Begonia is a genus of perennial flowering plants that includes over 1,500 species. Beloved by the home gardener for its ability to bloom in shady areas, the tuberous begonia will flower throughout the summer. Native to South America and southern Africa, the tuberous begonia requires warm temperatures to thrive and will go dormant when the temperature cools. At that time you can dig them up and store them for use the following spring. Plant the tubers outdoors after all danger of frost has passed.
Choose a shady location with well-drained soil in which to plant the begonia tubers. Test the soil in the planting area by watering it until the water puddles. If the puddles remain after six hours, find another planting site.
Place a 3-inch layer of compost on the soil in the begonia bed and mix it with the existing soil to a depth of 6 inches.
Look for the indented side of the tuber. This side should be facing up when the tuber is planted.
Push the begonia tubers into the loose soil and cover them with 3/4 inch of soil. Place the tubers 8 to 12 inches apart.
Water the planting area until the soil is soaked. Keep the soil moist but not soggy. The tubers should sprout within three weeks.