Pinus nigra subsp. laricio, commonly known as Corsican Pine, is a large Mediterranean evergreen conifer native to Corsica, Sicily, and southern Italy. It exhibits orthodox seed behavior and requires cold stratification to break dormancy. Seeds are moderately vigorous and benefit from careful moisture management during the stratification and germination phases.
Before sowing
Cold stratification in moist medium (vermiculite, peat, or sterile material) for 6 weeks at 4°C in refrigerator. Monitor weekly from week 2-3 onwards. Seeds may germinate during stratification. Remove chitted seeds and sow separately when approximately 10% show radicle emergence.
Sowing
What to expect
Tips
Maintain consistently moist (not waterlogged) substrate throughout pre-treatment and germination. Sow in individual pots to minimize transplant shock. Protect young seedlings from direct sunlight during germination. Seedlings have sparse root systems and should be planted into permanent positions as soon as possible while still very small (5-10 cm). Ensure excellent drainage to prevent damping-off. Do not allow substrate to dry completely during the stratification period. Slugs and snails are pests of young seedlings; provide slug barriers if necessary.
Sources: Forest Research (UK), PFAF Plant Database, Encyclopedia of Living Trees, Journal of Forestry
