Hybrid Cardinal Flower
Lobelia x speciosa 'Compliment Violet'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
30 inches
Width
18 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8, 9
Water
Requires consistent moisture
Humidity
Prefers high humidity
Lifespan
Perennial
Native To
North America (hybrid)
Toxicity
All parts are toxic if ingested
The Story
Plant Bio
A hybrid perennial known for its tall, upright spikes of vividly colored flowers that rise from a basal rosette of lance-shaped, green leaves. It thrives in moist to wet soils and is a magnet for pollinators. The 'Compliment Violet' cultivar is noted for its intense, deep violet-purple flowers and robust, erect habit. It is a relatively long-lived and reliable performer compared to some other Lobelia hybrids.
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 during active growth.
- Mist cuttings regularly to encourage root development.
- Transplant seedlings when they are 2 inches tall, after last frost.
- Mulch around plants to retain moisture and suppress weeds.
- Fertilize monthly with a balanced water-soluble fertilizer.
Pro Tip
Ensure soil remains moist; mulch helps retain humidity and keep roots cool.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist 🌱
- Prune lightly after flowering to encourage bushiness
- Apply balanced fertilizer monthly
Don't
- Allow soil to dry out completely ❌
- Overfertilize, which can cause leggy growth
- Neglect watering during hot spells
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Divide | ||||||||||||
| Fertilize | ||||||||||||
| Mulch | ||||||||||||
| Pest Check | ||||||||||||
| Spring Cleanup |
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
Hybrid Cardinal Flower questions
What zones can Hybrid Cardinal Flower grow in?
Hybrid Cardinal Flower 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 Hybrid Cardinal Flower deer resistant?
Yes — Hybrid Cardinal Flower is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Hybrid Cardinal Flower bloom?
Hybrid Cardinal Flower typically blooms in mid-summer to early fall through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Hybrid Cardinal Flower need full sun?
Hybrid Cardinal Flower 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
Fan Cinnabar Rose Lobelia
Lobelia x speciosa 'Fan Cinnabar Rose'
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'
Laguna Dark Blue Lobelia
Lobelia erinus 'Laguna Dark Blue'
Keep exploring
Explore the genus
Collections featuring this plant
Grow Hybrid Cardinal Flower 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.
