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Hardiness: USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F) USDA Zone 9a: to -6.6 °C (20 °F)
On Sep 26, 2009, grrrlgeek from Grayslake, IL (Zone 5a) wrote:
There seems to be some confusion between this, the cultivar group Foeniculum vulgare var. azoricum or Florence Fennel/Finnochio, and common fennel. The azoricums forms a bulbous leaf base that is eaten as a vegetable, while the common fennel, including bronze fennel, does not. Vegetable fennel is a biennial, harvested at the end of it's first year. Herb fennel is generally perennial to zone 4. Please take that into consideration when reading/leaving comments.
I will update next year after I grow some myself. Yummy :)
On Jan 12, 2003, Weezingreens from Seward, AK (Zone 3b) wrote:
Fennel is an annual in my zone 3 Alaskan climate, but I start it from seed every year. The bulbing types seldom reach much size, but I find the leaves to work well as a dried herb. As an ornamental, it adds another texture to the flower garden.
This plant has been said to grow in the following regions:
Huntsville, Alabama Dermott, Arkansas Alameda, California Manhattan Beach, California Merced, California Napa, California Sacramento, California Denver, Colorado Jacksonville, Illinois Oak Park, Indiana Calvert City, Kentucky Rock Hill, Missouri Walnut Grove, Missouri Scotch Plains, New Jersey North Tonawanda, New York Bunker Hill, Oregon Pittsburgh, Pennsylvania Germantown, Tennessee Thompson's Station, Tennessee Round Rock, Texas Navy Yard City, Washington