Cryptomeria japonica (Japanese cedar) seeds require specific conditions for successful germination. Here are five key tips:

Cold Stratification – Mix seeds with moist sand or a damp paper towel and store in the fridge (1-5°C) for 4-6 weeks to break dormancy.

Well-Draining Soil – Use a light, well-aerated mix with peat, sand, or perlite to prevent waterlogging.

Surface Sowing or Light Covering – Scatter seeds on the soil surface and lightly press them in or cover with a very thin layer (1-2mm) of fine sand or vermiculite.

Consistent Moisture – Keep the soil consistently moist but not soggy. Misting is ideal to prevent washing away seeds.

Warmth & Light – After stratification, provide temperatures of 18-22°C and bright, indirect light. Germination can take several weeks to months.