Gracillimus maiden grass (Miscanthus sinensis 'Gracillimus') is a popular, low-maintenance, clump-forming ornamental grass, known for its fine-textured, narrow green foliage with a silver midrib. It forms 4–7 ft tall, upright-arching, fountain-like clumps that turn golden in fall, with coppery plumes appearing in late summer, lasting into winter. 
Key Characteristics & Growth
Size: Typically 4–7 feet tall and 3–6 feet wide.
Growth Rate: Moderate to fast.
Foliage: Narrow, green leaves with a distinct silvery midrib.
Flowers: Copper-colored, tassel-like plumes appear in late August/September, turning silvery-white in fall.
Winter Interest: Foliage dries to a straw-beige color, remaining standing throughout winter. 
Planting and Care
Light: Full sun to partial shade; best flowering occurs in full sun.
Soil: Adaptable to various soil types, including clay, but prefers well-drained, moderately fertile soil.
Water: Medium water needs, but displays good drought tolerance once established.
Spacing: Plant 3–6 feet apart to allow for proper air circulation.
Maintenance: Cut back to 6 inches in early spring to make way for new growth.
Zones: USDA Hardiness Zones 5–9.