a wide range of soil types, including sandy, loamy, or clay soils. Ensure that the soil remains consistently moist but not waterlogged.

Temperature: Acorus gramineus 'Ogon' is hardy in USDA hardiness zones 5-9. It can tolerate a range of temperatures but prefers cooler climates. In hot regions, providing partial shade or protection from intense sunlight can help prevent leaf burn.

Fertilization: Acorus gramineus 'Ogon' generally does not require heavy fertilization. However, you can provide a balanced, slow-release fertilizer in spring or use a diluted liquid fertilizer during the growing season to enhance its growth and color. Follow the manufacturer's instructions for application rates.

Maintenance: Acorus gramineus 'Ogon' is a low-maintenance plant. Regularly remove any dead or damaged leaves to maintain its appearance. It is not necessary to prune this plant unless you want to tidy up its appearance. Dividing the clumps every few years in early spring can help rejuvenate growth and prevent overcrowding.

Pests and Diseases: Acorus gramineus 'Ogon' is generally resistant to pests and diseases. However, it may occasionally attract slugs or snails. Monitor the plant regularly and take appropriate measures to control these pests if necessary.

Propagation: Acorus gramineus 'Ogon' can be propagated through division. Divide the clumps in early spring or fall, ensuring that each division has a healthy portion of rhizome and foliage. Replant the divisions in suitable soil, water thoroughly, and keep them adequately moist until established.

By following these care guidelines, you can enjoy the vibrant golden foliage of Acorus gramineus 'Ogon' in your garden. Adjust the care routine based on your specific growing conditions and monitor the plant for any signs of stress or disease. With proper care, Acorus gramineus 'Ogon' can provide a beautiful and colorful addition to borders, water features, or container plantings.

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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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