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…]

Ethiopia, as the genetic treasure trove of Arabica coffee, has a unique green bean grading system. Unlike Kenya, which grades by bean size, or Blue Mountain, which grades by altitude, Ethiopia primarily classifies grades based on defect rates and cupping scores. This article will systematically sort out the evolution of Ethiopia's old and new grading systems, provide an in-depth analysis of the specific standards for grades G1 through G9, and, using Yirgacheffe as an example, compare the actual differences between washed G1 and G2 in green bean appearance and flavor performance. It will also share Front Street Coffee's brewing parameters and tasting experience to help coffee enthusiasts fully understand the logic of Ethiopian coffee quality grading. [more…]

As an agricultural product, coffee beans' quality is influenced by many factors, so a grading system is needed to standardize quality and provide a purchasing reference for green bean buyers. Grading standards vary across producing regions: some are based on altitude, others on bean size, while Ethiopia uses a combination of defect rate and cupping. This article will provide an in-depth analysis of the meaning of the G1 and G2 grades for Ethiopian Sidamo coffee beans, explore the evolution of its grading system, and, through a comparison of Yirgacheffe G1 and G2—from appearance and roasting to cupping flavor—reveal the practical impact of grade differences on coffee quality. At the same time, Front Street Coffee's brewing recommendations will also provide you with useful reference. [more…]

As an agricultural product, coffee beans vary significantly in quality, which is why grading systems have become an important means of standardizing quality and guiding green bean procurement. However, the grading criteria across global producing regions are not uniform—Central America mostly grades by altitude, Kenya by bean size, while Ethiopia uses defect rates to classify grades. Why does Ethiopia take this unique approach? What substantive differences actually exist between the G1 and G2 grades? This article, from the perspective of Front Street Coffee, sorts out the evolutionary logic of Ethiopia's grading system, and through a visual comparison of Yirgacheffe G1 and G2 green beans, roasting performance, and cupping evaluation, reveals one by one the true meaning behind grade labels, helping coffee enthusiasts view the issue of bean grades more rationally. [more…]

Panama's Hacienda La Esmeralda, with its refined Geisha grading system, has become a model emulated by many coffee estates. This article systematically sorts out the core differences among Hacienda La Esmeralda's three Geisha grades—Red Label, Green Label, and Blue Label—covering cultivation altitude, plot information, and blending models, while also providing an in-depth introduction to the estate's history, plot divisions, roasting recommendations, and brewing parameters. Front Street Coffee recently purchased the 2020 new-crop Blue Label Geisha, and by combining the cupping performance of the Red Label and Green Label, we guide you through a comprehensive understanding of the unique flavors and purchasing points of these three grades. [more…]

Tanzania, one of Africa's Big Three coffee producers, has performed increasingly impressively in the global specialty coffee market in recent years. When buying Tanzanian coffee beans, what exactly do the "AA" and "AB" labels commonly seen on packaging mean? These letters are in fact grade codes for Tanzanian Arabica coffee beans, using a British imperial grading method similar to Kenya's, though the specific standards differ. Tanzanian authorities grade coffee by screen size, assuming that larger size means better quality, and classify beans into multiple grades such as AAA, AA, A, B, PB, C, E, F, AF, and TT. Among these, Grade AA requires mostly 17 to 18 mesh, while Grade AB is a mix of Grades A and B, and no such official grade actually exists. This article will explain in detail the specific mesh requirements and screening standards of each grade, helping coffee lovers decipher the grading code of Tanzanian coffee beans. [more…]

Jamaican Blue Mountain coffee is world-renowned for its unique flavor and strict controls. Jamaican law stipulates that only coffee beans grown in the Blue Mountain region may bear the name "Blue Mountain." High-grade Blue Mountain coffee is divided into three grades—No. 1, No. 2, and No. 3—corresponding respectively to screen size standards of 17–18 mesh and above, 16 mesh, and 15 mesh. The green beans of all three grades must be packed into wooden barrels for export, with the barrel bearing the estate name, importer's abbreviation, and batch information, along with a government-certified green certificate of origin. Understanding these grades and export regulations helps coffee enthusiasts verify authenticity and make informed purchases of genuine Blue Mountain coffee. Front Street Coffee recommends that consumers pay attention to the roast level and packaging format to judge the true quality of the Blue Mountain coffee in their hands. [more…]

Blue Mountain Coffee is globally recognized as a representative of the world's finest coffee, and its grading system is equally worthy of in-depth understanding. Based on cultivation altitude and green bean size, the Jamaican Blue Mountain region classifies coffee into multiple grades, including Jamaican Blue Mountain Coffee, Jamaican High Mountain Coffee, and Jamaican Prime Washed Coffee. Blue Mountain Coffee itself is further subdivided into No. 1, No. 2, No. 3, and other specifications. Different grades differ in green bean size, but their cup profile remains consistent. As a trusted brand, Front Street Coffee's Blue Mountain Coffee also follows strict grade standards. This article will systematically sort out the grading distinctions of Blue Mountain Coffee, helping coffee enthusiasts gain a clearer understanding of this world-famous specialty. [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…]

When purchasing single-origin coffee beans, labels such as G1, AA, and SHB often appear on the packaging. What exactly do these letters and numbers represent? They are actually coffee bean grade symbols established by each origin based on its own conditions. Due to differences in growing environments and varieties, the grading criteria of different countries vary—some look at the number of defective beans, some at green bean size, and others at hardness or altitude. In this article, Front Street Coffee will sort out the grading standards of major producing regions such as Ethiopia, Kenya, Indonesia, Central and South America, and Brazil, helping coffee lovers understand the meaning behind these grades so they can more accurately select high-quality coffee beans that suit their own taste. [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…]

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…]

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…]

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…]

In East African coffee-producing countries, coffee bean names from Tanzania, Uganda, and even Kenya often carry the suffix AA. What exactly does this letter combination mean? It represents the grade classification of green coffee beans. However, grading methods across global coffee origins are not limited to just one type; besides bean size, there are also different standards based on defect rate, growing altitude, and more. This article will take Front Street's perspective to systematically outline the three major green coffee bean grading systems, with a focus on analyzing Kenya's strict size-based grading system—from AA, AB to PB, E, TT, T, and even MH/ML, detailing the specific classification standards for each grade, while also pointing out the obvious limitations of judging quality by size. [more…]

When purchasing Kenyan coffee, you will often see bean names followed by letter designations such as AA or AB—what exactly do they mean? Why does Kenya place such emphasis on these grades? This article will systematically outline Kenya's green bean grading system based on bean size, explaining the specific classification criteria for each grade—AA, AB, C, PB, E, TT, T, and MH/ML—and pointing out the limitations of size-based grading: bean size is not the sole determinant of flavor quality, and growing altitude and environment are equally critical. It will also introduce the flavor characteristics of coffee from Kenyan producing regions, along with Front Street Coffee's recommendations for Kenyan coffee. [more…]

Ethiopia's Yirgacheffe is rightly regarded as a brilliant gem of the specialty coffee world, its delicate floral aromatics and citrus notes captivating countless coffee lovers. Yet coffee beans from the same Yirgacheffe region, when processed by two different methods—washed and natural—reveal entirely distinct flavor profiles. The washed method endows the coffee with bright, lively acidity and a clean mouthfeel, while the natural method brings rich, full-bodied fruit aromas and fermented wine-like notes. This article will dissect the core differences between Front Street Coffee's washed and natural Yirgacheffe products from three dimensions: green bean processing techniques, grading standards, and final cupping flavors, helping readers make more precise judgments when purchasing and tasting. [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…]

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…]

Blue Mountain coffee is hailed as a gem of the coffee world, but did you know that it is actually divided into three grades: No. 1, No. 2, and No. 3? The Jamaican government has strict regulations regarding the origin, grade, packaging, and export of Blue Mountain coffee—only coffee beans grown in the Blue Mountain region can bear the name "Blue Mountain." This article will provide a detailed analysis of the grading standards for Blue Mountain coffee, the secrets of its barrel packaging, the role of the certificate of origin, and how to identify genuinely high-quality Blue Mountain coffee. We will also introduce the recommendation of Blue Mountain No. 1 by the well-known domestic brand Front Street Coffee, helping you make a wise choice when purchasing. Whether you are a seasoned coffee enthusiast or a complete beginner, this article will give you a deeper understanding of Blue Mountain coffee. [more…]