On March 23, 2010, Principal Investigator Soo-Hyung Kim, Ph.D, Master of Environmental Horticulture Candidate Allison McCarthy, Washington Park Arboretum (WPA) Horticulture Staff Supervisor David Zuckerman, Center for Urban Horticulture (CUH) Gardener Annie Bilotta and WPA Education Supervisor Patrick Mulligan planted a Climate Change Garden at the CUH. It includes cloned plants of eight species, each collected from four USDA hardiness zones.
View more photos of planting day.
Climate Change Gardens are replicated in a range of climatic conditions, yet they maintain standard growing conditions and eliminate the confounding effects of genetic variance with the use of clones. Plants in these gardens therefore act like a network of climate sensors or “phytometers.”
Plant responses to the different climates of participating gardens will allow inferences about how the species might respond to future climate change. For example, how will zone 5 plants respond if the climate becomes more like zone 7? The species selected are long-lived species that exhibit a variety of breeding systems and wide geographic ranges, which allow them to be planted in different climates across the country. They have flowering times that are initiated by temperature, are easy to clone, and are attractive in a garden setting. Each species will be represented by four ecotypes from each of the USDA hardiness zones 4, 5, 6, and 7. The Climate Change Garden offers a methodology for citizen scientists to explore the implications of climate change for plants.
Plant species to be monitored:
- Aster novae-angliae, New England aster, blooms August- September
- Baptisia australis, blue wild false indigo, blooms May-June
- Monarda fistulosa, wild bergamot or bee balm, blooms July-September
- Panicum virgatum, switchgrass, blooms July-February
- Penstemon digitalis, beardtongue, blooms April-June
- Physostegia virginiana, obedient plant, blooms June to September
- Schizachrium scoparium, little bluestem, blooms August-February
- Syringa rothomagensis, Chinese lilac, blooms late May- July
Text by Allison McCarthy. Photos by Jennifer Youngman.
Top left: Annie Bilotta and David Zuckerman plant Syringa rothomagensis. Top right: Soo-Hyung Kim plants Monarda fistulosa. Bottom: Allison McCarthy lays out the plants for planting.