Rodgersia pinnata is a striking herbaceous perennial known for its large, bold foliage and stunning flower spikes. Here is a detailed description and care guide for Rodgersia pinnata:

Description:
Rodgersia pinnata features large, deeply lobed, palmate leaves that can reach up to 3 feet (90 cm) in diameter. The leaves have a coarse texture and are typically a rich green color, although some cultivars may have bronze or reddish hues. The plant forms a clump that can grow up to 3 to 5 feet (90 to 150 cm) in height and spread. In early to midsummer, it sends up tall, upright flower spikes that can reach up to 5 feet (150 cm) in height. The flower spikes are adorned with small, star-shaped flowers that can vary in color, including shades of pink, white, or cream.

Care Guide:

Light: Rodgersia pinnata prefers partial shade to full shade. It thrives in dappled sunlight or areas with filtered light. Avoid planting it in full sun, as it may scorch the leaves.
Soil: Provide a rich, moist, and well-draining soil. Rodgersia pinnata prefers soil that is slightly acidic to neutral. It appreciates consistently moist soil, but it should not be waterlogged.

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Watering: Regular and adequate watering is important for Rodgersia pinnata, especially during hot and dry periods. Keep the soil evenly moist, but avoid overwatering. Mulching around the plant can help retain moisture.

Fertilizer: Apply a balanced, slow-release fertilizer in spring to promote healthy growth. Follow the package instructions for the recommended dosage. Avoid over-fertilizing, as it can lead to excessive leaf growth at the expense of flowers.

Pruning: Remove any dead or damaged leaves as needed throughout the growing season. After the first frost, you can cut back the plant to the ground.

Division: Every 3 to 4 years, consider dividing the plant in early spring to control its size and rejuvenate its growth. Dig up the clump, separate it into smaller sections, and replant them.

Pests and Diseases: Rodgersia pinnata is generally resistant to pests and diseases. However, keep an eye out for slugs and snails, as they may feed on the foliage. Using organic pest control methods or applying slug pellets can help manage these pests.

Winter Care: Rodgersia pinnata is hardy in USDA hardiness zones 5 to 8. In colder regions, provide a layer of mulch around the base of the plant to protect it from freezing temperatures.

By following these care guidelines, you can enjoy the impressive foliage and beautiful flower spikes of Rodgersia pinnata in your garden.