From Ball Horticultural Spring Trials 2016, the Whopper® Begonia. The Landscape Begonia. Plant this beautiful specimen in partial shade with at least 3 hours of sun. Space 10-14 inches apart and watch it grow 32 inches tall and 22 inches wide. The super-sized plants have extra-large 3-inch flowers: perfect for garden beds and containers. Make sure to plant where Whopper® has room to row, and maintain water and fertilizer throughout the summer for a stunning result.