Species
Lobelia erinusEdging Lobelia10 other cultivars
‘Laguna Dark Blue’Laguna Dark Blue Lobelia
‘Starship Scarlet Bronze Leaf’Starship Scarlet Lobelia
‘Monsoon’Monsoon Lobelia
‘Dark Blue’Dark Blue Trailing Lobelia
‘Starship Rose’Starship Rose Cardinal Flower
‘Scarlet Princess’Scarlet Princess Edging Lobelia
‘Fountain White’Fountain White Lobelia
‘Fountain Rose’Edging Lobelia, Trailing Lobelia
‘Laguna Cloud White’Laguna Cloud White Lobelia
‘Laguna Sky Blue’Laguna Sky Blue Lobelia
The Story
Plant Bio
Lobelia erinus 'Fountain Blue' is characterized by its cascading growth habit and vibrant blue flowers.
This cultivar is noted for its exceptional trailing ability, making it ideal for containers and hanging baskets.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Annual
Height
6 inches
Width
18 inches
Light
Full Sun, Partial Sun
Zones
10
Water
Consistent moisture
Humidity
Moderate to high
Lifespan
Annual
Native To
South Africa
Toxicity
Toxic if ingested in large quantities.
Planting
How to Grow
- Tuck seeds lightly into moist soil in early spring.
- Mist cuttings regularly to maintain humidity.
- Water consistently to keep soil evenly moist.
- Fertilize monthly with a balanced liquid feed during growing season.
- Pinch back stems to encourage bushier growth.
- Divide clumps every 2-3 years to rejuvenate.
Pro Tip
Use well-draining soil and avoid overwatering to prevent root rot.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist but not soggy 🌱
- Pinch back to promote bushiness
- Apply balanced fertilizer monthly during active growth
Don't
- Overwater to prevent root rot ❌
- Allow soil to dry out completely between waterings ❌
- Use heavy clay soil without amendments ❌
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Pest Check | ||||||||||||
| Plant | ||||||||||||
| Prune |
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
Fountain Blue Lobelia questions
What zones can Fountain Blue Lobelia grow in?
Fountain Blue Lobelia is hardy in USDA Zone 10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Fountain Blue Lobelia deer resistant?
Yes — Fountain Blue Lobelia is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Fountain Blue Lobelia bloom?
Fountain Blue Lobelia typically blooms in late spring to fall through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Fountain Blue Lobelia need full sun?
Fountain Blue Lobelia does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
More Lobelia to compare
Cardinal Flower
Lobelia cardinalis
Lilac Candles Great Blue Lobelia
Lobelia siphilitica 'Lilac Candles'
Fan Cinnabar Rose Lobelia
Lobelia speciosa 'Fan Cinnabar Rose'
Cardinal Flower 'Black Truffle'
Lobelia cardinalis 'Black Truffle'
Hybrid Cardinal Flower
Lobelia speciosa 'Compliment Violet'
Cardinal Flower Deep Rose
Lobelia cardinalis 'Deep Rose'
Keep exploring
Explore the genus
Hardy in your zone?
Grow Fountain Blue Lobelia 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.