What does soft bean mean in coffee grading?

Soft bean is a Central American altitude-based grade designation for coffee grown at relatively low elevations - typically below 1,200 metres above sea level. It sits at the lower end of the altitude grading hierarchy, below Hard Bean (HB) and Strictly Hard Bean (SHB).

Coffee grown at lower altitudes matures faster in warmer temperatures, producing a less dense, more porous bean with softer cellular structure. The resulting cup tends to have lower acidity, simpler flavour development, and lighter body than high-grown equivalents - characteristics more suited to commercial blending than specialty single-origin use.

The terminology comes from the physical hardness of the bean itself: slower-grown, high-altitude beans are denser and literally harder than their lower-grown counterparts. Soft bean, hard bean, and strictly hard bean form a spectrum that directly correlates altitude with density and, broadly, with cup quality potential. For buyers evaluating Central American green coffee, altitude grade is one of the first quality indicators to check - soft bean origin coffees typically fall outside the range considered for specialty use.