What the Catalog Is
World Coffee Research (WCR) maintains what has become the coffee industry’s most important single reference for cultivar information: the Variety Catalog. Available online at varieties.worldcoffeeresearch.org, the catalog provides standardized profiles of the major arabica coffee varieties grown commercially around the world, covering their genetic background, agronomic characteristics, disease resistance, recommended growing environments, and cup quality potential.
The catalog exists because coffee variety information has historically been fragmented, inconsistent, and difficult to access. Before WCR consolidated this knowledge, a farmer in Honduras trying to decide whether to plant Parainema or Marsellesa would need to piece together information from national research institute publications (often in different languages), extension agent recommendations (of variable quality), seed supplier marketing materials (of obvious bias), and word-of-mouth from other farmers. The information asymmetry was severe: breeders and researchers had access to trial data and performance comparisons, but the people actually making planting decisions — smallholder farmers investing their livelihoods — often did not.
WCR’s Variety Catalog was created to close that gap. It compiles data from national breeding programs, international variety trials, and peer-reviewed research into a standardized format that allows direct comparison across varieties, making it possible for a non-specialist to evaluate the trade-offs between, say, a high-yielding disease-resistant Sarchimor and a lower-yielding but premium-quality traditional Bourbon.
How the Catalog Is Organized
Each variety profile in the catalog follows a consistent structure. The entry begins with the variety’s name and common synonyms, followed by its genetic background — parent varieties, breeding lineage, and the institution that developed it. The catalog then rates the variety across several key dimensions using a simple visual scale, typically presented as a qualitative rating (low, medium, high, very high) rather than raw numerical data.
The key dimensions include:
Yield potential. How much coffee the variety produces per hectare under good management. This is one of the most important economic factors for farmers, as it directly determines revenue potential. Varieties are compared on a relative scale, with high-yielding cultivars like Catuai and Catimor typically setting the benchmark.
Quality potential. An assessment of the variety’s cup quality ceiling when grown at appropriate altitudes with good agricultural and processing practices. This rating reflects the variety’s potential rather than its average performance, since processing, altitude, and management can dramatically affect any variety’s cup score. Traditional varieties like Bourbon, Typica, and their close mutations typically receive the highest quality potential ratings, while older Catimor and Sarchimor selections are rated lower.
Disease resistance. The catalog rates resistance to coffee leaf rust (CLR), coffee berry disease (CBD), and root-knot nematodes separately, since resistance to one pathogen does not imply resistance to others. Varieties with Timor Hybrid genetics (Catimors, Sarchimors, and their derivatives) generally show strong CLR resistance but variable resistance to other diseases, while traditional varieties like Bourbon and Typica are rated as highly susceptible to CLR.
Plant stature. Whether the variety is compact (dwarf or semi-dwarf) or tall. This affects planting density, harvesting costs, and suitability for mechanical harvesting. Compact varieties like Caturra, Catuai, and most Catimor/Sarchimor selections allow higher planting densities and easier hand-picking than tall-statured varieties like Typica or SL28.
Optimal altitude. The elevation range at which the variety performs best in terms of both yield and quality. This is critical information for farmers, as planting a variety outside its optimal altitude range can result in poor quality (too low) or poor yield (too high or too cold).
Recommended regions. Where the variety has been tested and validated. The catalog notes which countries or regions have evaluated the variety in formal trials, providing farmers with information about whether performance data exists for their specific growing environment.
How to Use the Catalog as a Farmer
For a farmer making a planting or replanting decision, the catalog serves as a first-pass screening tool. The process typically works like this:
First, identify your constraints. What altitude is your farm? What diseases are present in your region? Do you have access to specialty markets, or are you selling into the commodity stream? Can you afford the yield penalty of a lower-producing cultivar if the quality premium compensates? Do you need rust resistance because fungicide applications are too expensive or impractical?
Second, filter the catalog for varieties that match your constraints. If you farm at 1,200 meters in Honduras, have rust on your farm, and sell to specialty buyers, you can quickly narrow the catalog to disease-resistant varieties with good quality potential at that altitude — a list that might include Parainema, Marsellesa, Lempira, and IHCAFE 90, while excluding susceptible varieties like Bourbon and Pacas as well as low-quality-potential varieties like early-generation Catimors.
Third, compare the remaining candidates on the dimensions that matter most to your situation. If maximizing yield is the priority because you need volume to service a loan, the highest-yielding disease-resistant option may be the right choice even if its quality potential is slightly lower. If you have established relationships with specialty buyers willing to pay premiums for cultivar-specific lots, the variety with the highest quality potential may generate more revenue per hectare despite lower yield.
Fourth, validate with local data. The catalog provides general guidance, but coffee performance is highly site-specific. A variety that performs well at 1,400 meters in Costa Rica may behave differently at 1,400 meters in Ethiopia, even if the altitude is the same, due to differences in temperature, rainfall patterns, soil, and management practices. The catalog explicitly notes which regions have formal trial data for each variety, and farmers should give preference to varieties with proven performance in their specific geography.
How to Use the Catalog as a Buyer or Roaster
For green coffee buyers and roasters, the catalog serves a different but equally valuable function: it provides context for evaluating the coffee you are buying or considering.
Understanding a variety’s genetic background helps explain what you taste in the cup. When you cup a Castillo from Colombia that scores 85 and wonder why it tastes different from a Bourbon from the same region at the same altitude, the catalog provides the genetic context — Castillo’s Catimor parentage, its Timor Hybrid ancestry, its different metabolic profile — that explains the flavor divergence. This is not about judging one variety as better or worse but about understanding why coffees taste the way they do.
The catalog also helps buyers assess realistic quality expectations. If a supplier offers a Catimor lot from 900 meters and claims it scores 88, the catalog’s quality potential and altitude ratings provide a reality check — not that the claim is impossible, but that it would be unusual given the variety’s typical performance at that elevation.
For roasters developing educational content or conveying information to consumers, the catalog is an authoritative source for accurate cultivar descriptions that can ground marketing claims in verified science rather than origin mythology.
The International Variety Trial Network
The catalog is not a static document — it is continuously updated as new data emerges from WCR’s International Multilocation Variety Trial (IMLVT), one of the most ambitious agricultural research projects in coffee history. Launched in 2015, the IMLVT planted standardized trial plots of 30-plus coffee varieties across more than 30 sites in over 20 countries, creating for the first time a controlled global dataset on how the same varieties perform under different environmental conditions.
The trial design is rigorous by agricultural standards. Each site contains multiple replications of each variety planted in randomized block designs, with standardized management protocols and data collection methods. Performance data — yield, plant height, canopy diameter, disease incidence, cherry maturation timing, screen size, and cupping scores — is collected over multiple harvest seasons, providing a multi-year picture of variety performance that accounts for the significant year-to-year variation inherent in perennial tree crops.
The IMLVT data is progressively incorporated into the Variety Catalog, strengthening and refining the ratings as more site-years of data become available. For varieties that had previously been evaluated only in their country of origin, the IMLVT provides the first international performance data — answering questions like how a Brazilian Obata performs in Central American conditions, or whether a Kenyan Batian is suited to Colombian growing environments.
Key Recommendations by Region
While the catalog covers dozens of varieties, certain recommendations emerge repeatedly across regions.
Central America (Honduras, Guatemala, Nicaragua, Costa Rica, El Salvador). The catalog highlights Marsellesa and Parainema as strong options for producers needing disease resistance without sacrificing specialty quality. For farmers in higher-altitude regions with reliable specialty market access who can manage rust chemically, traditional Bourbon, Pacas, and Caturra remain recommended for their superior quality potential. Lempira (a Catimor) is recommended for lower altitudes where quality expectations are more moderate and disease pressure is severe.
Colombia. Castillo and its regional selections (Castillo Naranjal, Castillo El Rosario, etc.) dominate the resistant-variety recommendations, as these were specifically bred for Colombian conditions by Cenicafe. Colombia is also a stronghold for Caturra, which remains widely planted despite its rust susceptibility, and specialty farms increasingly grow Gesha, Bourbon, and Typica for premium market segments.
Brazil. The catalog lists Catuai Vermelho and Catuai Amarelo as the yield benchmarks, with Mundo Novo important for traditional regions. Among resistant varieties, Obata, Tupi, and IPR series cultivars from IAPAR are highlighted. Bourbon Amarelo (Yellow Bourbon) and Bourbon Vermelho (Red Bourbon) are recommended for specialty-focused production at appropriate altitudes.
East Africa (Kenya, Rwanda, Burundi, Ethiopia). SL28 and SL34 remain the quality benchmarks for Kenya, with Batian offered as a disease-resistant alternative. Ruiru 11 provides rust resistance but with quality trade-offs. For Rwanda and Burundi, Bourbon (locally known by various names) dominates, with Red Bourbon selections recommended for quality. Ethiopian production is a special case, as the country’s landrace diversity means that formal variety recommendations are less relevant — most Ethiopian coffee comes from genetically diverse “heirloom” populations rather than named cultivars.
Limitations and Caveats
The catalog is an invaluable resource, but it has limitations that users should understand.
First, it covers primarily named, formally released cultivars. The enormous diversity of Ethiopian landraces, wild Coffea species, and informal farmer-selected populations falls outside its scope. This means the catalog represents the commercially available cultivar options but not the full range of genetic diversity available to the coffee industry.
Second, the quality potential ratings are necessarily generalizations. A variety rated as having “medium” quality potential can produce excellent coffee under ideal conditions, and a variety rated as “high” quality potential can produce mediocre coffee with poor management or processing. The ratings indicate tendency, not destiny.
Third, the catalog’s disease resistance ratings reflect current knowledge, which is itself a moving target. Rust pathogen populations evolve, and resistance that is effective today may break down in the future. The catalog periodically updates resistance ratings as new information emerges, but farmers should not treat a “resistant” rating as a permanent guarantee.
Finally, the catalog cannot replace local expertise. Agronomy is inherently local, and the best planting decisions integrate catalog-level information with farm-specific knowledge about soil, microclimate, labor availability, market relationships, and financial constraints. The catalog is a starting point for informed decision-making, not a substitute for it.
Why It Matters
The Variety Catalog matters because planting decisions are among the most consequential and irreversible choices a coffee farmer makes. A new coffee planting takes three to five years to reach full production, and the trees will remain in the ground for 20 to 30 years. Choosing the wrong variety — one that is susceptible to a disease now endemic in the region, or one that cannot produce the quality needed to access premium markets — can lock a farmer into decades of suboptimal returns.
By making variety information accessible, standardized, and evidence-based, the catalog empowers farmers to make these decisions with better data. It does not eliminate risk — no resource can do that in agriculture — but it shifts the decision from guesswork and tradition toward informed analysis. In an industry where the majority of producers are smallholders with limited access to extension services and research publications, that shift can be transformative.
The catalog is freely available online and has been translated into multiple languages. For anyone involved in coffee production, purchasing, roasting, or education, it is the single most important reference document in the cultivar space.