Every cup starts as a decision, not an accident.
Post-harvest processing alone accounts for 57.6% of what lands in your cup — more than farm environment, more than roast. We trace that decision back to the lot, the altitude and the ferment, then hand you the brew method that lets it show.
GRADE
Kirinyaga Highland Reserve
- Altitude
- 1,780 m a.s.l.
- Soil
- Volcanic, pH 6.1
- Process
- Washed, 48h ferment
- Aspect
- East-facing slope
- Best brew
- Paper filter
- Cup profile
- Bright, citric, clean
Altitude sets the ceiling for what any process can achieve
Cooler, slower ripening at elevation lets cherries build sugars, chlorogenic acids and trigonelline before harvest. Ethiopian trial data found that soil temperature and chemistry alone explained 72.3% of the variation in cup quality — which is why every Rustic Garden lot lists its elevation before its flavour notes.
of cup-quality variation traced to soil temperature and chemistry in high-altitude Ethiopian trials — cool, elevated ground consistently outscored warm lowland sites.
Slope orientation matters. East-facing plots in Costa Rican terroir studies showed stronger acidity development from earlier morning sun — a detail we log for every reserve lot.
Breeding takes decades. A new disease-resistant variety needs roughly 25 years from cross to farmer adoption, so the highland trees we buy from today were planted with tomorrow's climate in mind.
Choose your process, choose your cup
Processing method is the single strongest lever on flavour — it decides which acids, sugars and aromatics survive into the bag. Pick the profile you want, and we'll point you to the lot built for it.
Washed
Pulp fully removed, fermented 24–72 hours, then washed. Chlorogenic and malic acid dominate, giving the clarity and acidity classic single-origin drinkers chase.
Shop washed lots →Natural
Whole cherry dried in the sun. Fructose and GABA carry through for a full-bodied, jammy sweetness with almost no acidity to cut it.
Shop natural lots →Honey
Skin off, mucilage on during drying. Extended 240-hour ferments measured 15% sweeter, more consistent cups — and use roughly a tenth of the water washing does.
Shop honey lots →Anaerobic
Sealed, oxygen-free fermentation drives lactic acid accumulation for an intense, wine-like cup unlike anything strip-picked coffee can produce.
Shop anaerobic lots →The brew method decides what leaves the cup — and what stays in it
The same bean, brewed four ways, delivers four different bodies of compounds. Match the method to what you actually want out of your coffee, including your lipid profile.
Paper filter (V60 / Chemex)
Clarity above all. Paper traps almost all the oil-bound diterpenes, leaving single-origin character front and centre.
- Burr grinder, medium grind
- Gooseneck kettle, 91–94°C
- Ratio 1:15–1:18
French press / plunger
Metal mesh lets oils and fines through for full body and mouthfeel — richer, heavier, more textured than any paper method.
- Coarse grind
- 4-minute steep
- Ratio 1:12–1:15
Espresso
90–95°C, ~9 bar, 25–30 seconds. Forced emulsification concentrates flavour and crema — moderate oil carryover, maximum intensity.
- Fine grind, PID-controlled boiler
- 18–20g dose, 1:2 yield
Cold brew
12–18 hour room-temp or fridge steep. Lower extraction, naturally sweeter, gentler on delicate esters — a good afternoon option.
- Coarse grind, 1:8 ratio
- Steep, then filter
We built our house dripper around a peer-reviewed filter-cup study
Researchers compared a standard commercial cone against two purpose-built ceramic drippers, holding beans, grind, dose and pour identical. Only the groove geometry changed.
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What changed
The winning design used eight alternating long-and-short grooves that hold the paper filter tight against the ceramic wall, instead of the loose spiral ridge found in a standard commercial cone.
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Why it mattered
A snug paper seal lets air vent evenly and water spread in a stable front — no channelling, no dry pockets of grounds, no clogged fines at the base.
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What it produced
Higher caffeine, chlorogenic acid, trigonelline, total phenolics, total flavonoids and antioxidant activity (DPPH & ABTS) than the commercial control — plus more consistent flow, even across different people pouring.
| Measure | Ridged design (best) | Grooved design | Standard cone |
|---|---|---|---|
| Caffeine | Highest | Middle | Lowest |
| Chlorogenic acid | 263 ppm | 263 ppm | Lower |
| Trigonelline | 605 ppm | Lower | Lower |
| Total phenolics | 800 µg GAE/mL | Lower | Lower |
| Total flavonoids | 840 µg CE/mL | 700 µg CE/mL | Lowest |
| DPPH antioxidant | 1264.9 µg ACE/mL | Similar | Lower |
Numbers sit well inside published ranges for filter coffee (caffeine roughly 360–1580 ppm, chlorogenic acid 150–470 ppm). The researchers were careful to note that lab chemistry isn't the same as taste — enjoyment still comes down to your own palate, which is why we back every dripper with a fit-your-taste guarantee.
Shop the house dripperBeyond the bean: cascara, silverskin & grounds
Every stage of processing throws off a by-product that specialty research is turning into its own category. We bottle and bag the ones worth keeping.
Cascara (cherry tea)
Dried cherry husk steeped 4–6 minutes at 70–80°C. Tastes closer to hibiscus or tamarind than coffee — a bright, low-caffeine afternoon option.
Shop cascara →Silverskin
The papery skin lost in roasting, milled into baked goods for fibre and polyphenols without changing the taste of the bake.
Shop silverskin →Spent grounds
Nitrogen-mild, pH-neutral once brewed — a genuinely good compost activator, not the soil acidifier folklore claims.
Shop compost bundles →The right cup depends on more than taste
Coffee's cardiometabolic upside — lower cardiovascular, type 2 diabetes and neurodegenerative disease risk at moderate intake — holds up across age, sex and geography. But a few personal variables still change what "moderate" and "right" mean for you.
CYP1A2 genetics set how fast you clear caffeine. Fast metabolisers tolerate more without cardiovascular strain; slow metabolisers may see blood pressure or LDL effects at the same dose.
The cortisol window. Waiting 60–90 minutes after waking, once natural cortisol has peaked and begun to fall, gets more net alertness out of the same cup.
A 2pm cup is still active at 9pm for most people. If sleep is sensitive, switch to cascara or a low-dose filter brew after early afternoon.
Guidance holds at under 200mg/day of caffeine, with many clinicians recommending decaf through the first trimester.
Not sure where to start?
Answer four questions on your palate, brew gear and how sensitive you are to caffeine — we'll match you to an origin, process and roast.
Take the two-minute quizIf you brew filter & watch cholesterol
- Origin
- High-altitude washed
- Roast
- Light–medium
- Brew
- Paper filter
- Afternoon
- Cascara