Sumseron Opens Pre-Orders for 2026 Kenya SL28 Harvest

Fifteen tonnes of fully washed, sun-dried Kenyan coffee don’t come up for pre-order every day. Sumseron Coffee just opened theirs, and the portfolio reads like a sampler of what makes Kenya’s specialty sector worth watching: SL28 and SL34 from volcanic soils, small estates using regenerative practices, and a women-led cooperative network producing coffees that score 87 to nearly 89 points.

The 2026 harvest lots span five distinct origins across Kenya’s highland coffee regions, each with full traceability — you know the farm, the elevation, the varietal, the processing method.

The Producers

Kaplelgot Coffee Estate sits in Kipkelion West, Kericho County, growing SL28 on volcanic soil at elevations where Kenya’s classic cup profile develops: blackcurrant, citrus, and floral notes. This is the terroir that made Kenyan coffee famous.

Kipkelion Women in Coffee operates in the same Kericho County region. The network trains smallholders in quality-focused production, giving them direct market access that bypasses the traditional auction system’s intermediaries. They cultivate both SL28 and SL34.

Kimama Estate and Cheptais Cooperative work the misty slopes of Mount Elgon in Bungoma County, growing SL28 alongside Batian — the newer varietal bred for disease resistance while keeping Kenya’s signature flavor intensity. Their cups show berry sweetness with tea-like finishes.

Sirwo Coffee Estates in Trans Nzoia County grows SL28 and Ruiru 11 near the Cherangany Hills, using regenerative soil practices that focus on long-term land health over single-season yields. The result: winey acidity and silky body.

West Pokot Cooperative represents an emerging coffee region getting serious investment. Their lots show tropical fruit notes, red florals, and the crisp acidity that specialty buyers look for.

What the Numbers Say

Cupping scores across the portfolio range from 87.25 to 88.75 — solidly in specialty territory, where every point costs money to achieve. All lots undergo full washing and sun-drying on raised beds at elevations between 1,900 and 2,000 meters.

That elevation matters. Higher altitude means slower cherry maturation, denser beans, and more complex flavor development. Combined with Kenya’s volcanic soils and the SL28/SL34 genetics, these conditions produce the structured acidity and fruit-forward profile that makes Kenyan coffee distinctive in a world of softer, sweeter origins.

Why SL28 and SL34 Matter

Scott Agricultural Laboratories developed these varietals in the 1930s specifically for Kenya’s conditions: drought resistance, high altitude performance, and cup quality that stands out on any cupping table. Nearly a century later, SL28 and SL34 remain Kenya’s signature varietals.

They’re not the easiest to grow. Compared to newer disease-resistant varieties, SL28 and SL34 demand more attention and care. But they deliver the blackcurrant and tomato acidity, the layered complexity, the citrus and berry notes that make specialty buyers pay premium prices.

Batian offers a middle path — disease resistance with respectable cup quality — but estates serious about competition scores still lean on the heritage varietals.

Regenerative Practices

Sirwo’s approach points to where Kenyan specialty coffee is heading. Regenerative farming prioritizes soil health through cover cropping, composting, and reduced chemical inputs. The results show up in cup quality over time as healthier soils produce healthier plants and more complex fruit.

For roasters tracking sustainability claims, these lots offer concrete practices to point to — not just certification logos, but specific agricultural methods that customers increasingly want to know about.

The Market Opportunity

Pre-orders let roasters lock in supply before harvest completion. For 2026 Kenyan lots with these scores and this traceability, securing allocation early matters. The global specialty market continues paying premiums for African coffees with distinctive profiles, and Kenya’s production volume — already modest compared to Brazil or Colombia — limits how much high-scoring coffee reaches export.

Fifteen tonnes sounds like a lot until you spread it across roasters in multiple countries, each wanting enough for seasonal single-origin programs and espresso blends that need acidity to cut through milk.

For specialty roasters building direct relationships with origin, Kenya’s auction system has traditionally been a barrier. Pre-order programs like Sumseron’s offer another path — direct access to specific lots from named producers, with pricing agreed before the beans leave the drying beds.