Ornamental Grasses Plant Guide

Various genera

Movement, texture, and year-round interest. Ornamental grasses add a naturalistic, modern element to any garden with minimal care required.

Quick Facts

Hardiness Zones3-11 (varies by species)

SunFull sun to partial shade

WaterLow to moderate

SoilMost well-drained soils

Height1-10 feet (varies by species)

Spread2-6 feet

Bloom TimeLate summer to fall (plumes persist through winter)

Privacy screeningModern gardensBordersMass plantingContainersNaturalistic design

Why Grow Ornamental Grasses

Ornamental grasses bring something no other plant group offers: movement. They sway, rustle, and shimmer in every breeze, adding a dynamic element to static gardens. Their feathery plumes catch autumn light beautifully, and their dried forms provide winter structure when everything else has died back. They're drought-tolerant, pest-free, and almost maintenance-free.

Best Varieties

Miscanthus sinensis 'Morning Light' (6 feet, silvery variegated, graceful) is the most popular large grass. Karl Foerster feather reed grass (5 feet, strictly upright, earliest to bloom) is perfect for narrow spaces. Fountain grass (Pennisetum, 3 feet, arching with fuzzy plumes) suits borders. Blue oat grass (Helictotrichon, 2 feet, steel-blue) is stunning as a specimen. Mexican feather grass (Nassella, 2 feet) creates the most movement.

Design with Grasses

Mass a single variety for modern impact — a drift of 20+ Karl Foerster creates a living wall of movement. Mix grasses with perennials in naturalistic combinations (Piet Oudolf style). Use tall grasses for screening instead of a hedge — they're faster and softer. Edge a patio with low grasses for a prairie-meets-modern look. A single specimen grass in a large pot makes a striking container focal point.

Care and Maintenance

Cut back deciduous grasses to 4-6 inches in late winter before new growth emerges — this is the only annual maintenance needed. Leave evergreen grasses uncut and just comb out dead foliage. Never cut grasses in fall — their winter form is half their value. Divide clumps every 3-4 years in spring if they develop a dead center. Most grasses need no fertilizer.

Companion Plants

Ornamental Grasses pairs beautifully with:

EchinaceaBlack-eyed SusanSedumAsterSalvia

Frequently Asked Questions

When do you cut back ornamental grasses?

Cut deciduous grasses to 4-6 inches in late February or early March before new growth starts. Leave them standing through winter for visual interest and wildlife shelter.

Do ornamental grasses spread invasively?

Clumping grasses (Miscanthus, Pennisetum, Calamagrostis) stay in place. Avoid running grasses like ribbon grass (Phalaris) which can spread aggressively. Always choose clumping types.

What is the best grass for privacy?

Miscanthus sinensis varieties grow 6-10 feet tall and create effective seasonal screening. For year-round privacy, combine with evergreen shrubs behind the grasses.

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