Elizabeth Wolkovich
Associate professor of forest and conservation sciences who explains scientific concepts behind bloom timing, including the winter chilling and spring warming 'bucket' model and long-term phenology records.
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Mar 31, 2026 • 13min
Predicting spring bloom is an art and a science
Elizabeth Wolkovich, a forest and conservation scientist who studies bloom timing, explains winter chilling and spring warming models. Matthew Morrison, an arborist with the National Park Service who cares for the National Mall cherries, describes the six stages of blossoming and local management. Aru Nair, reporter and on-site producer, narrates field interviews at the Tidal Basin. They discuss forecasting peak bloom, tracking thousands of trees, and climate-driven shifts.
