Bog Laurel

Kalmia polifolia

Ericaceae · broadleaf evergreen shrub · native

Last updated April 25, 2026

Quick Facts

Height

2–3 ft

Spread

1-3 ft

Growth Rate

Slow

Light

Part Shade

Soil

Wet Tolerant

Water

Moderate

Hardiness

Zone Zones 4a–8b

Bloom Time

May 1-May 31

Origin

open bogs, swamps

Carnation tortrixModerate

Spring Emergence & Feeding

Stage	Typical Window	What to Look For
New growth flush BBCH 11	Feb 15-Mar 15	Lighter-colored new growth visible at branch tips
Bloom start BBCH 61	May 1-May 31	First open flowers visible; flowers purple
Bloom end / petal fall BBCH 69	May 15-Jun 15	Last petals falling; flower structures fading
Fruit/seed development BBCH 71	Jun 1-Aug 31	Fruit or seed structures forming; fruit color: brown

Data Maturity

Baseline Extension data. Expert review underway.