The title of Lemon Capital of the World has been give to these places, for growing large amounts of lemons:
South Riverside Land and Water Company now Corona, California. (1887 to 1980s).History Of Riverside County California, By Elmer Wallace Holmes, page 201 Chula Vista, California (1888 to present) seecalifornia.com, Chula Vista, California Lemon Festival Ventura County, California (1938 to present) A Life Of Lemons: Founder Of One Of The World's Largest Citrus Farms' Granddaughter On Pivoting In The Pandemic And Growing Up Farming In Ventura County, KCLU, By Caroline Feraday, October 1, 2021, kclu.org Santa Paula, California (1938 to present) also called Citrus Capital of the World[https://spcity.org/156/About-Us City of Santa Paula, about us' Saticoy, California (1938 to present) Florida Mexico India
Lemons need a minimum temperature of around 7 °C (45 °F), so the list is all places with mild winters.
See also Citrus production Citrus rootstock List of citrus diseases Mother Orange Tree
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