Description
Kalmia latifolia, commonly called mountain laurel, calico-bush, or spoonwood is a broadleaved evergreen shrub in the heather family, Ericaceae, that is native to the eastern United States. Its range stretches from southern Maine south to northern Florida, and west to Indiana and Louisiana. Mountain laurel is the state flower of Connecticut and Pennsylvania. It is the namesake of Laurel County in Kentucky, the city of Laurel, Mississippi, and the Laurel Highlands in southwestern Pennsylvania.
Germination Guide
🌍 Eastern North America from southern Maine south to northern Florida and west to Indiana and Louisiana
Difficult
Kalmia latifolia, commonly known as mountain laurel, is a broadleaf evergreen shrub native to eastern North America with spectacular pink and white clustered flowers. Seed germination is challenging and requires cold-moist stratification for 60 days at 4°C (39°F), followed by light exposure at 24°C (75°F) for germination to occur. Seeds have complex dormancy mechanisms and germination can take up to 12 weeks but typically occurs within 2-6 weeks under optimal conditions.
Germination
Germination time
Expect germination in
14 – 84 days
Temperature
Min 15°C
Ideal 24°C
Max 24°C
Substrate moisture
💧💧 High
Substrate & Container
Recommended substrate
Peat and sand mixture (2:1) or peat and perlite (2:1), well-draining acidic soil
Recommended container
Seed trays or small pots (2-4 inches)
Growing Tips
Seeds require light for germination—place trays with stratified seeds under grow lights or in bright natural light. After stratification, lightly press seeds onto moist acidic soil surface without covering. Maintain soil moisture consistently but avoid waterlogging. Germination temperature should be 24°C (75°F). Living moss can be used as an alternative growing medium. Seedlings emerge slowly and unevenly; patience is essential. Once seedlings develop two true leaves, transplant to individual pots with acidic, humus-rich soil. Keep seedlings in partial shade indoors during first growing season before hardening off.
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