Cedar trees start easily from seed but require a 12-hour soaking period in a dish of warm water. After their pre-soak, we recommend that the seeds are placed in the refrigerator, along with some bonsai soil or potting soil, in a sealed ziplock bag. The soil must be kept moist during this time so check the ziplock bag occasionally and mist with water when necessary.
After a 2-3 months, your tree seeds can be placed in paper cups or bonsai pots with a high quality bonsai soil mixture. Sow your seeds approximately 1/4" deep.
Cover the pot with plastic, and put in a warm, bright place (75° to 85° F).Due to their tender nature, seedlings cannot withstand dry conditions.
Plant 3-4 seeds per container and pinch off undesired seedlings after the first set of true leaves appear.