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 World Checklist of Vascular Plants (Kew).

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.

Kalm's Lobelia

Name: Pollinator Patch
Author: Pollinator Patch

Lobelia kalmii

Last reviewed: August 2026

Toxicity unknown

Kalm's Lobelia (Lobelia kalmii) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

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

Before you buy

Your city may pay you to plant this

Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 445 programs across 44 states, each with a link to the provider and the date we last checked it.

Find rebates in your area

Browse plants for this ecoregion

Northwestern Glaciated Plains Northern Glaciated Plains Western Corn Belt Plains Great Plains Northern Forests Northern Lakes and Forests North Central Hardwood Forests Driftless Area Southeastern Wisconsin Till Plains Central Corn Belt Plains Eastern Corn Belt Plains Southern Michigan/Northern Indiana Drift Plains Huron/Erie Lake Plains Northeastern Highlands Northeastern Coastal Zone Northern Allegheny Plateau Ridge and Valley Acadian Plains and Hills Eastern Great Lakes Lowlands

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 World Checklist of Vascular Plants (Kew).
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 World Checklist of Vascular Plants (Kew). 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.

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