The cryptomeria, or Japanese cedar, is an evergreen tree that's native to Japan. It can grow up to 50 feet high and 20 feet wide. It's easy to propagate by rooting 2- to 6-inch cuttings taken in the late summer or fall. It thrives in any type of soil as long as it's not soggy, and should be fed every two weeks from spring to fall. It is hardy to USDA zones 6 through 9.
Make a mixture of 90 percent perlite and 10 percent sand. Add it to the planting pot to within 1/2 inch of the rim. Water the soil well, stirring to make sure all the soil is wet. Allow the water to drain from the bottom of the pot.
Remove the leaves from the lower third of the cutting.
Insert the cut end of the cutting into the rooting hormone. Tap on the side of the container to remove any excess.
Insert the bottom third of the stem into the soil and tamp around the base to ensure that it is in good contact with the soil.
Cover the pot with the plastic bag and seal it. Place the bagged pot on the heating mat, set at 75 degrees F, in an area that gets indirect sunlight.
Remove the bag every other day to mist the cutting and check that the soil hasn't dried out. Your cutting should root within two to three weeks, at which time you can remove the bag.