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In the Philadelphia area (zone 7A), an extreme cold hardiness test on fig tree varieties followed a harsh winter with temperatures dropping to 4°F, 5°F, 6°F, and 7°F on multiple nights, barely rising above 20°F during the day. Fig trees are generally hardy to around 0°F for the hardiest varieties, with 5°F being safer and 10°F ideal for most. Roots are only hardy to about 15°F but are better insulated underground. Lignification—where the tree’s wood hardens to withstand cold—is emphasized as critical, even for hardy varieties like Breba, with winter protection (e.g., mulching, concrete blankets) being essential in zones 5 and 6 to keep roots warm and ensure regrowth if above-ground wood dies. Several fig tree plots showed varied performance across microclimates. In the southern plot, many trees, including Breba, suffered significant damage, with last year’s growth largely dead, possibly due to soil nutrient deficiencies like boron or potassium, which will be tested. However, some trees in the same plot showed no damage, highlighting exceptional hardiness. Varieties like Camuna Small Black (from Italy’s cold Valcamonica region) and Moro de Caneva performed well, with minimal damage and early leafing out by mid-April, suggesting fruiting by August. In contrast, Campaniere trees showed significant dieback, indicating that factors beyond lignification—such as soil conditions, tree age, and prior winter damage—also impact hardiness. Experimentation, proper pruning, and soil management are recommended to maximize hardiness and fruit production in colder zones. For a full list of cold hardy fig varieties check out this blog post: https://www.figboss.com/post/a-hardy-... These performed the best this year: Hardy Chicago Celeste Moro de Caneva Green Michurinska Michurinska 10 Vagabond Black Celeste Hunt LSU Purple LSU Tiger St. Martin Campaniere JH Adriatic Little Ruby Camuna Small Black aka Valcamonica Small Green Constans Kutfeji Black Sefrawi Training methods and winter protection methods for growing fig trees in zones 4, 5 & 6: https://www.figboss.com/post/fig-tree... More on lignification: • The Secret to Cold-Hardy Fig Trees: Lignif... • Growing Fig Trees in Zone 6&7? Lignificati... • This Will Make Your Fig Tree More Cold Har... Looking for fig trees or cuttings? Check out the Fig Boss storefront: https://www.figboss.com/category/all-... For more fig growing tips, check out the Fig Boss blog: https://www.figboss.com/ The Fig Tree Timeline: https://shorturl.at/p5u6q Need help with your fig tree? Contact me: https://www.figboss.com/contact Follow me! Facebook: / rossraddi Instagram: / rossraddi Support My Work! MERCH! - Posters, Mugs, & Shirts: https://fig-boss.creator-spring.com/ Become a Patron: / rossraddi One Time Donations: https://www.paypal.com/paypalme/rossr... The Tools, Fertilizers, and Products I Use to Grow Food: https://www.amazon.com/shop/rossraddi Consulting Services: https://www.figboss.com/consulting Zone 7A - Greater Philadelphia Introduction (0:00): How hardy are fig trees Lignification Importance (2:08): Lignification emphasized for improved cold hardiness Damage Assessment (5:54): Dead wood identified (maroon/red), scratch test described. Evaluating Hardiness of Fig Varieties (7:35):