Many boomers are experimenting with new careers later in life, and with the push towards sustainability, there's no better area than horticulture. However, the perception among the high school-to-college set is that gardening is still just a hobby, and not a career option.  "Everyone is trying to attract young people to horticulture," said Jenny Rose Carey, director of the arboretum at Temple's Ambler campus, where many of the horticulture and landscape architecture students are middle-aged or career-changers. "So many of our young people are removed from the land, they don't understand our connection to nature."