How to Grow Ravenna Grass
iNaturalist
Ravenna Grass
Saccharum ravennae
grassRavenna grass is a tall, ornamental perennial grass prized for its dramatic silvery-white plumes that emerge in late summer and persist into winter. It grows 8-12 feet tall with graceful, arching foliage that creates movement and texture in landscapes. This Mediterranean native adds vertical interest and is often used as a specimen plant or in mass plantings for dramatic seasonal displays.
When should you plant Ravenna Grass in your zone?
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Example Ravenna Grass timeline · Pittsburgh, PA (Zone 6b)
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Plant Ravenna Grass
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Ravenna Grass
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Ravenna Grass dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-9, with best performance in zones 6-8
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Get my Ravenna Grass timeline →Growth Stages
Germination & Seedling
3-4 weeksTiny grass shoots emerge and develop fine, hair-like leaves. Growth is slow initially.
Keep soil consistently moist but not waterlogged. Provide bright light. Thin seedlings to proper spacing if direct seeded.
Establishment
4-8 monthsRoot system develops and foliage expands. Plant grows 1-2 feet tall with increasingly dense clumps of narrow, blue-green leaves.
Water regularly during first growing season. Mulch around base to conserve moisture and suppress weeds. Avoid fertilizing with nitrogen-heavy products.
Vegetative Growth
12-24 monthsPlant continues expanding, producing wider clumps with more graceful, arching foliage. Height reaches 4-6 feet by late summer of year 2.
Reduce watering frequency as plant establishes. Remove any dead or damaged foliage. No fertilizer needed once established.
Flowering & Plume Formation
2-3 months of development; plumes persist 4-6 monthsIn late August through September of year 2 or 3, tall flower stems (panicles) emerge and develop distinctive silvery-white, feathery plumes that can reach 12+ inches long.
Allow plumes to fully develop and dry on plant. Do not cut back yet. Plumes persist through fall and winter, providing ornamental interest.
Dormancy & Spring Renewal
3-4 monthsFoliage dies back completely in winter in colder zones or becomes brown/tan. Plumes remain attractive through winter.
In early spring (late February to March), cut back entire plant to 4-6 inches above ground before new growth emerges. Rake out accumulated dead material.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Generally not problematic in ornamental settings. Remove affected foliage if severe; rarely requires intervention.
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Ensure good air circulation and avoid overhead watering. Remove affected foliage in late fall cleanup. Fungicides rarely necessary.
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Improve drainage and reduce moisture on foliage. Thin plant to increase airflow. Remove affected leaves.
Uses
Dried Floral Arrangements
HouseholdThe silvery-white plumes are highly prized for dried flower arrangements, wreaths, and decorative displays. Plumes last many months when dried and add elegant, airy texture to indoor arrangements. [source]
Landscape Focal Point & Privacy Screen
HouseholdTall mature plants create dramatic vertical accents in garden design and can be grouped to form natural screens or windbreaks. The graceful, arching habit provides year-round structure. [source]
Wildlife Habitat & Seed Source
WildlifeThe dense foliage provides shelter and nesting habitat for birds. Seeds and dried plant material offer foraging opportunities for wildlife and beneficial insects. [source]
Wedding & Event Decoration
CraftFloral designers prize Ravenna grass plumes for wedding bouquets, centerpieces, and event installations due to their elegant appearance and longevity. [source]
Harvest Tips
Ravenna grass is not harvested for food or traditional uses. For ornamental plumes, allow them to fully dry and mature on the plant (September-November). Cut plumes in late fall or early winter for dried arrangements; they should snap cleanly from the stem when fully mature. Cut back entire plant in early spring before new growth.
Fun Facts
- 🌱 Ravenna grass is also called 'Erianthus ravennae' and was reclassified to the Saccharum genus in 2006 based on genetic studies, though it is unrelated to sugar cane despite being in the same genus.
- 🌱 The plumes can grow up to 2-3 feet above the foliage, making mature plants reach 12+ feet tall in ideal conditions—among the tallest ornamental grasses commonly grown in temperate climates.
- 🌱 Ravenna grass was named after Ravenna, Italy, but the plant is native to subtropical and Mediterranean regions from the Middle East to North Africa, thriving in hot, dry climates before being adopted as an ornamental in European and North American gardens.
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