How to Grow Japanese Sweet Flag Licorice
Wikimedia Commons
Japanese Sweet Flag Licorice
Acorus gramineus 'Ogon'
herbJapanese Sweet Flag Licorice is a dwarf ornamental grass-like perennial with distinctive golden-yellow variegated foliage that emits a sweet, licorice-like fragrance when brushed or crushed. This compact, slow-growing plant is prized for its year-round color and aromatic qualities, making it an excellent choice for containers, rock gardens, and border edging.
When should you plant Japanese Sweet Flag Licorice 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.
Example Japanese Sweet Flag Licorice timeline · Pittsburgh, PA (Zone 6b)
-
Plant Japanese Sweet Flag Licorice
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Japanese Sweet Flag Licorice
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Japanese Sweet Flag Licorice dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-9, with protection in colder regions
Sign up free to see if Japanese Sweet Flag Licorice grows in your zone — and get a personalized planting timeline.
Get my Japanese Sweet Flag Licorice timeline →Growth Stages
Establishment
4-8 weeksNewly planted rhizomes develop shallow root systems and initial foliage emerges as thin, blade-like leaves
Keep soil consistently moist, provide light shade initially, and avoid disturbance. High humidity aids establishment.
Vegetative Growth
Spring through early summerPlant develops dense clumps of gold-yellow variegated, grass-like foliage reaching 8-10 inches tall
Maintain moisture, provide partial shade in hot climates to prevent leaf scorch, and feed monthly with balanced fertilizer during growing season
Flowering
4-6 weeksInsignificant greenish-white spadix flowers emerge in late spring to early summer; flowers are minor ornamental feature
No special care needed; remove spent flowers if desired for neater appearance
Summer Maintenance
June through AugustPlant maintains lush foliage; golden coloration may fade slightly in deep shade or extreme heat
Increase watering during hot, dry periods; mist foliage to maintain humidity; apply mulch around base to retain moisture
Dormancy/Winter
November through FebruaryFoliage persists but growth slows significantly; color may darken slightly in cooler temperatures
Reduce watering but maintain some moisture; protect from harsh winds and extreme cold in zones 5-6; consider mulching base in colder regions
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Increase humidity through misting; spray with water or neem oil if infestation occurs; isolate affected plants
-
Remove with cotton swab dipped in rubbing alcohol; apply insecticidal soap; improve air circulation
-
Scrape off manually or treat with horticultural oil; isolate plant to prevent spread
Uses
Aromatic garnish and tea ingredient
CulinaryThe sweet, licorice-scented foliage can be used fresh as a fragrant garnish for desserts, beverages, and Asian dishes. Dried leaves create a pleasant herbal tea with subtle anise-like notes. [source]
Traditional herbal remedy
MedicinalIn traditional Asian herbalism, particularly Japanese and Chinese medicine, Acorus species are used to support digestion, mental clarity, and respiratory function. The aromatic properties are believed to have calming effects. [source]
Natural fragrance and air freshener
HouseholdThe crushed or dried foliage releases a pleasant licorice-anise aroma, making it ideal for potpourri, sachets, and natural air freshening. Place dried leaves in closets or drawers for subtle fragrance. [source]
Ornamental container and landscape accent
CraftThe striking golden-yellow variegated foliage makes it an excellent focal point in container gardens, rock gardens, and shade borders. Its compact, clumping growth habit provides year-round visual interest. [source]
Decorative plant for water gardens
WildlifeThough drought-tolerant once established, this plant thrives in moist conditions and can be grown at pond margins or in rain gardens, where it provides shelter for beneficial insects. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
This plant is grown ornamentally; harvest foliage by cutting individual leaves near the base as needed for aromatic purposes. Avoid harvesting more than one-third of foliage at once to maintain plant appearance. Best harvested in morning when essential oils are most concentrated.
Fun Facts
- 🌱 The genus Acorus has been used in traditional medicine for over 2,000 years, particularly in Ayurvedic and Chinese herbal practices, where it is valued for promoting mental clarity and focus.
- 🌱 The foliage of Japanese Sweet Flag Licorice contains aromatic compounds similar to those found in true licorice root (Glycyrrhiza glabra), though it is not related and lacks the sweetness of actual licorice.
- 🌱 This plant is extremely slow-growing and long-lived; a single plant can persist and gradually expand for decades with minimal care, making it an excellent low-maintenance investment for container or garden spaces.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Japanese Sweet Flag Licorice planting timeline
Tell us your zip code and we'll calculate exactly when to start Japanese Sweet Flag Licorice 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 Japanese Sweet Flag Licorice timeline →