Essentials
At a Glance
Plant Type
Perennial
Height
48 inches
Width
48 inches
Light
Full Sun, Partial Sun
Zones
8, 9
Water
Moist
Humidity
High
Lifespan
Perennial
Native To
Tropical Asia
Toxicity
Toxic if ingested
The Story
Plant Bio
Crinum asiaticum, commonly known as Poison Bulb or Giant Crinum, is a large, evergreen perennial with broad, strap-shaped leaves and tall flower spikes bearing trumpet-shaped, fragrant white flowers. This species is notable for its substantial size and robust growth, making it an impressive feature in tropical and subtropical gardens, with some cultivars exhibiting variegated foliage.
Bloom Period:
Uses & Benefits:
Planting
How to Grow
- Tuck bulbs 4-6 inches deep into moist soil.
- Water regularly to keep soil consistently moist.
- Place in a location with partial sun to full sun.
- Fertilize monthly during the growing season.
- Mulch to retain soil moisture and temperature.
- Divide bulbs every 3-4 years for propagation.
Pro Tip
Ensure soil remains consistently moist for optimal growth.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist 🌱
- Apply a balanced fertilizer monthly
- Mulch around the plant to conserve moisture
Don't
- Avoid letting soil dry out completely ❌
- Do not expose to freezing temperatures
- Avoid over-fertilizing, which can cause foliage burn
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Fertilize | ||||||||||||
| Pest Check | ||||||||||||
| Plant | ||||||||||||
| Winter Prep |
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
Grand Crinum Lily questions
What zones can Grand Crinum Lily grow in?
Grand Crinum Lily is hardy in USDA Zones 8–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Grand Crinum Lily deer resistant?
Yes — Grand Crinum Lily is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Grand Crinum Lily bloom?
Grand Crinum Lily typically blooms in late summer through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Grand Crinum Lily need full sun?
Grand Crinum Lily does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
More Crinum to compare
Crinum Lily Ollene
Crinum x hybrida 'Ollene'
Crinum x augustum Spider Lily
Crinum x augustum
Crinum Lily Mystery
Crinum x hybrida 'Mystery'
Stars and Stripes Crinum Lily
Crinum x digweedii 'Stars and Stripes'
Crinum x herbertii Carroll Abbott
Crinum x herbertii 'Carroll Abbott'
Sangria Crinum Lily
Crinum x hybrida 'Sangria'
Keep exploring
Explore the genus
Collections featuring this plant
Hardy in your zone?
Grow Grand Crinum Lily 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.