HEIRLOOM. While today's impatiens, a shade-loving hybrid of African species, was virtually unknown in gardens until after World War II, balsam, which is native to Southeast Asia, was a well-known favorite by 1900. Balsam grows well in both sun and shade, and we recommend areas with some protection from afternoon sun. It sprouts in only 4-5 days and flowers early, growing to be 12-24" tall. The narrow plants hold their blooms close to the central stem. Victorian gardeners removed some leaves to better display the 2" across, perfection pink, camellia-like blossoms.