How to Split a Dieffenbachia Plant

Cut a 4-inch section from the main stem with garden shears. Choose a section that contains a growth bud for a new leaf.

Fill half of a 5-inch garden pot with peat moss and fill the remainder of the pot with coarse sand or perlite. Mix the peat moss and the sand or perlite together. Add water to moisten the mixture in the pot.

Lay the section of Dieffenbachia horizontally on top of the mixture in the garden pot. Ensure the growth bud faces up.

Bend a length of coat hanger wire into a U-shape and stick it into the garden pot. Place a plastic bag over the garden pot containing the section of Dieffenbachia, letting the coat hanger support the plastic bag. Secure the bottom of the plastic bag to the garden pot with a rubber band.

Place the section of Dieffenbachia in bright sunlight for four to six weeks until the section roots. Remove the bag from the new plant and water it to keep the mixture in the pot moist. Apply liquid fertilizer every two weeks until the 5-inch plant pot fills with roots from the cut section.

Move the new Dieffenbachia plant to an 8-inch planter filled with potting soil. Cover the newly rooted section with soil and treat the Dieffenbachia as a mature plant.