When does Kalmia latifolia bloom?

Calico-bush typically flowers in May and June, producing clusters of cup-shaped blooms at the branch tips.

What pollinators visit Kalmia latifolia flowers?

Bees and butterflies are the main visitors to calico-bush flowers, which have a spring-loaded pollen mechanism that dusts insects as they probe for nectar.

How much sun does Kalmia latifolia need?

It grows best in part shade, though it can adapt to brighter part sun or deeper shade in woodland settings, especially with consistent soil moisture.

How much water does calico-bush need?

It prefers medium, evenly moist soil but can tolerate short dry spells once established, particularly in shadier locations.

Is Kalmia latifolia evergreen?

Yes, it keeps its glossy, leathery leaves year round, which makes it a reliable structural shrub in shaded gardens through winter.

Is Calico-bush toxic to dogs?

Yes. Calico-bush is listed as toxic to dogs by the ASPCA Animal Poison Control Center (aspca.org). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.

Is Calico-bush toxic to cats?

Yes. Calico-bush is listed as toxic to cats by the ASPCA Animal Poison Control Center (aspca.org). If your cat has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.

Is Calico-bush toxic to livestock?

The USDA PLANTS Database does not flag Calico-bush as toxic to livestock.

Is Calico-bush HOA-friendly?

Calico-bush is generally an HOA-friendly choice in the right placement, with low maintenance.

Calico-bush

Name: Pollinator Patch
Author: Pollinator Patch

Kalmia latifolia

Last reviewed: September 2026

Kalmia latifolia, or calico-bush, is an evergreen shrub that blooms in May and June with clusters of pink to white cup-shaped flowers. It grows well in part shade with medium moisture, often in woodland understories along the eastern seaboard and Appalachian slopes.

Calico-bush (Kalmia latifolia) — Photo: (c) Michael J. Papay, some rights reserved (CC BY)

Calico-bush is toxic to dogs and cats.

Listed as toxic by the ASPCA Animal Poison Control Center (opens in new tab) (last reviewed 2026-08-03). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435and your veterinarian's emergency line.

Pollinator Patch flags toxic plants so you can choose a pet-safe native alternative for your yard.

The USDA PLANTS Database (opens in new tab) does not flag Calico-bush as toxic to livestock.

Light

part shade

Water

medium

Size

72"–180" H × 72"–180" W

Bloom

May, Jun

Native to

AL, CT, DE, FL and 20 more states

Pollinators

bees, butterflies

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Browse plants for this ecoregion

Piedmont Northeastern Highlands Northeastern Coastal Zone Northern Allegheny Plateau Erie Drift Plain Northern Forests Middle Atlantic Coastal Plain Northern Piedmont Southeastern Plains Blue Ridge Ridge and Valley Eastern Temperate Forests Central Appalachians Western Allegheny Plateau Interior Plateau Southern Coastal Plain Acadian Plains and Hills Atlantic Coastal Pine Barrens

Mountain laurel is a classic northeastern evergreen shrub that produces clusters of distinctive cup-shaped pink or white flowers in late spring. It forms a dense, rounded bush with glossy dark green leaves year-round and is prized for its formal appearance and reliable blooming.

Growing Calico-bush

Grow Calico-bush in part shade and medium water. Mature plants reach 72 to 180 inches tall and spread 72 to 180 inches wide. Expect low maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

Calico-bush is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.

Works well in: front yard, foundation, street edge, mid zone.

Large mature size requires adequate space planning

Wildlife value

Host plant for azalea sphinx moth.

The flowers attract bees and butterflies during the May-June bloom period. Dense evergreen foliage provides year-round shelter for birds.

Common questions

When does Kalmia latifolia bloom?: Calico-bush typically flowers in May and June, producing clusters of cup-shaped blooms at the branch tips.
What pollinators visit Kalmia latifolia flowers?: Bees and butterflies are the main visitors to calico-bush flowers, which have a spring-loaded pollen mechanism that dusts insects as they probe for nectar.
How much sun does Kalmia latifolia need?: It grows best in part shade, though it can adapt to brighter part sun or deeper shade in woodland settings, especially with consistent soil moisture.
How much water does calico-bush need?: It prefers medium, evenly moist soil but can tolerate short dry spells once established, particularly in shadier locations.
Is Kalmia latifolia evergreen?: Yes, it keeps its glossy, leathery leaves year round, which makes it a reliable structural shrub in shaded gardens through winter.
Is Calico-bush toxic to dogs?: Yes. Calico-bush is listed as toxic to dogs by the ASPCA Animal Poison Control Center (aspca.org). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.
Is Calico-bush toxic to cats?: Yes. Calico-bush is listed as toxic to cats by the ASPCA Animal Poison Control Center (aspca.org). If your cat has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.
Is Calico-bush toxic to livestock?: The USDA PLANTS Database does not flag Calico-bush as toxic to livestock.
Is Calico-bush HOA-friendly?: Calico-bush is generally an HOA-friendly choice in the right placement, with low maintenance.

These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.

Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

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