Combine equal parts of vermiculite, perlite and peat moss and pour water over it until it is evenly moist.
Fill a 12-inch planting pot, to within 1 inch of the rim, with the planting medium.
Remove a 6-inch long stem from the Coleus amboinicus with a razor blade or sharp scissors.
Snap off all the leaves with the exception of the top two.
Dip the cut end of the stem into water and then into the rooting hormone. Immediately insert it into the planting medium to within 1/2 inch of the leaves.
Place the cutting in a brightly shaded area. Keep the soil moist at all times. Give the cutting a light tug after three weeks. If it meets with resistance, the Coleus amboinicus has rooted.