On our season finale, host Carmen Devito visits Zone 1 of the USDA Plant Hardiness Zone Map, which includes Alaska, and also revisits Zone 13, which includes Puerto Rico.

First, we hear from Peter Johnson and Rusty Foreaker, agronomists with Alaska's Department of Natural Resources Division of Agriculture. After the break, we're joined by Dr. Grizelle González, Project Leader of the Research and Development Unit at the International Institute of Tropical Forestry in Puerto Rico.

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