I'm pretty sure the taste of honey has to do with the source of the pollen brought back to the hive
I've also had black mangrove and it was awesome. Got it at a mango orchard near Matlacha, Fla
You'd be surprised how many thousand hives are kept in big cities. I'm a member of the big bee club here in the Great Lakes Icebox. I'd guess there are not less than 500 beekeepers INSIDE the big city and some of them with upwards of 50 hives in each of their several bee yards.
Before we moved we lived in the first ring of suburbs outside the big city and I wasn't aware of anybody in that municipality that was keeping bees other than me. At that location I had three healthy hives on a lot smaller than a fifth of an acre. The bees fly as far as they need to find food and water.
Since we've moved out to the boonies I'm noticing a beekeeper with 10 or so hives every other mile or so and my bees (just one hive this summer) didn't have any trouble making enough honey for themselves and my immediate family
Anyway, it's worth your time to join the local bee club. They tend to be goldmines of the kind of info you need to survive your first few years of beekeeping. You'll also find out who's nearby your intended bee yard. Your only real concern is some gigantic commercial beekeeper within a couple miles of your place, and whether the nearby beekeepers keep their hives disease free - there is some interaction among the colonies out in the fields and they'll occasionally try to check out each others' hives. That's one vector for disease getting into your hives. But that's one of the things you can prevent with proactive disease treatments. They'll cost you a few bucks every year but the treatments are much cheaper than the cost of a single hive of bees you'd otherwise lose to disease.
Got questions? Feel free to ask. I've been on a bee learning binge for four years now. I'm ALMOST good at this