How to Grow Nutans

Wikimedia Commons

Nutans

Acorus gramineus 'Nutans'

grass

Nutans is a dwarf, weeping cultivar of Japanese sweet flag characterized by its graceful, arching foliage that droops elegantly from the center. This ornamental grass-like perennial is prized for its fine texture and compact growth habit, making it ideal for small spaces, containers, and water gardens. It produces delicate, inconspicuous flowers and has mild aromatic properties when foliage is brushed.

When should you plant Nutans in your zone?

Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.

Get my Nutans timeline →

Example Nutans timeline · Pittsburgh, PA (Zone 6b)

Plant Nutans
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Nutans
Around Apr 25

≈ 8 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Nutans dates for your own zip code.

Growing Conditions

☀️

Sun: Partial shade to partial sun; 3-5 hours of indirect light daily. Tolerates full shade but grows more compact in brighter conditions.

💧

Water: Consistently moist to wet soil; excellent for bog gardens and pond margins. In containers, keep soil evenly moist but not waterlogged. Does not tolerate drought.

📏

Spacing: 12-18 inches

📅

Days to maturity: Mature foliage appearance in 8-12 weeks from planting

🌱

Planting depth: Plant at same depth as nursery container; rhizome should be at or just below soil surface

Soil

Type: Moist, well-draining loamy or peat-based soil

pH: 5.5-7.0

Amendments:

Peat moss Compost Coconut coir for moisture retention

Growing Zones

Find your zone →

Thrives in zones 6-10; best in zones 7-9

6a 6b 7a 7b 8a 8b 9a 9b 10a 10b

Get my Nutans timeline →

Growth Stages

Establishment

3-4 weeks

Young plant with upright to slightly arching foliage; leaves are narrow, grass-like, and bright green

Keep soil consistently moist; provide dappled shade; protect from direct afternoon sun. Water daily until established.

Vegetative Growth

4-8 weeks

Foliage develops characteristic weeping habit; plants fill out with graceful, pendulous leaves forming a mounding shape

Maintain consistent moisture; no fertilizer needed if soil is rich; remove any dead foliage. Feed monthly with diluted balanced fertilizer if grown in containers.

Maturity

Ongoing (perennial)

Full weeping form achieved; dense clump of fine, arching foliage; plant reaches 6-12 inches tall

Continue consistent watering; divide every 3-4 years if plants become overcrowded. No deadheading needed.

Flowering

2-4 weeks

Inconspicuous greenish-white flower spikes emerge from foliage center; not ornamentally significant

Flowers appear in late spring to early summer. No special care needed; they are minor compared to foliage interest.

Dormancy/Winter

12 weeks (cold climates only)

Foliage may brown or die back in cold zones (6-7); evergreen or semi-evergreen in warmer zones

In cold zones, cut back dead foliage in early spring. Mulch around base in zone 6. In zones 8+, little to no winter care needed.

Companion Planting

Plan your garden →

Plant with:

Hostas Astilbe Ferns Carex sedges Ajuga Liriope Dwarf Japanese maple Brunnera Heuchera

Avoid planting near:

Aggressive spreading sedges or grasses Large perennials that shade excessively Plants requiring consistently dry soil

Common Pests

Increase humidity; mist foliage regularly. Use insecticidal soap if infestations develop.
and
Remove debris and weeds; use copper barriers; hand-pick in evening. Apply slug bait if severe.
Prune affected foliage; spray with horticultural oil during dormancy if needed.

Uses

🎨

Floral Arrangements & Textural Interest

Craft

The graceful, weeping foliage adds delicate texture and movement to cut flower arrangements, garden design, and container plantings. Its fine, arching form contrasts beautifully with bolder-textured plants. [source]

🏠

Container & Accent Gardening

Household

Nutans is ideal for small spaces, rock gardens, pond margins, and decorative containers. Its compact, cascading form works beautifully in hanging baskets and as an accent plant in mixed containers. [source]

🦋

Habitat for Small Aquatic Creatures

Wildlife

When grown at pond or water garden edges, Nutans provides shelter and microhabitat for beneficial insects, frogs, and other small aquatic fauna. [source]

🍳

Mild Aromatic Flavoring

Culinary

Japanese sweet flag foliage has subtle aromatic properties and is used traditionally in Asian cuisine and beverages. Use sparingly for delicate, mild flavor in teas or as garnish. [source]

Harvest Tips

Nutans is an ornamental foliage plant, not typically harvested. Foliage can be used in floral arrangements; cut stems will last 1-2 weeks in water. For propagation, divide rhizomes in spring.

Fun Facts

🌱 Acorus gramineus 'Nutans' is sometimes called the 'Weeping Japanese Sweet Flag' due to its distinctive drooping foliage habit, which is unusual among Acorus species.
🌱 Despite being named a 'grass,' Nutans is not a true grass but rather a member of the Araceae (arum) family, closely related to calla lilies and anthuriums.
🌱 Nutans foliage releases a faint, pleasant aromatic scent when brushed or handled, a characteristic inherited from its parent species Acorus gramineus, which has been used in traditional Asian medicine and perfumery for centuries.

Gardening Terms

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

Cultivar Deadhead Mulch Partial Shade Perennial

Shop Nutans plants and related plants at Plant Addicts →

Join 30,000 gardeners planning their gardens with LizPlants.

Get your personalized Nutans planting timeline

Tell us your zip code and we'll calculate exactly when to start Nutans seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.

Get my Nutans timeline →