Compliment Blue Lobelia
Lobelia x speciosa 'Compliment Blue'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
24 inches
Width
12 inches
Light
Partial Sun, Shade
Zones
4, 5, 6, 7, 8, 9
Water
Moderate
Humidity
Prefers moist, humid environments
Lifespan
Perennial
Native To
North America
Toxicity
Non-toxic to humans and pets
The Story
Plant Bio
Lobelia x speciosa 'Compliment Blue' is a perennial shrub with dense, bushy growth, featuring lance-shaped green leaves and striking spikes of vibrant blue flowers that bloom in summer. This cultivar is renowned for its long-lasting, intense blue flowers and its compact, tidy habit, making it an excellent choice for borders and container planting.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
We couldn't find this plant listed online right now.
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Planting
How to Grow
- Tuck seeds into moist soil in early spring.
- Keep soil consistently moist for best germination.
- Place in partial shade with good airflow.
- Water regularly during dry spells, especially in summer.
- Divide clumps every 2-3 years in early spring.
- Mulch to retain moisture and suppress weeds.
Pro Tip
Ensure soil stays moist and provide partial shade for optimal growth.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist 💧
- Mulch around the base to retain moisture
- Prune back after flowering to promote bushiness
Don't
- Avoid letting soil dry out completely ❌
- Don’t place in full, harsh sun
- Skip overwatering in winter
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Divide | ||||||||||||
| Spring Cleanup | ||||||||||||
| 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
Compliment Blue Lobelia questions
What zones can Compliment Blue Lobelia grow in?
Compliment Blue Lobelia is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Compliment Blue Lobelia deer resistant?
Not reliably. Deer may browse Compliment Blue Lobelia, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Compliment Blue Lobelia bloom?
Compliment Blue Lobelia typically blooms in mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Compliment Blue Lobelia need full sun?
Compliment Blue Lobelia does best in part shade.
More Lobelia to compare
Cardinal Flower
Lobelia cardinalis
Fan Cinnabar Rose Lobelia
Lobelia x speciosa 'Fan Cinnabar Rose'
Hybrid Cardinal Flower
Lobelia x speciosa 'Compliment Violet'
Lilac Candles Great Blue Lobelia
Lobelia siphilitica 'Lilac Candles'
Cardinal Flower Deep Rose
Lobelia cardinalis 'Deep Rose'
Cardinal Flower 'Black Truffle'
Lobelia cardinalis 'Black Truffle'
Keep exploring
Explore the genus
Collections featuring this plant
Grow Compliment 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.
