I'm not sure what you mean by low light, high moisture. Cornus Kousa (kousa dogwood) seed needs to be stratified. Best results will come if given a moist chill of approx 35-40F for 90 days before being brought to warmer (approx 70F) for germination. You can achieve that by sowing the seeds fresh and placing the pots outdoors (protected from rodents if necessary), or placing in a tiny zip lock with a tablespoon or two of moist, sterile medium like damp sand or damp vermiculite, dating the bag, placing it in your refrigerator for about three months. Then you can bring the bag out and sow the contents, vermiculite and all, save the space a pot would take that many weeks in the refrigerator.