Japanese Sweet Flag Ogon
Acorus gramineus 'Ogon'
Essentials
At a Glance
Plant Type
Perennial
Height
8 inches
Width
12 inches
Light
Partial Sun, Shade
Zones
4, 5, 6, 7, 8, 9
Water
Moist to wet soil
Humidity
Prefers high humidity
Lifespan
Perennial
Native To
Asia
Toxicity
May cause stomach upset if ingested
The Story
Plant Bio
Acorus gramineus 'Ogon' is a low-growing, grass-like perennial with narrow, upright, golden-yellow foliage that creates a bright, ornamental ground cover. Its subtle flowers are inconspicuous but add to its texture. This cultivar is distinguished by its vibrant, golden-yellow leaves that maintain their color throughout the growing season, providing striking contrast in garden borders and water features.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Tuck rhizomes into moist soil in early spring
- Water regularly to keep soil consistently moist
- Mulch around plants to retain moisture and suppress weeds
- Divide every 3-4 years in early spring to promote growth
- Mist foliage during dry periods to prevent dehydration
- Place in shaded to partially shaded areas for best color
Pro Tip
Ensure soil remains moist and avoid full sun for vibrant foliage
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist 🌱
- Mulch to conserve moisture
- Divide every few years for healthy growth
Don't
- Avoid letting soil dry out completely ❌
- Don’t expose to full sunlight in hot climates
- Avoid heavy, poorly-drained soils
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Plant | ||||||||||||
| Spring Cleanup |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Japanese Sweet Flag Ogon questions
What zones can Japanese Sweet Flag Ogon grow in?
Japanese Sweet Flag Ogon is hardy in USDA Zones 4–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Japanese Sweet Flag Ogon deer resistant?
Not reliably. Deer may browse Japanese Sweet Flag Ogon, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Japanese Sweet Flag Ogon bloom?
Japanese Sweet Flag Ogon typically blooms in late spring through late spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Japanese Sweet Flag Ogon need full sun?
Japanese Sweet Flag Ogon does best in part shade.
More Acorus to compare
Golden Japanese Sweet Flag
Acorus gramineus 'Wogon'
Variegated Sweet Flag
Acorus calamus 'Golden Variegated'
Licorice Japanese Sweet Flag
Acorus gramineus 'Licorice'
Variegated Japanese Sweet Flag
Acorus gramineus 'Hakuro Nishiki'
Dwarf Sweet Flag
Acorus gramineus 'Pusillus'
Variegated Sweet Flag
Acorus calamus 'Variegatus'
Keep exploring
Explore the genus
Collections featuring this plant
Grow Japanese Sweet Flag Ogon with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
