Large Blue Scilla
Merwilla plumbea
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Bulb Corm Tuber
Height
36 inches
Width
18 inches
Light
Full Sun, Partial Sun
Zones
9
Water
Moderate during growth, dry during dormancy
Humidity
Low to moderate
Lifespan
Perennial
Native To
South Africa
Toxicity
All parts are poisonous if ingested.
The Story
Plant Bio
Merwilla plumbea is a bulbous perennial plant featuring grass-like, narrow leaves and striking, bell-shaped blue flowers that are borne in dense clusters during the flowering season. This species is notable for its vibrant blue flowers that attract pollinators and its suitability for rock gardens, borders, and container cultivation in well-drained soils.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck corms 3 inches deep in well-drained soil
- Water regularly during growing season, avoid overwatering
- Place in full sun to partial shade for best blooms
- Fertilize with balanced fertilizer in early spring
- Mulch lightly to retain moisture and suppress weeds
- Divide clumps every 3-4 years in late summer
Pro Tip
Plant in well-drained soil and avoid overwatering to prevent rot.
Keep It Thriving
Care Guide
Do
- Water during dry spells 🌱
- Provide full sun for vibrant blooms
- Apply balanced fertilizer annually
- Mulch to retain moisture
Don't
- Overwater in winter ❌
- Plant in poorly drained soil ❌
- Forget to divide every few years ❌
- Expose to heavy frost without protection ❌
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Lift Store | ||||||||||||
| Plant |
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
Large Blue Scilla questions
What zones can Large Blue Scilla grow in?
Large Blue Scilla is hardy in USDA Zones 9–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Large Blue Scilla deer resistant?
Not reliably. Deer may browse Large Blue Scilla, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Large Blue Scilla bloom?
Large Blue Scilla typically blooms in spring through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Large Blue Scilla need full sun?
Large Blue Scilla does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Large Blue Scilla drought tolerant?
Yes — once established (usually after the first full season), Large Blue Scilla 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 Large Blue Scilla 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.
