One of Ponce de Leon’s ambitions was to grow fruit in Florida that His Majesty, the Emperor Charles V of Spain, might be served therewith, and when he embarked upon his voyage to colonize Florida he carried seeds of all kinds for planting. Probably the orange was included and possibly on the shore of Charlotte Harbor the first orange tree in Florida grew in 1521; or perhaps Narvaez or DeSoto included oranges in his commissariat and left seed here to germinate into trees? These are interesting thoughts; but we turn from speculation to historical record for the following account
Davis, T. Frederick
"Early Orange Culture in Florida and the Epocal Cold of 1835,"
Florida Historical Quarterly: Vol. 15
, Article 4.
Available at: https://stars.library.ucf.edu/fhq/vol15/iss4/4