Keep the cuttings moist, but not wet, and place the planter in a warm, dim spot. Depending on the variety of dieffenbachia plant you own, you should see new roots growing in three to eight weeks.

Rooting Dieffenbachia Plants in Water Simply cut 4-6″ inches long stem sections and remove the leaves. Pour a glass of water and place the dieffenbachia cuttings into it. You can change the water every few days or so. Keep the jar in a bright and warm spot but out of direct sunlight as that can shrivel the plant.

Plants can be rooted and grown in water. Plants grown in soil should not be water logged; Dieffenbachia will not tolerate constant overwatering. A relatively moist atmosphere results in vigorous growth, because its large leaves may dry up in a hot room.

Soil and Fertilizer The dieffenbachia likes well-drained soil, so it’s best to add some sand or perlite to the mixture that you use. I prefer to use an African violet soil mix so that it drains with ease.

If you need to, you can cut the remaining leaves in half, removing the half that is not attached to the stem. Place the rubber tree plant cutting in a warm place that is lit by only indirect light. In two to three weeks, the rubber tree cutting should have developed roots and the covering can be removed.

Dieffenbachia love moisture in the air; more is always better. The goal should be to have a 60 percent humidity level throughout the year. Misting the plant’s leaves is a temporary help, but isn’t enough to keep the humidity levels sufficient.

10 to 14 days
Most softwood rose cuttings will root within 10 to 14 days. To test their progress, tug very gently on the cuttings. You’ll feel a slight resistance as the new roots form and grow into the soil.