This is part of a answer I sent to a request for Blackberry Honey from different parts of the country. If I am misunderstanding the concept of terroir, please let me know!
From a beekeepers perspective, here is my take (I'll publish this on the thread as well):
Honey from the exact same location and collected at the same time of year, year after year, can have wildly fluctuating flavors. Let me give two examples:
1. Wildflower, from my own apiary, when I was closer to Baltimore. The main honey plants were Black Locust, which produces a light honey with a bit of harsh aftertaste, and Tulip Poplar, which produces a dark, strong tasting honey. They bloom one after the other. Usually, the lighter color wins out. However, if it rains during the Black Locust bloom, you will definitely have a darker color - and stronger tasting - honey.
2. Snowberry, from Oregon - In good years, it produces a light, sweet honey, similar to butterscotch. In a drought, the nectar gets concentrated, and the result is a dark, caramel-molasses type honey.
What can be derived from this is, all things being equal, and global warming not being a concern, honey collected from the exact same place under the exact same environmental conditions will be exactly the same every year. This does not occur in practice because the weather is too much of an unknown. It controls not just the quality of the flower and the nectar, but the bee's ability to collect it as well.
Does that mean you can tell what apiary and what year the honey came from? Maybe, but probably not. In the case of a wildflower, there are simply too many variations. How are you to know it came from my apiary, and not my neighbors? Or someone in a similar set of environmental conditions. Example: We sell our Wildflower Honey to people looking for "local honey" for allergies. The botanical makeup in this geographical region is similar from Northern Virginia to Southern Pennsylvania. You know us well enough to know that we do not push a sale, but when people come calling looking for honey that is "within 20 miles of where I live, because that is what my doctor told me to buy", they usually walk away with what we have.
In the case of a single floral source honey - maybe. If you have a good enough tongue, are familiar with a lot of apiaries, are certain that the honey is not blended, and are certain that you are not looking at a conglomeration of honey from a lot of local sites. For example - a beekeeper may pollinate 2-6 different blueberry fields, pull all the honey of, bring it back to his extraction site, and extract it into one large pot. The "large pot" may even be a conglomeration of several beekeepers, operating from several fields.
I'm assuming that you are asking for Florida Blackberry to compare against Oregon Blackberry? Again, keep in mind, there are different variations of berries, fruits, etc. Using Orange Blossom as an example - this includes everything from navals and juice oranges to tangerines and lemons and limes. One beekeeper may pollinate several groves, toss the honey into the same pot, and call in Orange Blossom. I have tasted a remarkable difference in Orange Blossom Honey between California and Florida. By the same token, I have heard California beekeepers comment that Orange Blossom Honey tastes different from different parts of California, and they attribute it to the types of citrus grown.
The concept of terroir is an interesting question, though. I do not think I can help you with the honey on this one, sad to say. The beekeepers I deal with are simply too large. You would need a small beekeeper, preferably one who is pollinating his own farm. You would need to know exactly what the bees where pollinating that year, since rain can vary the plants the bees attend. Quite an undertaking, to control so many aspects.
As for Blackberry Honey in Florida - I am unaware of any fields of blackberries large enough in Florida to produce single floral source Blackberry Honey. Your better bet would be with Orange Blossom (Florida, California and Texas), Blueberry (Maine and New Jersey), Buckwheat (New York and Midwest), or Fireweed (Oregon and Alaska).
And on the topic of Buckwheat - it is the belief among the beekeepers that the variations found in Buckwheat Honey are the results of GM crops vs more "natural" crops. The closer the seed is to the original buckwheat, the darker, thicker, and stronger the honey becomes.
Thinking about it, a number of bee clubs have scholarship money they hand out, you just need to ask. Central Maryland Beekeepers Association, Maryland State Beekeepers Association, USDA Beekeeping lab in Beltsville, MD are but a few. This would be a good project to approach them with a proposal. With the USDA, you might be able to find a college intern who would be willing to help in exchange for publication rights. If you can coordinate a couple sets of beekeepers across the US, you could easily develop a 2-5 year trial, not including brewing and drinking time.
Hope this gives you something to think on. I'll try to post this to GotMead tonight.
Lori Titus
The Bee Folks