SL28
A Kenyan selection from the 1930s, famous for the blackcurrant intensity and juicy acidity of Kenya's best coffees.
SL28 was selected in the 1930s at Scott Agricultural Laboratories in Kenya (the SL in its name), from a drought-tolerant tree that came from Tanganyika, today's Tanzania. Along with SL34 it became the backbone of Kenya's coffee.
It is prized for intensity: blackcurrant, blackberry, tomato-like savoriness and bright, juicy acidity. The trade-off is that it is vulnerable to coffee berry disease and leaf rust, which is why Kenya later bred resistant varieties like Ruiru 11 and Batian.
- From
- Scott Agricultural Laboratories, Kenya, 1930s
- Known for
- Blackcurrant, blackberry, juicy acidity
- Weakness
- Susceptible to coffee berry disease and leaf rust
- Signature notes
- blackcurrant, hibiscus, blackberry
- Origins
- Kenya (169), Colombia (18), Honduras (14), Costa Rica (12), El Salvador (9), Guatemala (3), Burundi (2), Uganda (2)
- Processes
- Washed (171), Natural (34), Anaerobic (14), Honey (11), Experimental (6), Inoculated (3), Lactic (2), Thermal shock (2)
- Flavors
- Berry (132), Citrus (119), Floral (76), Red fruit (76), Caramel & sugar (62), Stone fruit (61), Tropical (51), Dried fruit (27)
- Elevation
- 1600–1900 m (median 1725 m)
On the bag
- SL
- Scott Agricultural Laboratories, the Kenyan research lab that made the selection.
Roasters that carry it most
- Prodigal (5)
- Flower Child (11)
- Shoebox (13)
In stock
- Tegu · Little Wolf · $21.00
- Ushirika - Washed · Black & White · $26.00
- El Salvador - Finca Los Naranjos - Anaerobic Honey · Presta · $27.00
- Rung'eto Kii - Kenya · Greater Goods · $30.00
- Riakiberu · Flower Child · $26.50
- Kenya Gatuya Muranga Washed(2026) · Shoebox · $20.00
- Ichuga AA · Little Wolf · $20.00
- Kenya Kamwangi AA Washed · Shoebox · $20.00
- Kenya, Tekangu · Methodical · $34.75
- Kenya - Kamwangi - AB · Brandywine · $28.00
- SL34, SL28, Ruiru 11, Batian - Washed - Kii AB · Hydrangea · $23.00
- La Avila SL28 · Bird Rock · $23.00
- Kenya Rianjagi · Temple · $24.00
- Kenya - Rianjagi · Partners · $27.50
- Kenya Kamunyaka AA · Onyx Coffee Lab · $26.00
- Kenya Gachuiro AB · Heart · $35.00
- Thamani · Passenger · $23.25
- Kambarare - Kenya · Tandem · $30.00
- Kenya Gatura AA · Wonderstate · $28.00
- Kenya Mara Estate · Perc · $30.00
- Kenya Nyawira AA · Heart · $39.00
- Guatemala Kape'tenango SL-28 7oz · Intelligentsia · $25.00
- Ivan Gutierrez SL28 - Washed Process - 2025 · Passenger · $48.50
- Karinga AA — Freezer Reserve · Prodigal · $32.00
- Kenya Kiangoi AA · Intelligentsia · $25.00
- SL28 - Anaerobic Natural - Volcan Azul · Hydrangea · $30.00
- Kenya Mungaria · Huckleberry · $25.00
- El Salvador Malacara SL-28 · Intelligentsia · $25.00
- Uganda Sipi Falls Natural · Huckleberry · $25.00
- Kenya Karatu *NEW* · Kuma · $25.00
Past coffees
- [Rested] SL34, SL28, Ruiru 11, Batian - Washed - Karinga AB · Hydrangea · $24.50
- Kenya - Kiangoi - AA · Brandywine · $28.00
- Kenya Gachatha AB Washed(2026) · Shoebox · $20.00
- Muburi AB · Prodigal · $25.00
- Kenya Kiamwangi Natural · Onyx Coffee Lab · $100.00
- COSTA RICA | Cerro San Luis - Finca Espíritu San Luis | SL28 | Anaerobic Honey · Proud Mary
- Prime Reserve · Prodigal · $35.00
- 2026 Kamwangi - Kenya · Sey · $25.00
- KENYA Ruarai AA | Ruiru 11 & SL28 | Washed · Proud Mary
- KENYA Gathaithi PB | Ruiru 11 & SL28 | Washed · Proud Mary
- KENYA | Ruera AA | SL28 & SL34 | Natural · Proud Mary
- Kenya Tegu AB · H&S Coffee Roasters · $44.00
- Gitare AB · Prodigal · $24.00
- Long Miles ‘Funny Bourbon’ - Natural Process - Education Lot - 2025 · Passenger · $30.50
- Kenya Gachatha AB · Onyx Coffee Lab · $30.00
- Kenya Ichuga AA Washed · Shoebox · $20.00
- Kenya Kiangundo AA Washed · Shoebox · $20.00
- Gichatha-ini · Flower Child · $28.00
- Karatu - SL28 Peaberry · Flower Child · $25.00
- Wilton Benitez - Ultrasonic SL28 · Black & White · $40.00
- Guchienda - Washed Process - 2025 · Passenger · $33.25
- Oneska - Washed Process - 2025 · Passenger · $26.25
- Imani · Flower Child · $27.00
- 2026 Ibonia Estate; AB Separation - Kenya · Sey · $24.50
- Benjamin Paz - La Salsa SL28 · Black & White · $40.00
- SL28 - Washed - Jardines del Eden · Hydrangea · $45.00
- 2026 Guchienda Estate; AA Separation - Kenya · Sey · $26.00
- 2026 Ruarai; AA Separation - Kenya · Sey · $25.00
- Archive: Honduras Yojoa SL28 · Verve · $28.00
- Colombia La Riviera SL28 · Onyx Coffee Lab · $62.00
- Kenya Ngomano Washed · Shoebox · $18.00
- SL28 - Washed - Finca Hartmann, Lot 50 · Hydrangea · $45.00
- Gichatha-ini - Experimental Natural · Black & White · $28.00
- Honduras Benjamin Paz SL28 · Onyx Coffee Lab · $32.00
- Kenya Kamavindi Estate PB · Onyx Coffee Lab · $26.00
- Cafe Ticuna SL-28 · Flower Child · $38.00
- Archive: Mexico La Perla · Verve · $23.00
- Nimrod Pineda · Flower Child · $30.00
- Honduras Caballero SL-28 Washed · Shoebox · $20.00
- Kenya Gatuya Washed · Shoebox · $18.00
- SL34, SL28, Ruiru 11, Batian - Washed - Karinga AB · Hydrangea · $24.50
- SL34, SL28, Ruiru 11, Batian - Washed - Gatuya AA · Hydrangea · $23.00
- SL34, SL28, Ruiru 11, Batian - Washed - Gachatha AA · Hydrangea · $23.00
- Finca El Puente SL-28 Variety · Counter Culture · $29.00
- Gititu · Flower Child · $26.50
- Kathakwa · Flower Child · $32.00
- Lica Torres - Natural SL28 · Black & White · $28.00
- Thunguri - Natural - 2024 · Passenger · $25.75
- Kenya Kamagogo AA Washed · Shoebox · $18.00
- Thunguri - Anaerobic Natural · Black & White · $28.00
- Gondo - Peaberry · Black & White · $26.00
- Kenya Gichangi Estate AA · Onyx Coffee Lab · $30.00
- 2025 Anthony Kimani; Kibingo, AA Separation - Kenya · Sey · $27.25
- 2025 Gerald Njagi; Kambarare - PB Separation - Kenya · Sey · $25.75
- Kenya Kirimara AA · Onyx Coffee Lab · $27.00
- Kenya Kibingo Estate · Onyx Coffee Lab · $40.00
- Archive: Edinson Argote SL28 · Perc · $44.00
- Kenya Gachatha Washed · Shoebox · $18.00
- Kenya Kagunyu AB · Onyx Coffee Lab · $27.00
- 2025 Guchienda Estate; AA Separation - Kenya · Sey · $28.50
- KENYA | Thunguri | SL28 & SL34 | Natural · Proud Mary
- KENYA | Imani Farm | SL28 & SL34 | Natural · Proud Mary
- Maguta - CM Jasper · Black & White · $26.00
- Kenya Gititu Washed · Shoebox · $18.00
- Kenya Gitura Washed · Shoebox · $18.00
- Thunguri - Washed Process - 2024 · Passenger · $24.00
- Gatura - Washed Process - 2024 · Passenger · $24.00
- Kambarare - Washed Process - 2024 · Passenger · $24.00
- Emerson Narváez - SL28 · Black & White · $28.00
- Archive: Uganda Nagasire · Perc · $24.00