Readers have brought this to our attention today. From DCRTV:

Jack Eden, who, for two decades, provided gardening tips and hosted "Garden Of Eden" on WTOP radio, died on 1/17. Eden also wrote a gardening column for the Washington Post and the Washington Times. His gardening reports were heard on radio stations across the country. Also, Eden hosted a TV program on gardening in the 1990s. Since 2000, he'd taught consumer horticulture at the College Of William And Mary in Williamsburg. More soon...