Houttuynia cordata 'Plena,' commonly known as Chameleon Plant 'Plena,' is a cultivar of Houttuynia cordata that is valued for its unique double flowers and colorful foliage. Here's a detailed description and care guide for Houttuynia cordata 'Plena':

Description:
Houttuynia cordata 'Plena' is a low-growing perennial plant that typically reaches a height of 8-12 inches (20-30 cm) and spreads vigorously by rhizomes to form dense clumps. The plant features heart-shaped leaves that grow in an alternating pattern along the stems. The foliage of 'Plena' is its main attraction. The leaves are primarily green but are variegated with splashes of cream, yellow, and red. From late spring to summer, 'Plena' produces double flowers that resemble small rosettes. The flowers are typically white or cream in color and have an appealing fragrance. Houttuynia cordata 'Plena' adds both visual and aromatic interest to garden borders, groundcovers, or container plantings.

Care Guide:

Lighting: Houttuynia cordata 'Plena' prefers partial shade to full shade. It grows best in locations with filtered sunlight or dappled shade, especially during the hot afternoon hours. Some shade is beneficial to prevent leaf scorch. However, it can tolerate some morning sun or brighter conditions if the soil remains consistently moist.

Water: Houttuynia cordata 'Plena' prefers consistently moist soil conditions. It naturally occurs in wet habitats, such as stream banks or water edges. Ensure the soil remains evenly moist but not waterlogged. Water deeply when the top inch of soil feels dry to the touch, especially during dry spells or hot weather.

Soil: Houttuynia cordata 'Plena' prefers fertile, well-draining soil. It can tolerate a range of soil types, including loam, clay, or sandy soil. However, it thrives in moist soil conditions. Adding organic matter, such as compost or well-rotted manure, can improve soil fertility and moisture retention.

Temperature: Houttuynia cordata 'Plena' is hardy in USDA hardiness zones 5-9. It can tolerate a range of temperatures but generally prefers moderate conditions. Protect the plant from extreme heat or prolonged periods of frost. Mulching around the base of the plant can help insulate the roots and retain moisture.

Fertilizer: Houttuynia cordata 'Plena' does not require heavy fertilization. A light application of a balanced, slow-release fertilizer in early spring can provide essential nutrients. Avoid over-fertilization, as it can result in excessive leaf growth and reduced variegation.

Maintenance: Houttuynia cordata 'Plena' is a low-maintenance plant. Regular maintenance involves removing any dead or yellowed foliage to maintain a tidy appearance. The plant can spread aggressively, so occasional thinning or trimming may be necessary to control its growth and prevent it from overtaking other plants.

Propagation: Houttuynia cordata 'Plena' can be propagated through division or by taking stem cuttings. Division is best done in early spring or early autumn. Carefully separate the clumps, ensuring each division has healthy roots and stems, and replant them in suitable soil or containers. Stem cuttings can be taken in late spring or early summer and rooted in a moist, well-draining potting mix.

Pests and Diseases: Houttuynia cordata 'Plena' is generally resistant to pests and diseases. However, it may occasionally attract slugs or be susceptible to fungal 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 colorful foliage and double flowers of Houttuynia cordata 'Plena' in your garden borders, groundcovers, or container plantings. 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, Houttuynia cordata 'Plena' can provide an eye-catching and aromatic display, adding interest and charm to your outdoor spaces.