How to Grow Ornamental Grasses (Stipa and Bouteloua)

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Ornamental Grasses (Stipa and Bouteloua)

Stipa spp. and Bouteloua spp.

grass

Ornamental grasses including feather grass (Stipa) and grama grass (Bouteloua) are decorative perennial grasses prized for their fine texture, graceful movement, and striking seed heads. These drought-tolerant, low-maintenance plants are native to steppe and prairie ecosystems and serve as focal points in contemporary and naturalistic garden designs. They provide year-round visual interest, wildlife habitat, and require minimal fertilization or pest management.

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Example Ornamental Grasses (Stipa and Bouteloua) timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Ornamental Grasses (Stipa and Bouteloua)

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Ornamental Grasses (Stipa and Bouteloua)

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Ornamental Grasses (Stipa and Bouteloua) dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily minimum; 8+ hours preferred for best color and vigor
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Water: Low water needs once established. Water deeply but infrequently during the first growing season to establish deep roots. Mature plants are drought-tolerant; supplement only during extended dry spells. Reduce watering in cool/wet seasons to prevent rot.
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Spacing: 18-36 inches depending on species and ultimate size; Stipa 24-36 inches, Bouteloua 18-24 inches inches
📅
Days to maturity: Full maturity 2-3 years from transplant; ornamental seed heads appear year one if conditions are favorable
🌱
Planting depth: Plant crown level with soil surface; do not bury. Sow seed ¼-½ inch deep.

Soil

Type: Well-draining, sandy to gravelly soil; poor to moderately fertile loam
pH: 6.0-8.0
Amendments:
Coarse sand or gravel for drainage Minimal compost (avoid heavy feeding) Perlite for clay soils

Growing Zones

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Stipa thrives in zones 3-9; Bouteloua in zones 4-10, depending on specific species. Both prefer cooler to warm arid and semi-arid climates.

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a

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Growth Stages

1

Seedling/Establishment

4-6 weeks from germination to visible growth

Fine, hair-like green foliage emerges slowly. Plants are small and delicate in first year.

Keep soil consistently moist (not wet) the first season. Provide afternoon shade in hot climates. Mulch lightly around base to retain moisture but avoid piling mulch on crown.

2

Vegetative Growth

Months 2-12 (year one); all of year two

Plant expands laterally, developing dense clumps of fine, upright or arching foliage. Growth accelerates in year two.

Reduce supplemental watering. Do not fertilize heavily—excess nitrogen promotes soft growth and reduces drought tolerance. Remove any dead material.

3

Flowering/Seed Head Development

6-10 weeks (typically July-September depending on region)

Delicate, feathery flower panicles or seed heads emerge above the foliage canopy in mid to late summer. Stipa produces ethereal, plumed heads; Bouteloua displays short, distinctive combs or spikes.

Do not deadhead if seed and year-round structure are desired. Ensure full sun exposure for best seed head development. Reduce watering further as plant hardens off.

4

Maturation & Winter Interest

October-March in most climates

Seed heads persist and often fade to golden, tan, or reddish hues. Foliage may bronze or tan in cool weather. Plants harden off completely.

Allow dead foliage and seed heads to remain for winter interest and wildlife habitat. Do not prune in fall. Begin spring cleanup only after new growth emerges.

5

Spring Renewal

3-4 weeks

New green growth emerges from the base as soil warms. Old foliage can be cut back just before or as new shoots appear.

Cut back Stipa and Bouteloua to 2-4 inches above ground in early spring (late February to early April). Use pruning shears or hedge trimmers. Rake away dead material. Resume normal watering as growth accelerates.

Companion Planting

Plan your garden →

Plant with:

Salvia (sage) Coreopsis Rudbeckia (black-eyed Susan) Echinacea (coneflower) Sedum Allium Lavender Gaura Catmint (Nepeta) Russian sage (Perovskia)

Avoid planting near:

Moisture-loving plants (hostas, ferns, astilbe) Aggressive spreaders in confined spaces (mint, bamboo) Plants requiring frequent fertilization Shade-dependent species that compete for sun

Common Pests

  • and

    Generally not a major problem. Hand-pick or tolerate minor damage. In severe infestations, use neem oil or spinosad as last resort.

  • Ensure excellent air circulation; avoid overhead watering. Remove affected foliage. Apply sulfur-based fungicide if severe. Improve drainage and reduce humidity.

  • Remove and dispose of affected seed heads before spores spread. Ensure good air flow and avoid excess moisture.

  • Improve drainage immediately. Amend soil with sand and gravel. Do not overwater. In severe cases, transplant to better-draining location.

Uses

🌿

Ornamental focal points and texture

Landscape

Stipa and Bouteloua provide fine, delicate texture and graceful movement in the garden. Their tall, airy seed heads create striking vertical accents and backlit silhouettes, especially beautiful in evening light. [source]

🦋

Wildlife habitat and food source

Wildlife

Seed heads provide essential food for birds and small mammals throughout fall and winter. The dense foliage offers shelter for beneficial insects and ground-nesting birds. [source]

🎨

Dried floral arrangements

Craft

Feathery Stipa seed heads are highly prized by florists and crafters for dried bouquets, wreaths, and decorative arrangements. Their natural plumage requires no treatment or dyeing. [source]

🏠

Erosion control and soil stabilization

Household

Deep root systems of Stipa and Bouteloua help stabilize slopes and control erosion. These grasses are commonly used in restoration ecology and drought-resistant landscaping. [source]

🌿

Drought and climate resilience

Environmental

Both genera are highly adapted to arid and semi-arid climates with minimal rainfall. They require no supplemental irrigation, fertilizer, or pesticides once established, making them sustainable choices for water-conservation landscapes. [source]

Harvest Tips

Ornamental grasses are not harvested for consumption. For dried arrangements or cut ornaments, harvest seed heads in late summer to early fall once they have developed full plumage and color but before they shatter. Cut stems just above the foliage and hang upside down in a warm, airy location to dry (1-2 weeks). Leave seed heads on plant through winter for landscape interest and wildlife food.

Fun Facts

  • 🌱 Stipa species, particularly Stipa pennata (feather grass), have feathery awns that are not only beautiful but also function as sophisticated seed dispersal mechanisms—they rotate in response to humidity changes, literally 'walking' seeds across the ground into favorable growing spots.
  • 🌱 Bouteloua gracilis (blue grama) is a foundational native grass of North American tallgrass and shortgrass prairies, and its presence indicates healthy, undisturbed prairie ecosystems. It was critical to the survival of bison and other grazing animals for millennia.
  • 🌱 Ornamental grasses remain ornamental through multiple seasons: green and fine-textured in spring/summer, golden or bronze in fall, and silvery or bleached in winter, providing year-round garden interest without replanting.

Gardening Terms

New to gardening? Learn about terms used in this guide:

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