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River Oat Grass

Chasmanthium latifolium

$16.00

1 Gallon | Hardiness Zones 5-9

Chasmanthium (Uiola) latifolium is a luxuriant and shade tolerant perennial grass with relatively wide leaf blades and taller spikes of drooping seed heads much like "Sea Oats". Attrative in the garden and seed stalks a great component for dried arrangements. Re-seeds and may become somewhat invasive in favorable garden situations but not hard to control. Native to eastern U.S.

Photos courtesy of Joseph A. Marcus

Pickup available at Aiken Nursery

Usually ready in 2-4 days

PLANT DETAILS

Hardiness Zones: 5 - 9

Soil: Well-drained

Sun: Full Sun and Part Shade

Seasonal Behavior: Deciduous

Growth Rate: Fast

Height at Maturity: 2 - 3 Feet

Spread at Maturity: 15 - 18 Inches

Flower Structure: Produces flat, drooping, oat-like seed heads.

Blooming Season: Blooms from mid-summer to early fall.

Color: The seed heads start green and mature to a golden tan, providing visual interest throughout the growing season.

Dark green, turning to bronze

Light Requirements: Prefers partial shade to full shade. It can tolerate full sun, especially in cooler climates, but partial shade is ideal for maintaining vibrant foliage color.

Soil Requirements: Thrives in moist, well-draining soil. It is adaptable to various soil types, including loamy, sandy, and clay soils. It prefers slightly acidic to neutral pH (6.0-7.0). Adding organic matter like compost can improve soil fertility and drainage.

Watering: Requires regular watering, especially during dry periods and the first growing season to establish a deep root system. Keep the soil consistently moist but not waterlogged. Once established, it can tolerate some drought but performs best with consistent moisture.

Temperature and Humidity: Hardy in USDA zones 5-9. Prefers moderate temperatures and can tolerate a range of humidity levels. It is adaptable to both dry and moist conditions once established.

Fertilization: Generally does not require heavy fertilization. If growth appears slow or foliage color fades, apply a balanced, slow-release fertilizer in early spring. An annual application of compost can enhance soil fertility.

Pruning: Cut back the old foliage to the ground in late winter or early spring before new growth begins. This helps to tidy the plant and promote vigorous new growth. Remove any dead or damaged stems throughout the growing season to maintain its appearance.

Pests and Problems: Generally pest-free and disease-resistant. Ensure good air circulation to prevent fungal diseases. If pests like aphids are detected, treat with insecticidal soap or neem oil.

Suitable Environment: Ideal for shaded garden areas, woodland gardens, and along borders. Its attractive, arching seed heads and bamboo-like foliage add texture and interest to the landscape. It can also be used in container gardening for patios and terraces.

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