Blue Flag Iris
Neomarica caerulea
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
24 inches
Width
18 inches
Light
Full Sun, Partial Sun
Zones
6, 7, 8, 9
Water
Consistent moisture
Humidity
High humidity preferred
Lifespan
Perennial
Native To
Central America
Toxicity
Non-toxic to pets
The Story
Plant Bio
Neomarica caerulea, commonly known as the walking iris, is a perennial plant noted for its striking blue flowers and arching leaves. Unique for its ability to produce new plantlets from its flower stalks, giving it a distinctive walking effect.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck rhizomes into well-draining soil in full sun or partial shade.
- Mist cuttings regularly to maintain humidity and encourage rooting.
- Water consistently, keeping soil moist but not waterlogged.
- Fertilize monthly with a balanced liquid fertilizer during active growth.
- Prune dead or damaged leaves to promote healthy growth.
- Transplant to larger containers or garden beds in spring after last frost.
Pro Tip
Use a humid environment and consistent watering to promote lush, healthy growth.
Keep It Thriving
Care Guide
Do
- Provide bright, indirect sunlight for optimal growth 🌞
- Keep soil consistently moist but not soggy 💧
- Fertilize monthly during the growing season
- Prune to remove dead or damaged leaves
- Maintain high humidity around cuttings
Don't
- Avoid overwatering which can cause root rot ❌
- Do not expose to direct harsh midday sun in hot climates
- Refrain from using heavy, compacted soil
- Don’t neglect pest monitoring
- Avoid letting soil dry out completely
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Propagate | ||||||||||||
| 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
Blue Flag Iris questions
What zones can Blue Flag Iris grow in?
Blue Flag Iris is hardy in USDA Zones 6–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Blue Flag Iris deer resistant?
Yes — Blue Flag Iris is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Blue Flag Iris bloom?
Blue Flag Iris typically blooms in late spring through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Blue Flag Iris need full sun?
Blue Flag Iris does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Blue Flag Iris drought tolerant?
Yes — once established (usually after the first full season), Blue Flag Iris handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
Keep exploring
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Grow Blue Flag Iris 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.
