not only in tropical,Lemons are produced in a wide range of climates in tropical, subtropical and temperate regions comprising humid, semi-arid or arid conditions. Climate is the most important factor in determining where lemon trees will grow.so I think my opinion can also contribute to the server becoming more developed
https://www.dpi.nsw.gov.au/__data/assets/pdf_file/0009/137709/3-lemon-climatic-requirements.pdf