Species
Lobelia erinusEdging Lobelia10 other cultivars
‘Laguna Dark Blue’Laguna Dark Blue Lobelia
‘Starship Scarlet Bronze Leaf’Starship Scarlet Lobelia
‘Starship Rose’Starship Rose Cardinal Flower
‘Monsoon’Monsoon Lobelia
‘Dark Blue’Dark Blue Trailing Lobelia
‘Fountain White’Fountain White Lobelia
‘Fountain Rose’Edging Lobelia, Trailing Lobelia
‘Fountain Blue’Fountain Blue Lobelia
‘Laguna Cloud White’Laguna Cloud White Lobelia
‘Laguna Sky Blue’Laguna Sky Blue Lobelia
The Story
Plant Bio
A compact and prolific bloomer, ideal for hanging baskets and containers.
The 'Scarlet Princess' cultivar features vivid red flowers that create a striking display.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Annual
Height
6 inches
Width
12 inches
Light
Full Sun, Partial Sun
Zones
9, 10
Water
Consistently moist soil
Humidity
Prefers moderate humidity
Lifespan
Annual
Native To
South Africa
Toxicity
Toxic to pets if ingested
Planting
How to Grow
- Tuck seeds lightly into moist soil in early spring for best germination.
- Mist cuttings regularly to maintain humidity during rooting.
- Transplant seedlings when they have two sets of true leaves, about 6 weeks after germination.
- Provide full sun for vigorous flowering and compact growth.
- Water consistently, keeping soil moist but not waterlogged.
- Deadhead spent flowers to encourage continuous blooming.
Pro Tip
Use well-draining soil and avoid overwatering to prevent root rot.
Keep It Thriving
Care Guide
Do
- Water regularly, especially in dry conditions 🌱
- Pinch back leggy stems to encourage bushier growth
- Apply a balanced fertilizer monthly during the growing season
Don't
- Avoid overwatering which can cause root rot ❌
- Don’t let soil dry out completely during hot weather
- Refrain from fertilizing in late fall to prevent unnecessary growth
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Plant | ||||||||||||
| Propagate | ||||||||||||
| 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
Scarlet Princess Edging Lobelia questions
What zones can Scarlet Princess Edging Lobelia grow in?
Scarlet Princess Edging Lobelia 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 Scarlet Princess Edging Lobelia deer resistant?
Yes — Scarlet Princess Edging Lobelia is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Scarlet Princess Edging Lobelia bloom?
Scarlet Princess Edging Lobelia typically blooms in 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 Scarlet Princess Edging Lobelia need full sun?
Scarlet Princess Edging 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 Scarlet Princess Edging 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.