Colombia Guamo · 36+96h Anaerobic Natural

Sold out — next roast round September 11
86+ Excellence

Caturra · 36+96h Anaerobic Natural · 1,800 m.a.s.l.

CocoaCherryBlueberryGreen apple

The Bayter family came to coffee in 2009 from avocado farming, to keep El Vergel alive after disease took the previous crop. Self-taught, they never stopped experimenting — 28 varietals under trial, and cultured yeasts, bacteria and koji no Colombian farm had brought to coffee before.

Medium body, cocoa-led. The acidity is crisp and apple-like rather than citric; the sweetness sits in dark fruit. Of everything we sell, this is the one that still reads as coffee first.

First time?If you normally drink a supermarket Colombian, this will feel familiar for about two seconds and then go somewhere else. Same cocoa backbone. The fruit is the new part.

Roast
Light
Dark
Expressiveness
Subtle
Expressive

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The lot file

Every variable, named.

Origin
Colombia, Caldas
Producer
Reforest Project · processed at El Vergel Estate
Altitude
1,800 m.a.s.l.
Varietal
Caturra
Process
36+96h Anaerobic Natural
Drying
Mechanical, ~7 days at 22% humidity, then rested 30 days to 10.5%
Arrival cupping
86+Scored by the importer’s QC lab. The scale runs to 100 — 85+ is exceptional.
Harvest
2025–26
Bag
10 oz · 284 g · whole bean

Why this lot

What makes it worth it.

  • Named for a shade tree. The Guamo is planted by Forest Coffee’s Reforest Project so smallholders can keep growing coffee as the climate warms.
  • Smallholder cherry, one central mill. Picked across the project, then processed at El Vergel — where the ferment is held to the hour and the degree.
  • Two sealed stages, 132 hours. A 36-hour pre-ferment on the cherry, then 96 hours in tank.

What goes wrong

A 132-hour ferment is long enough to fail.

Left to run on its own, a 132-hour ferment turns boozy and sharp — the flavour people mean when they call a coffee “over-fermented.”

This one never gets the chance. The entire 96-hour second stage is held at a steady 23 °C, then dried mechanically over about seven days at 22% humidity and rested 30 days. The fruit builds at a rate somebody chose.

How to brew it

Three methods, one roast.

We roast a single omni profile per lot — light-medium, developed to work in a cone, in a press and in a portafilter. Not a compromise between them: one correct roast for the coffee, then a brew method chosen to suit it.

MethodRatioWaterGrindTime
Filter 1:16 198 °F Coarse · 800–1,000 µm ~3:15 (45 s bloom)
Immersion 1:14 190 °F Medium · 600–800 µm ~2:45 (45 s bloom)
Espresso 1:2.5 198 °F Fine · 200–300 µm 28–34 s

Why lower pressure on espresso. A light-medium omni roast pushed at a full 9 bar throws its acidity and its bitterness at you at once. Pull it at 6–7 bar with an extended 8–12 second pre-infusion — wetting the bed evenly before extraction starts softens both ends and lets the fruit through. No pressure control? Grind a little coarser and pull longer: 1:2.5 rather than 1:2.

Sharp, boozy or thin at the finish? Go one step coarser and drop to 190 °F. Flat or hollow? Go finer first, and only then up to 199 °F. Change one thing at a time.

Rest. We rest every roast 5–7 days before it ships, so it arrives ready. These lots keep opening up after that — give a bag ten days off roast before you judge it.

Meet the producer

The hands behind this lot — Reforest Project · processed at El Vergel Estate

Smallholder cherry from Forest Coffee's Reforest Project in Manzanares, Caldas, processed centrally at El Vergel Estate — where the fermentation is held to the hour and the degree. The lot is named for the Guamo, a shade tree the project plants as the climate warms.

RegionColombia, Caldas
Altitude1,800 m.a.s.l.
Process36+96h Anaerobic Natural

Small-batch roasting

Nothing sits on a shelf.

Roast
Light-Medium — Enough development to resolve the cocoa base, while keeping the fruit the fermentation built.
Batch
Small batches on our Mill City drum roaster, sealed the same day.
Shipping
Ships within 48 hours. Free over $50.

How this coffee was made

Natural Guamo

Colombia · Manzanares, Caldas · Caturra · 1,800 m · Reforest Project · processed at El Vergel

Cocoa · Cherry · Blueberry · Green apple

  1. 1
    Selection

    Caturra cherries, renowned for their complex flavour potential, are meticulously selected.

  2. 2
    Pre-ferment · 36 h

    A first 36-hour anaerobic pre-fermentation enhances the development of fruity and tropical notes.

  3. 3
    Sealed · 96 h

    Cherries are fermented for 96 hours in oxygen-free tanks at 23 °C, to build sweetness, acidity and complexity.

  4. 4
    Drying · 7 days

    Dried for 7 days, to reach 22% humidity.

  5. 5
    Rest · 30 days

    Beans are separated and rested for 30 days, to 10.5% moisture, for the flavours to settle.

  6. 6
    Roast

    Selected beans are roasted with precision to unlock their unique flavour characteristics.

Colombia Natural Guamo 36+96h Anaerobic Natural — 10oz box Anaerobic
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Colombia Guamo · 36+96h Anaerobic Natural

Caturra · 36+96h Anaerobic Natural · 1,800 m.a.s.l. · 10 oz