Cut about 5 to 6 inches from the tips of healthy branches, using your sharp pruning knife. The cuttings should be from the current year’s growth. Trim the needles from the bottom half inch of each cutting. For best results, take your cuttings from trees around 10 to 15 years old.
Pour about 4 inches of sand into a flat pan. Add warm water until the sand is thoroughly moist but not sopping wet. Insert cuttings vertically, pushing the bottom about 2 inches into the moist sand. Set cuttings in rows, spaced about 3 inches apart. Space rows about 3 inches apart.
Cover the pan loosely with a clear cover to form a greenhouse. Allow for ventilation. Place the covered pan in a bright area but out of direct sunlight. Keep the sand moist but not sopping wet. Cuttings need a warm, humid atmosphere. Keep temperature between 55 and 75 degrees Fahrenheit and humidity between 50 percent and 90 percent. Cuttings should develop root systems in about 14 weeks.