The Story
Plant Bio
Dudleya brittonii, commonly known as Giant Chalk Dudleya, is a succulent plant native to the cliffs and rocky outcrops of coastal southern California and Baja California.
This species is known for its large, solitary rosette of chalky white leaves, which can reach up to 18 inches across. The powdery coating (farina) is one of the thickest in the genus.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Cactus Succulent
Height
8 inches
Width
18 inches
Light
Full Sun, Partial Sun
Zones
9, 10
Water
Low
Humidity
Low
Lifespan
Decades
Native To
California and Baja California
Toxicity
Non-toxic to humans and pets
Bloom period
Late spring – Early summer
In flower about 2 months of the year
Planting
How to Grow
- Tuck the succulent's rosette into well-draining soil in a sunny spot.
- Mist the soil lightly to avoid overwatering, especially in summer.
- Ensure the plant receives full sun for optimal growth.
- Water sparingly during the dormant period, about once a month.
- Use a cactus or succulent mix for planting for best drainage.
- Protect from frost by bringing indoors or providing cover during winter.
Pro Tip
Use a gritty, mineral-rich soil and avoid overwatering to prevent root rot.
Keep It Thriving
Care Guide
Do
- Provide plenty of sunlight ☀️
- Use well-draining soil to prevent waterlogging
- Water sparingly during dormancy
- Repot when root-bound
- Protect from frost in winter
Don't
- Avoid overwatering, which can cause root rot ❌
- Do not place in shade; it needs full sun
- Don’t use heavy, clay soil that retains water
- Avoid humid environments
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Fertilize | ||||||||||||
| Plant | ||||||||||||
| Propagate | ||||||||||||
| Winter Prep |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Multiply
Propagation Methods
Good to Know
Common Questions
Giant Chalk Dudleya questions
What zones can Giant Chalk Dudleya grow in?
Giant Chalk Dudleya 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 Giant Chalk Dudleya deer resistant?
Yes — Giant Chalk Dudleya is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Giant Chalk Dudleya bloom?
Giant Chalk Dudleya 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 Giant Chalk Dudleya need full sun?
Giant Chalk Dudleya does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Giant Chalk Dudleya drought tolerant?
Yes — once established (usually after the first full season), Giant Chalk Dudleya handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Dudleya to compare
Keep exploring
Explore the genus
Hardy in your zone?
Grow Giant Chalk Dudleya 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.