In order to propagate Boston ivy, one will need clippers, a quart jar, granulated charcoal and filtered water. Fill the jar half full of filtered or distilled water, and then add a teaspoon of granulated charcoal to the jar. The charcoal helps to keep unwanted bacteria from growing in the water.
It is preferable to take cuttings of Boston ivy when the plant is putting on new growth, according to Garden Guides. Take cuttings that are about 6 to 8 inches in length. Make the cut just below the point where a leaf attaches to the stem, called the leaf node. Remove the bottom 2 leaves from the cutting. Place each cutting into the jar of water with the cut end down. Make sure that the remaining leaves on the cutting are above the water so that they do not decay under the water surface.
Garden Guides advises placing the jar of cuttings right next to the windowpane of a sunny, south-facing window. Check the jar daily to add water as needed to maintain the water level. Roots form in 3 to 6 weeks at the leaf nodes. Transplant individual cuttings into pots or the garden when the roots reach about 3 inches.