Angel wing begonias are impressive, fast-growing indoor plants with thick juicy-looking stems and big leaves that grow in pairs like angel wings. At maturity, angel wing begonias can grow to heights of 10 feet or more, or they can easily be pruned to maintain a smaller size. With adequate light, angel wing begonias will bloom all winter, with delicate coral or pink blooms that dangle from the plant. Angel wings are easy to root from stem cuttings.
Prepare a pot with a drainage hole ahead of time. Fill the pot with a mixture of half coarse sand and half commercial potting soil. Dampen the potting soil with a spray bottle.
Cut a 3- to 6-inch stem tip from a healthy angel wing begonia, using pruners or a knife with a sharp, clean blade. Remove any leaves from the lower 1/3 to 1/2 of the stem.
Dip the cut end of the begonia stem in powdered rooting hormone. Plant the stem in the potting mixture deep enough that the stem will stand upright.
Cover the pot with a clear plastic bag and close the bag with a rubber band or a twist tie. Place the pot in indirect sunlight in a warm room with temperatures between 70 and 80 degrees F.
Tug a stem to determine if the cutting has rooted after about a month. If the cutting has rooted, you'll feel a slight resistance. If the stem hasn't rooted, continue to check every week.
Remove the plastic bag when the stem has rooted. Allow the roots to grow for another one to two weeks, then transplant the stem into a 6-inch pot filled with commercial potting soil. Keep the plant in bright, indirect light and water the potting soil when it feels dry to the touch.