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Cold Stratification for Bonsai Tree Seeds: Dawn Redwood and Chinese Elm

Stratifying Temperate Tree Seeds

Most deciduous tree seeds need cold to break dormancy. Natural: sow in pot, leave outdoors all winter. Artificial: sow in pot, seal in bag, refrigerate 90 days. Then warm (70–75°F); germination in 2 weeks. Transplant at several true leaves.

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