Cairns Rigid Fern
Doodia media 'Cairns'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Fern
Height
12 inches
Width
12 inches
Light
Partial Sun, Shade
Zones
4, 5
Water
Moist
Humidity
High
Lifespan
Perennial
Native To
Australia
Toxicity
Non-toxic to humans and pets
The Story
Plant Bio
Doodia media, commonly known as Kakadu Rasp Fern, is a vigorous, evergreen fern distinguished by its arching fronds with finely divided, fern-like foliage and small, inconspicuous flowers typically hidden among the fronds. The cultivar Cairns is notable for its robust growth habit and lush, deep green fronds that add a tropical touch to shaded garden areas, thriving well in moist, well-drained soils.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck spores or small plants into shaded, moist soil.
- Mist regularly to keep humidity high.
- Provide consistent moisture for healthy growth.
- Mulch to retain soil moisture and suppress weeds.
- Transplant in early spring for best results.
- Divide clumps every 3–4 years to maintain vigor.
Pro Tip
Maintain consistent moisture and shade for optimal growth.
Keep It Thriving
Care Guide
Do
- Keep soil moist and well-drained 🌱
- Provide shade during hot summer days
- Mulch to conserve moisture
- Fertilize with a balanced, diluted fertilizer in spring
Don't
- Avoid direct, harsh sunlight ❌
- Do not let soil dry out completely
- Refrain from using heavy, clay-based soils that drain poorly
- Avoid over-fertilizing to prevent leaf burn
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Mulch | ||||||||||||
| 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
Cairns Rigid Fern questions
What zones can Cairns Rigid Fern grow in?
Cairns Rigid Fern is hardy in USDA Zones 4–5. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Cairns Rigid Fern deer resistant?
Not reliably. Deer may browse Cairns Rigid Fern, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Cairns Rigid Fern bloom?
Cairns Rigid Fern typically blooms in late fall through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Cairns Rigid Fern need full sun?
Cairns Rigid Fern does best in part shade.
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Grow Cairns Rigid Fern 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.
