Gather 10 to 15 oak logs that are between 4 to 6 inches in diameter. Select logs that are not diseased or damaged.
Cut the logs to 40 inches long in the late fall, two or three weeks before the first frost or early spring after the last frost has ended.
Scrub the cut logs with a wire brush to eliminate dirt. Avoid removing the bark.
Drill 1-inch-deep holes that are 3/8 inches round into the log, spacing the holes 6 to 10 inches apart along the log. Make another row 2 to 3 inches from the first row, going vertically down the log.
Place a shiitake spawn into each hole and seal with the soft melted wax included in the grow kit. Repeat for each log.
Set the logs 2 inches apart on cinder blocks on each end. Place in the shade. Direct sunlight can kill the mushrooms.
Maintain moisture by watering the logs with a garden sprinkler twice a month, two to eight hours per session, depending upon rainfall.