Coffee doesn’t start in the roaster.
It starts much earlier.
What we taste in the cup is shaped across a series of stages —
each one setting conditions for what comes next.
No single step defines the outcome.
What you taste is the result of all of them combined.
Cultivation
On the farm
Growing the coffee plant
Coffee begins as a seed planted in a nursery, then transplanted to the farm. The plant takes 3–4 years to produce its first crop of cherries. Everything at this stage shapes what’s possible later.
- Variety selection — Arabica vs Robusta, and cultivars like Bourbon, Gesha, Typica
- Altitude and climate — higher altitude slows development and can increase complexity
- Soil composition and shade — influence nutrient uptake and cherry structure
- Irrigation and fertilisation — affect consistency and yield
The roaster has zero control over this stage — but it sets the ceiling on what the coffee can become.
Harvesting
On the farm
Picking the cherries
Coffee cherries are harvested once ripe. How they are picked has a direct impact on quality and consistency.
- Strip picking — fast, but includes unripe and overripe fruit
- Mechanical harvesting — efficient but less selective
- Selective hand picking — highest quality potential, most labour intensive
- Sorting at collection — removing damaged or underripe cherries
Selective picking is one of the reasons specialty coffee costs more — it reduces variability before processing even begins.
Processing
Post-harvest
Removing the fruit from the seed
The coffee seed sits inside the cherry, surrounded by fruit and mucilage. Processing determines how that is removed — and has a major impact on flavour.
- Washed — clean, structured, often more clarity
- Natural — dried with the fruit intact, often more body and sweetness
- Honey — partial mucilage left on during drying
- Anaerobic / experimental — controlled environments, often more distinctive profiles
- Decaf — caffeine removed through water, CO₂, or solvent processes
Processing is one of the biggest reasons two coffees from the same farm can taste completely different.
Milling & Grading
Post-harvest
Preparing green coffee for export
After drying, the coffee is stabilised and sorted before export.
- Hulling — removing the parchment layer
- Density sorting — separating lower-quality beans
- Screen sizing — grouping beans by size
- Optical or hand sorting — removing defects
- Moisture control — typically stabilised around 10–12%
Inconsistency here shows up later as uneven roasting and unpredictable results.
Import & Storage
Supply chain
Moving coffee to the roaster
Coffee travels from origin to importer to roaster, often over weeks or months.
- Storage method — jute, GrainPro, or vacuum
- Shipping conditions — temperature and humidity matter
- Warehouse handling — turnover and environmental control
- Crop age — newer and older coffees behave differently
This is why the same coffee can behave differently across seasons — even when everything else appears the same.
Roasting
Transformation
Applying heat to develop flavour
Green coffee is transformed through heat into something we can brew.
- Drying phase — moisture driven off, green to yellow
- Maillard reactions — structure, aroma, and colour develop
- First crack — pressure release as gases build
- Development — influences body, sweetness, and balance
- Drop and cooling — determines final roast level
- Weight loss — a useful reference for structural outcome
Every decision here influences the cup — within the limits set earlier in the chain.
Resting
Transformation
Degassing before brewing
Fresh coffee changes after roasting and needs time before it performs well.
- CO₂ release is highest in the first 24–48 hours
- Espresso often benefits from 5–10 days rest
- Filter coffees can peak later
- Over-resting leads to staling
Tasting too early is one of the most common reasons a good roast feels underwhelming.
Grinding
Brewing
Particle size determines extraction
Grind size controls how water interacts with the coffee.
- Coarser — slower extraction, lighter body
- Finer — faster extraction, more intensity
- Consistency — affects evenness of extraction
- Fresh grinding — preserves volatile compounds
A weak or unbalanced cup is often a grind issue, not a roast issue.
Brewing
Brewing
Extracting flavour into water
Brewing is where soluble compounds are extracted into the cup.
- Water temperature — typically 90–96°C
- Water quality — mineral composition matters
- Brew ratio — affects strength and balance
- Contact time — interacts with grind size
- Method — espresso, pour-over, immersion
Brewing is where many perceived “roast problems” are actually resolved.
The Cup
Experience
Everything arrives here
What you taste is the accumulated result of every stage.
- Body — influenced by roast and brew
- Acidity — shaped by origin and processing
- Sweetness — easily lost through poor development
- Finish — clarity and length
- Balance — often the hardest thing to achieve
What you taste is not created in one place.
It is the result of conditions being set… across every stage that came before.
This page sits alongside the Notes and the Guide.
The Notes record what happened.
The Guide captures what has stopped changing.
This page is the wider system those sit within.
One roast at a time.