March 11, 2026 "The Elements of Garden Design" with Jenny Rose Carey, former senior director at the Pennsylvania Horticultural Society's Meadowbrook Farm and former director of the Ambler Arboretum. Jenny Rose and her gardens have been featured in the PBS series The Victory Garden as well as in the Wall Street Journal, the Washington Post and the Philadelphia Inquirer. She is the author of A Century of Cultivation, Glorious Shade and The Ultimate Flower Gardener's Guide.

March 5, 2025  Ginny Stibolt, a botanist, educator, and author of several books on Florida gardening as well as Climate-Wise Landscaping: Practical Actions for a Sustainable Future

March 2023  Dr. James Kushlan, scientist and educator; Kirsten Hines, wildlife photographer; and Jodi Farrell, Everglades Foundation

March 2022  Jodi Farrell, “America’s Everglades”

February 2020  Amy Padolf, Fairchild Tropical Botanic Gardens

March 2019  Jamie Hamilton and Terry Hamilton, Surfriders Foundation, “Rise Above Plastics”

February 2018  Howland Blackiston, “The Vanishing Honey Bee”