Germinating Snowball Bush (Viburnum) Seeds

Snowball bush (Viburnum opulus) seeds have complex dormancy requiring multiple warm/cold cycles.

Stratification Protocol

1. Sow barely covered in moist soil.
2. Refrigerate 60 days; then 60 days warm.
3. Repeat 1-week cold / warm cycles until germination.
4. Or sow outdoors in protected spot; may take 2+ years.

Ebay seeds often lack instructions. Cuttings or layering are far more reliable.