Kalmia latifolia (Mountain Laurel)

Seed Treatment (Stratification)

  1. Cold Stratification Required

    • Mix seeds with moist sand or peat.

    • Place in a sealed plastic bag and store in the refrigerator at 34–40°F (1–4°C) for 4–6 weeks.

    • Check periodically to ensure the medium remains slightly damp but not wet.

Sowing Instructions

  1. Best Time to Sow – After stratification, in early spring or fall.

  2. Soil Requirements – Use a well-draining, acidic soil mix (peat-based or a mix of sand and loam).

  3. Sowing Depth – Do not cover the seeds; they need light to germinate. Simply press them gently onto the soil surface.

  4. Moisture & Humidity – Keep soil consistently moist but not waterlogged. A humidity dome or plastic wrap can help retain moisture.

  5. Temperature for Germination – Ideal range is 65–75°F (18–24°C).

  6. Germination Time – 1 to 3 months, though it can sometimes take longer.

Care After Germination

  • Once seedlings emerge, gradually expose them to more light and remove humidity covers.

  • Transplant when they have at least two sets of true leaves into individual pots with acidic, well-draining soil.

  • When mature enough, plant in a partially shaded location with good air circulation outdoors.

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