We're live from Zone 8b with a tell-all about the "epistemological quandary" that is the USDA Plant Hardiness Zone Map. What is hardiness? How is it quantifiable? And how useful is the USDA's classification system for gardeners grappling with extreme weather? Listen to find out. 

First up, some tree news -- some of it shady. Last but not least, we get our first-ever call to the Horticulturati Hotline! Thank you Misti from The Garden Path Podcast for your sharing your Big Tree journeys. 

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Mentioned in this episode: 

"History of Plant Hardiness Zone Maps" (Plant Delights Nursery); The American Horticultural Society's Plant Heat-Zone Map; Famous Trees of Texas by Gretchen Riley and Peter D. Smith


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