What defines a "high grown" coffee?

Altitude is one of the most critical factors in coffee quality. When coffee is grown at high elevations, the cooler air temperatures cause the coffee cherries to ripen much more slowly than they would in the heat of the lowlands. This extended maturation period allows the bean to develop a more complex chemical composition, including higher concentrations of natural sugars and organic acids. These compounds are the precursors to the nuanced flavors we look for in specialty coffee.

Beyond flavor, altitude directly influences the physical structure of the bean. The slower growth rate results in a denser, harder bean. This density is so significant that it is often used as a grading metric in the industry. Denser beans are more resistant to the heat of the roasting process, allowing roasters to apply more energy without scorching the exterior, which helps in developing a balanced and sweet roast profile.

It is important to note that 'high grown' is a relative term. In some countries, 1,000 meters might be considered high, while in others, like Ethiopia or Colombia, coffee might be grown at 2,000 meters or more. The specific threshold for what constitutes 'high grown' varies by region and is often codified in local grading systems. For example, terms like 'Strictly High Grown' (SHG) or 'Strictly Hard Bean' (SHB) are used in Central American countries to denote coffee grown at the highest elevations, signaling a premium product.

In practice, when you see 'high grown' on a label, you can generally expect a coffee with higher acidity, more floral or fruity notes, and a more refined body. While altitude is not the only factor—soil quality, rainfall, and processing are equally important—it is a reliable indicator of potential quality. If you prefer a bright, complex cup, look for coffees grown at higher altitudes; if you prefer something more mellow and chocolatey, you might find that lower-grown coffees suit your palate better.