Growing Norway Spruce from Seed: Stratification and Sources

Understanding Conifer Seed Dormancy

Norway spruce (Picea abies) seeds require cold stratification to break dormancy—a natural adaptation preventing germination before winter. In Los Angeles' mild climate, this must be simulated artificially.

Seed Sources

• Reputable online suppliers (TreeHelp, Sheffield's, etc.)
• Local nurseries may carry seedlings—often easier than seeds
• Collect from mature cones in fall if you have access to trees

Stratification Protocol

1. Plant seeds 1/4 inch deep in moist potting mix in containers
2. Seal containers in plastic bags
3. Refrigerate (not freeze) at 34-40°F for 90 days
4. Move to warm area (65-70°F) for 60 days
5. If no germination, repeat cold period (another 90 days)
6. Germination is often erratic over many months

Alternative: Natural Stratification

Sow seeds outdoors in fall in containers protected from rodents. Natural winter cold provides stratification; germination occurs in spring.

Why Consider a Sapling Instead?

• Instant landscape impact
• Known genetics and form
• Bypasses 3-5 years of slow seedling growth
• Los Angeles nurseries carry climate-adapted stock

Growing Conditions

Norway spruce prefers cool, humid climates. In Southern California, provide afternoon shade, consistent moisture, and acidic soil. Consider native alternatives like California incense cedar for better adaptation.