Variegated Sweet Flag
Acorus calamus 'Variegatus'
Essentials
At a Glance
Plant Type
Perennial
Height
30 inches
Width
24 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8, 9
Water
High moisture requirement
Humidity
Prefers humid environments
Lifespan
Perennial
Native To
Europe and Asia
Toxicity
All parts may cause stomach upset if ingested. Certain varieties contain beta-asarone, which is a known carcinogen; use with caution.
The Story
Plant Bio
A marginal aquatic, rhizomatous perennial with iris-like, aromatic leaves. It forms dense colonies in wet soils and shallow water. Features striking creamy-white and green striped, sword-like leaves that are aromatic when bruised. The variegation is most pronounced in spring.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Select a moist, well-drained soil with high organic matter.
- Plant rhizomes 1-2 inches deep in partial shade or full sun.
- Water regularly to keep soil consistently moist, especially during dry spells.
- Apply a balanced fertilizer in early spring to promote healthy growth.
- Mulch around the plants to retain moisture and suppress weeds.
- Divide clumps every 2-3 years in early spring to maintain vigor.
Pro Tip
Ensure consistent moisture and avoid drought stress for vibrant variegated foliage.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist 🌱
- Provide partial shade in hot climates
- Fertilize in spring with a balanced fertilizer
- Divide clumps every few years
- Mulch to retain moisture
Don't
- Allow soil to dry out completely ❌
- Use high nitrogen fertilizer excessively
- Plant in overly sunny or dry locations ❌
- Ignore dividing when clumps become crowded
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Fertilize | ||||||||||||
| Plant | ||||||||||||
| Prune | ||||||||||||
| 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
Variegated Sweet Flag questions
What zones can Variegated Sweet Flag grow in?
Variegated Sweet Flag 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 Variegated Sweet Flag deer resistant?
Yes — Variegated Sweet Flag is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Variegated Sweet Flag bloom?
Variegated Sweet Flag typically blooms in early summer through mid-summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Variegated Sweet Flag need full sun?
Variegated Sweet Flag does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
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'
Japanese Sweet Flag Ogon
Acorus gramineus 'Ogon'
Keep exploring
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Grow Variegated Sweet Flag 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.
