Open Source Apothecary At Home / The twelve-month course

Unit 1 (January): Foundations and the workbench

Before a single plant: how to tell whether a claim is true, and how to set up so you can tell what worked.

guide

This unit is the one that makes the other eleven worth doing. Without it, twelve months of herb study produces a set of confident beliefs rather than a set of skills.

The four ideas that do the work.

A trial is not a study. The quality of evidence runs from a systematic review of randomised trials down through single trials, observational associations, mechanism, and tradition. Most herbal claims are sold at the mechanism-and-tradition end while being worded as though they were at the top. Learning to place a claim on that ladder is the whole skill.

Publication bias is the reason a search is not enough. Positive trials are more likely to be published, in English, in indexed journals, and a literature composed only of published positive trials can be wrong in aggregate. This is why the handbook grades by published type and why the negative trials are recorded rather than quietly dropped.

Regression to the mean explains most cures. People take a remedy when symptoms are at their worst. Symptoms then improve on their own, and the remedy gets the credit. A remedy that is used only at peak symptoms will always appear to work, which is the single most common reason people believe something ineffective works.

The placebo effect is real and it is not a synonym for imaginary. It changes reported pain and wellbeing measurably. Its existence does not mean a treatment works; it means you cannot tell without a control group.

The practice side of this unit is the workbench: jars, a scale, a thermometer, a drying space, and — most importantly — a label system. Everything made this year will be unidentifiable by March without one.

What the studies found

Growing it

No plants this month. January is for planning and setting up.

Plan the bed while you can see its bones

• Map sun across the day; note where snow lingers, which shows drainage and cold
• Decide where the raised beds go, and where the Mediterranean herbs will get their drainage
• Order seed now: calendula, chamomile, borage, basil, tulsi, dill, fennel
• Order the seeds that need patience: echinacea, valerian, milk thistle, lavender
• Ask around for mint and lemon balm divisions — free, and faster than seed

Test the soil

• A pH test kit is cheap and the answer changes what you plant where
• Acid soils want lime in late winter to be ready for spring
• Note where water stands after rain; that is where nothing Mediterranean goes

Preparation

Set up the workbench

• Jars and lids, amber bottles, strainer, funnel, scale, thermometer, labels
• A drying space that is dark, dry and ventilated — this is the piece most people underestimate
• A dedicated notebook or spreadsheet for the year

Start the label habit now

• Every jar: plant, part, date, place
• Every entry in the notebook: what, when, how, and what happened
• An unlabelled jar in eight months is an unusable jar.

Read before you make

• The five rules on how to read this
• The foundations pages: publication bias, placebo, regression to the mean, dose-response
• The safety pages end to end — before there is anything in the cupboard to be unsafe

Cautions and interactions

• Do not skip this unit. It is the one that determines whether the year produces skill or belief.
• A remedy tried only when symptoms peak will always seem to work. Design a test instead.
• The absence of evidence is not evidence of absence, and it is not evidence of presence either.
• Read the safety pages before the first tincture, not after.

When this is not a self-care problem — get help

• Any certainty you feel about a remedy after one good experience — that is regression to the mean, not evidence.

Related

• The twelve-month course
• How to read this handbook
• Publication bias, and the herbal literature's positive-results problem
• The placebo and nocebo effects, and why a real effect is not the same as a drug effect
• Regression to the mean: why you always feel better
• Build your own box

Sources

1. Stimulation of the wrist acupuncture point PC6 for preventing postoperative nausea and vomiting: a network meta-analysis. The Cochrane database of systematic reviews 2025; doi:10.1002/14651858.CD003281.pub3 PubMed 40938065
2. Herbal medicine for Hashimoto's thyroiditis: A systematic review and network meta-analysis. Journal of ethnopharmacology 2024; doi:10.1016/j.jep.2023.117663 PubMed 38181936
3. Clinical effects of Hibiscus sabdariffa Linn. on obesity treatment: A systematic review and meta-analysis of randomized controlled trials. Complementary therapies in medicine 2024; doi:10.1016/j.ctim.2024.103063 PubMed 38878905
4. Acupuncture combined with Chinese herbal medicine in the treatment of perimenopausal insomnia: A systematic review and meta-analysis. Medicine 2023; doi:10.1097/MD.0000000000035942 PubMed 37960761
5. Curcumin and Curcuma longa Extract in the Treatment of 10 Types of Autoimmune Diseases: A Systematic Review and Meta-Analysis of 31 Randomized Controlled Trials. Frontiers in immunology 2022; doi:10.3390/pharmaceutics13101715 PubMed 35979355