Kalm's Lobelia
Lobelia kalmii
Last reviewed: June 2026
Light
part sun
Water
medium
Size
6"–16" H × 4"–8" W
Bloom
Jul, Aug, Sep
Native to
CT, IA, ID, IL and 17 more states
Pollinators
bees, butterflies
Kalm's lobelia is a compact native perennial that produces delicate blue flowers from July through September. This low-growing plant forms small clumps and thrives in partially sunny locations with consistent moisture.
In an HOA neighborhood
Kalm's Lobelia takes more care to keep looking intentional in a front yard. Maintenance level: moderate. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Very small flowers may appear insignificant
- Can look sparse or weedy in formal settings
- Requires consistently moist soil which may create maintenance issues
Wildlife value
The small blue flowers attract native bees and butterflies during the summer blooming period. Its compact size makes it a good pollinator plant for smaller garden spaces.
Common questions
- How much sun does Kalm's Lobelia need?
- Kalm's Lobelia grows best in part sun conditions.
- When does Kalm's Lobelia bloom?
- Kalm's Lobelia blooms in July, August, and September.
- Where is Kalm's Lobelia native?
- Kalm's Lobelia (Lobelia kalmii) is native to CT, IA, ID, IL and 17 more states, per the USDA PLANTS Database and regional native plant society lists.
- What pollinators does Kalm's Lobelia attract?
- Kalm's Lobelia draws bees and butterflies.
- Is Kalm's Lobelia HOA-friendly?
- Kalm's Lobelia takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Kalm's Lobelia? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz