There are more than 1,000 species of begonias. These plants are native to India and other tropical countries. Begonias are commonly used as bedding, container and basket plants. They are chosen for their attractive flowers and foliage variety. Begonias are easy to root and propagate. Roots are grown from stem cuttings creating a clone of the parent plant. Begonias are one the few plants that can be rooted in plain tap water.
Wash a clear glass container with hot soapy water. Rinse it with 1 part bleach and 9 parts water to thoroughly clean the container.
Fill the container three-quarters of the way with tap water. Let the water warm up to room temperature in order to be less stressful on the cutting.
Cut a 4- to 6-inch-long end of a vigorous, healthy stem with a clean, sharp knife. Make the cut just below a leaf node.
Strip off any extra leaves on the bottom of the stem cutting. Leave only the top most leaf.
Place the cutting in the water and set it in a bright location out of direct sunlight. Change the water every two to three days to keep it fresh and aerated.
Check for root growth in seven to 14 days. Watch the end of the stem for black slime. If this appears, cut off the end of the stem and try rooting again.
Transfer to an individual pot once roots fill the glass container. Use a rich, moist potting soil for transplanting the new begonia.