Juniperus chinensis, commonly known as Chinese juniper, is a variable evergreen conifer native to northeastern Asia. This species requires both warm and cold stratification to overcome dormancy, making it challenging to germinate from seed but highly valued for bonsai cultivation. Germination is typically erratic and prolonged, often occurring over multiple seasons rather than in a single year.
Before sowing
Seed extraction from berry pulp is required. Most junipers, including J. chinensis, require warm stratification followed by cold stratification to overcome dormancy.
Sowing
What to expect
Tips
Sow seed 1/4 inch (6-7 mm) deep, tamp the soil firmly, and mulch the seedbed. Warm stratify at 20°C for 90 days in damp sand or vermiculite, then cold stratify at 3-5°C for 90 days. After cold stratification, bring seeds back to 18-20°C for germination. Germination is erratic, sometimes requiring 2-3 years total. Seedlings need shade for their first year. Alternatively, sow outdoors in spring for germination the following spring. Keep soil consistently moist but never waterlogged. Be patient—juniper seeds have evolved to germinate sporadically over multiple seasons as a survival strategy.
Sources: Sheffield's Seed Company, Mount Royal Seeds, TreeHelp.com, USDA Forest Service Natural Regeneration Information Center, Wikipedia, BonsaiNut Forum, Bonsai Empire Forum
