I'm a Florida native who spent a lot of time on Merritt Island in my youth. My grandmother rented a house there called "Tropic Grove", which had a small orange grove behind it.
We harvested a couple of wild mangos two or three years ago (unfortunately, the tree is no longer fruiting as it is in the embrace of a strangler fig, and because it's on local park property, the strangler won't be removed). We planted the seeds, and one of them grew to almost 30"...but then fell victim to fire ants.
I saw with interest the photos from 2012 of Ensey's groves on Merritt Island. When we were kids they were considered the richest family on the island.
I hope to come to the site often.