WILLIAM C. WELCH is professor and AgriLife Extension landscape horticulturist in the Texas A&M System. He has many years of experience with garden clubs and nursery organizations and is a regular contributor to "Southern Living" magazine. On the board of directors of the Southern Garden History Society, he is also an honorary member of the Garden Club of America, which awarded him its distinguished service medal in 2008. He is also the coauthor (with Greg Grant) of "Heirloom Gardening in the South: Yesterday's Plants for Today's Gardens," published in 2011 by Texas A&M University Press.