Thank you, truth speaker.
There are so many amazing rare sub-tropical fruits you can grow in the Bay area.
experimenting with free seeds out of curiosity can be a good learning experience.
But purchasing tropical tree’s i think is a waste of time and money. Usually shipped in , completely un adapted and go downhill fast. The extreme temperature swings night to day and multiple days of highs in the 40’s and 50’s plus wet is what it is.
Lychee is a million times more cold hardy than cacao. Fairchild near Miami has a mature cacao in zone 11a and even it gets cold damage once or twice a decade when the low is near 40F. The handful of nights below 55F are enough to cause flower drop and fruit abortion in the "winter".
Zone 10 in Florida is also a million (x1000) times more tropical than Bay Area zone 10, it's not "just drier"...the difference is night and day in temperature and overall weather pattern. Equating Florida zones with California zones is 100% wrong and will just cause you heartbreak. Bay Area obviously has nothing to do with warm beaches lined with coconuts. No parallel whatsoever!