Species
Delphinium carolinianumCarolina Delphinium1 other cultivar
The Story
Plant Bio
Delphinium carolinianum, known as Bastrop, is a perennial herbaceous plant with upright flowering stems and deeply lobed, bluish-green foliage. It produces tall spikes of delicate, blue to purple flowers that attract pollinators.
This cultivar is distinguished by its compact growth habit and vibrant, showy flower spikes that bloom profusely, making it an excellent choice for border fronts and rock gardens.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Perennial
Height
36 inches
Width
15 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8
Water
Moderate
Humidity
Average
Lifespan
Perennial
Native To
North America
Toxicity
Toxic to humans and pets if ingested
Bloom period
Late spring – Early summer
In flower about 2 months of the year
Planting
How to Grow
- Tuck seeds into moist soil in fall for natural stratification.
- Mist cuttings regularly to maintain humidity and root in 6 weeks.
- Plant in well-drained loam soil enriched with organic matter.
- Position in full sun for optimal flowering.
- Water consistently during dry periods to establish roots.
- Mulch around base to retain moisture and suppress weeds.
Pro Tip
Plant in well-drained soil with full sun for best blooms.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist 🌱
- Apply a balanced fertilizer in early spring
- Stake tall flower spikes to prevent toppling
Don't
- Avoid overwatering to prevent root rot ❌
- Do not cut back after flowering; wait for seed set
- Skip fertilizing in late fall
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Divide | ||||||||||||
| Fertilize | ||||||||||||
| Prune | ||||||||||||
| Spring Cleanup | ||||||||||||
| Stake |
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
Delphinium Bastrop questions
What zones can Delphinium Bastrop grow in?
Delphinium Bastrop is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Delphinium Bastrop deer resistant?
Yes — Delphinium Bastrop is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Delphinium Bastrop bloom?
Delphinium Bastrop 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 Delphinium Bastrop need full sun?
Delphinium Bastrop does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
More Delphinium to compare
Delphinium 'Double Blue'
Delphinium elatum 'Double Blue'
Larkspur
Delphinium elatum 'Magic Fountain Lavender'
Belladonna Delphinium
Delphinium x belladonna 'Dark Blue Dark Bee'
Summer Nights Larkspur
Delphinium elatum 'Summer Nights'
Faust Delphinium
Delphinium elatum 'Faust'
Pacific Giant Delphinium
Delphinium x belladonna 'Pacific Giant'
Keep exploring
Explore the genus
Hardy in your zone?
Grow Delphinium Bastrop 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.