Variety encyclopedia

SL34

SL34 is a tall-growing Arabica variety characterized by its dark bronze-tipped young leaves and long lateral branches. It is highly valued for its ability to produce a complex, full-bodied cup with pronounced fruit character and vibrant acidity. The variety is well-adapted to high-altitude environments with good rainfall, making it a staple in the Kenyan coffee landscape. While it is susceptible to common coffee diseases like leaf rust and coffee berry disease, its high yield potential and cup quality have kept it in widespread use for decades.

TagsSL34 Arabica SL28 Typica

Where did it come from?

The variety was selected between 1935 and 1939 at the Scott Agricultural Laboratories in Kenya. It originated from a single tree found on the Loresho Estate in Kabete, and while it was historically labeled as French Mission, recent genetic testing indicates it belongs to the Typica genetic group.

What does it tend to taste like?

Deep and sweet — heavy body with less citric edge than SL28, more chocolate and plum.

Plant characteristics

Tall trees with bronze-tipped leaves; adapts to wetter conditions than SL28.

Why producers grow it

Performs in wetter microclimates where SL28 struggles, with a still-excellent cup.

Sources & further reading

Editorial record last reviewed: 2026-09. Sources document specific claims, not guarantees about every coffee sold under this variety name.