Light roast, and where it stops working
Underdevelopment has a taste, and it is not 'floral'.
The tell
Underdeveloped coffee tastes of hay, raw peanut, or nothing at all. It also dries the middle of your tongue in a way ripe fruit never does.
The confusion comes from aroma: a grassy cup can smell floral for the first ten seconds and taste hollow for the next thirty.
Light roast does not create quality. It reveals whether there was any.
Where it works
Very light roasts work on high-altitude, high-density lots where there is enough sugar to carry the acidity. On a 700-metre lot they simply taste sour.
A useful rule: the lighter the roast, the more the coffee depends on the farm.
Disclosure: this article contains no affiliate links. Prices and dates checked in October 2026. Our methodology.