As an agricultural product, coffee beans vary significantly in quality, so a grading system is needed to standardize quality and provide reference for buyers. However, the geographical environments and cultivation models of global producing regions differ enormously, making it impossible to measure them with a unified standard; each region can only adapt to local conditions. Currently, mainstream grading methods fall into three major categories: screen size, altitude/hardness, and defect rate, and many countries combine them or even add cupping to compensate for shortcomings. This article will systematically sort out the logic and representative producing countries of these three grading methods, with a focus on analyzing how Kenya grades solely by bean size, and introduce the grading practices of Colombia, Ethiopia, Jamaica, Indonesia, Brazil, and other countries. Front Street Coffee will also share related brand product information to help coffee enthusiasts understand the meaning behind green bean grades. [more…]

The green coffee bean grading system directly affects roasting results and coffee quality. This article systematically sorts out two mainstream grading methods: distinguishing bean size by screen mesh number, and classifying grades based on growing altitude. It also summarizes the common grading standards and codes of origins such as Kenya, Ethiopia, Colombia, Brazil, Guatemala, El Salvador, Hawaii, Jamaica, and Indonesia. Whether for bulk trade or specialty coffee, understanding these grading rules helps to more accurately judge the characteristics of green beans, and Front Street Coffee also incorporates this knowledge into its daily bean selection and roasting practices. [more…]

When two café owners ask each other about the grade of beans they use, what lies behind the question is a complex set of international coffee grading logic. Brazil's defect-score system, Central America's altitude standards, East Africa's screen sizes—each producing country has developed a completely different quality evaluation system based on its own national conditions. This article will systematically sort out three mainstream grading methods: by origin altitude, by green bean screen size, and by a composite evaluation method combining screen size and defective bean ratio, and will explain in detail Brazil's unique three-tier grading system and its strict cupper culture. Whether you are a newly initiated enthusiast or a seasoned professional, understanding these standards can help you judge coffee quality more accurately and also provide a reference for everyday purchasing. [more…]

Baristas often mention hard beans and soft beans, but these two terms actually do not refer to whether the beans feel hard or soft to the touch—they refer to the density of the coffee beans. The concept of hard beans comes from the Central American coffee grading system, which uses altitude as the standard—the higher the altitude, the lower the growing temperature, the slower the coffee fruit matures, the more flavor compounds it accumulates, and the greater the bean density becomes. Panama, Costa Rica, Guatemala, and other countries generally adopt this logic, while Ethiopia, because its overall altitude is high, is almost entirely made up of extremely hard beans and does not need further subdivision by altitude. Of course, although high-density beans are delicious, they also bring more challenges during grinding and brewing. [more…]

Coffee beans are grown widely across the globe, and the geographical conditions and cultivation methods of each producing region differ significantly, so it is impossible to measure all beans by the same standard. Different countries develop grading systems suited to their own local conditions. At present, the mainstream bases can be grouped into three categories: bean size, growing altitude (bean density/hardness), and defect ratio. However, these three are not mutually exclusive; many origins use multiple methods at once, and even after preliminary grading they supplement this with cupping to compensate for blind spots in the system. This article will break down these three major grading logics one by one and explain the actual meaning of common grade markers such as AA and G1, helping enthusiasts decipher the grade code on the packaging. [more…]

When buying coffee beans, have you ever been baffled by combinations of letters like AA, G1, SHB, and PB? They may seem to follow no pattern at all, but in fact each one represents the green bean grading standard of a different producing country. Why do coffee beans need to be graded? Why is there no unified global standard? This article will take you through the origins of green coffee bean grading, and how producing regions such as Ethiopia, Kenya, the Central American countries, Jamaica, and Brazil classify their beans based on defect rate, bean size, growing altitude, and cup quality. At the same time, we will also explore what these grades actually mean in the roasted coffee market, and recommend several Front Street Coffee beans corresponding to these grades, to help you better understand the cup of coffee in your hands. [more…]

Coffee enthusiasts often ask in the shop exactly what the difference is between Ethiopia's G1 and G2, what Kenya AA actually means, and what Costa Rica's SHB grade signifies. These combinations of letters and numbers actually reflect how each producing country evaluates the quality of green coffee beans. Due to differences in history, trade, climate, and terrain, different origins have developed their own grading systems, with evaluation criteria covering multiple dimensions such as defect percentage, bean size, growing altitude, green bean density, and processing method. This article will systematically sort out the origins of coffee grading and introduce, one by one, the green bean grade standards of representative producing countries such as Ethiopia, Kenya, Colombia, Jamaica, Costa Rica, Panama, Guatemala, El Salvador, Honduras, and Brazil. [more…]

Hacienda La Esmeralda in Panama is renowned for its strict altitude grading and meticulous plot management, and its Geisha brand is divided into different grades such as the auction Red Label, Green Label, and Blue Label. These grades differ in growing altitude, plot source, whether beans are blended, and cup performance, and their prices and flavors diverge accordingly. This article will systematically review Hacienda La Esmeralda's origin background, plot divisions, and the definitions of each grade, and, through Front Street Coffee's roasting and brewing examples, compare the specific expressions of Red Label, Green Label, and Blue Label Geisha in aroma and mouthfeel, helping coffee enthusiasts understand the grading logic and key points for purchasing. [more…]

For more specialty coffee knowledge, please follow our WeChat official account: Front Street Coffee (FrontStreet Coffee). Many friends, while drinking coffee at Front Street, ask our baristas, "What is Yirgacheffe G1 and Yirgacheffe G2?" "What is Kenya AA, AB?" What is Guate... [more…]

Kenyan coffee is renowned worldwide for its bright berry-like acidity and solid body, and its strict grading system together with its unique terroir jointly create high-quality cup performance. This article will systematically sort out the size grading and flavor grading system of Kenyan green beans, and provide an in-depth introduction to the altitude, varieties, and flavor characteristics of six specialty regions: Thika, Kirinyaga, Nyeri, Kiambu, Murang'a, and the western side of Mount Kenya. At the same time, Front Street Coffee will combine its own roasted Kenya Asalia coffee beans to share brewing parameters and technique suggestions, helping coffee lovers gain a more complete understanding of the coffee charm of this East African producing country. [more…]

Hacienda La Esmeralda in Panama is the discoverer and promoter of the Geisha flavor, and its method of finely grading by altitude is regarded as an industry benchmark. This article will systematically review the estate's origin history, its three growing areas, and the grading standards for the Red, Green, and Blue labels, and, through Front Street Coffee's actual brewing and cupping comparisons of Red Label, Green Label, and Blue Label Geisha, present the specific differences among the three grades in roasting curves, dry and wet aromas, entry-level flavors, and pour-over parameters. Whether you want to gain a deeper understanding of the logic behind Geisha grading or hope to find a reference basis for everyday brewing, this article can provide clear and practical answers. [more…]

As the world's largest coffee producer, Brazil's green bean grading system and regional characteristics have always been a focus of attention for coffee enthusiasts. This article will start with the average cultivation altitude and main producing regions of Brazilian coffee, and provide a detailed interpretation of the local complex grading standards, including defect deduction, screen size specifications, and cup profile classification. At the same time, we will also introduce representative producing regions such as Cerrado and Mogiana, and recommend Front Street Coffee's Brazil Queen Estate Yellow Bourbon coffee beans, taking you through a comprehensive understanding of the unique charm of this quintessential neutral coffee-producing country. [more…]

The elevation-based grading system for Geisha pioneered by Panama's Hacienda La Esmeralda divides Geisha coffee beans into different grades such as Auction, Red Label, Green Label, and Blue Label, allowing coffee enthusiasts to choose according to their flavor preferences and budget. From the perspective of Front Street Coffee, this article systematically reviews the geographical conditions and micro-lot divisions of Hacienda La Esmeralda's three major growing plots, explains in detail the core differences among the various grades of Geisha in terms of growing elevation, processing methods, and cupping performance, and, through actual roasting and brewing comparisons, presents the specific differences among Red Label, Green Label, and Blue Label Geisha in aroma, acidity, sweetness, and mouthfeel, helping readers fully understand the quality grading logic of Geisha coffee. [more…]

Hacienda La Esmeralda in Panama is world-renowned for its Geisha variety, and its four major grades—Auction, Red Label, Green Label, and Blue Label—often confuse coffee lovers. From the perspective of Front Street Coffee, this article sorts out the history of Hacienda La Esmeralda and the logic behind its plot divisions, and explains in detail the specific differences among the grades in planting altitude, plot source, processing method, and cupping performance. Through actual roasting curves and brewing comparisons, it presents the flavor trends of Red Label, Green Label, and Blue Label Geisha in floral aroma, fruit acidity, sweetness, and body, helping readers understand how altitude classification and blending models affect the final expression of a cup of Geisha. [more…]

The world of coffee beans is far more complex than that smudge of amber in your cup. From the small white jasmine-like flowers on the branch to the green raw beans in the processing plant, every coffee bean has undergone layer upon layer of selection by climate, altitude, variety, and processing method. There are about sixty coffee-producing countries worldwide, each grading coffee according to whether it is washed, whether the bean shape is flat or round, bean size, cultivation altitude, defect rate, and even taste tests. The two major varieties, Arabica and Robusta, each hold their own in terms of yield and flavor, while new crop, one-year-old, and multi-year-old beans each have their own character. Understanding these specifications and grading standards not only helps enthusiasts decipher the terminology on packaging, but also understand why beans from the same origin can present such a kaleidoscope of flavors. This article will start from basic common knowledge and systematically sort out the grading logic and refining process of coffee beans. [more…]

When selecting coffee beans, you'll often come across labels like Yirgacheffe G2 or Kenya AA. Behind these letters and numbers lies the logic each producing country uses to assess green bean quality. Due to differences in history, trade, climate, and terrain, grading criteria vary widely from country to country—some focus on defect rates, some measure bean size, and others test altitude or hardness—and they cannot be directly compared across origins. Front Street Coffee has compiled the grading systems of representative producing countries including Ethiopia, Kenya, Colombia, Jamaica, Costa Rica, Panama, Guatemala, El Salvador, Honduras, and Brazil to help you understand the ins and outs behind green bean grades. [more…]

Kenyan coffee is renowned for its clean, crisp cup profile and bright fruit acidity, making it one of the most recognizable African beans in the minds of many coffee enthusiasts. Why is Kenyan coffee so acidic? This is inextricably linked to its high-altitude growing environment, volcanic soil, and unique washed processing method. This article will systematically outline the growing conditions and historical context of Kenyan coffee, introduce the ten major producing regions including Nyeri, Murang'a, and Kirinyaga one by one, provide a detailed explanation of the official grading standards such as AA, AB, and PB based on bean size, and analyze the causes of its signature acidity. At the end of the article, Front Street Coffee's pour-over parameters for Kenyan Asaliya are shared for practical reference. [more…]

Hacienda La Esmeralda in Panama is the discoverer and promoter of the Geisha flavor and a representative estate known for its altitude-based grading system. In this article, Front Street Coffee systematically reviews the development history of Hacienda La Esmeralda, the terroir differences among its three major growing plots, and the grading standards for Auction, Red Label, Green Label, and Blue Label Geisha. At the same time, Front Street Coffee also shares the roasting curves, cupping flavors, and pour-over brewing parameters for three grades of Geisha, helping coffee enthusiasts fully understand the quality system and flavor differences of Hacienda La Esmeralda Geisha, so they can find reference points whether choosing beans or brewing. [more…]

Kenyan coffee is renowned for its clean, crisp cup and bright fruity acidity, making it a favorite among many specialty coffee enthusiasts. From the perspective of Front Street Coffee, this article systematically sorts through Kenya's coffee-growing conditions, historical context, distribution of its ten major producing regions, and unique grading system, while also providing an in-depth analysis of the factors behind its flavor. The article also includes Front Street's Kenyan Little Tomato brewing parameters to help readers gain a comprehensive understanding of the appeal of this East African coffee-producing country. [more…]

Costa Rican coffee is world-renowned for its balanced, clean, and mild classic style. Its acidity is bright and lively, often with citrus and berry notes, and an elegant coffee floral aroma can still be detected in the aftertaste, giving off an overall serene Latin countryside vibe. Unlike many producing regions, Costa Rica's grading method does not rely on bean size or defect rate, but directly uses the altitude at which the coffee farm is located as the basis for classification, with a total of seven grades. This article will systematically sort out the specific contents of this grading system, introduce the three most common grades in the current specialty coffee market—SHB, HB, and SH—and, combined with the typical flavor performance of the Tarrazú producing region, recommend Front Street Costa Rica Mozart coffee beans, taking you to gain an in-depth understanding of this coffee country that, although small in output, enjoys an outstanding reputation. [more…]