Yarrow Stalk Divination: The Traditional I Ching Method

Before coins, before apps, the I Ching was consulted with fifty yarrow stalks — a method slow enough to feel like ceremony and precise enough to have kept mathematicians busy for a thousand years. This guide covers the complete traditional procedure, what each stage means, how the probabilities differ from the coin method, and whether the extra fifteen minutes are worth it (short answer: sometimes, and here’s when).

Why Yarrow Stalks?

The I Ching itself hints at its origin: “The number of the Great Expansion makes fifty, of which forty-nine are used” — the opening of the Great Commentary (one of the Ten Wings). The stalks — traditionally from the yarrow plant, Achillea millefolium, prized across Eurasia for divination — are counted, divided, and remaindered in a procedure that mirrors the cosmology it consults: unity set apart, the two primal forces splitting, the four seasons measured, the remainder held in the hand like the intercalary month that keeps the calendar true.

Whether or not you find that cosmology persuasive, the design goal is visible: a method too slow for casual use. Fifteen minutes of deliberate manipulation before an answer is, functionally, a filter against idle questions — the ancestral version of “only ask what you’d act on.”

What You Need

• 50 stalks, 35–45 cm long, uniform thickness. Yarrow is traditional; straight bamboo skewers, coffee stirrers, or dry pine needles work identically. What matters is handling ease and visual uniformity.
• A clean, uncluttered table surface.
• Your written question and a notebook.

Source note: genuine yarrow stalk bundles are sold wherever I Ching books are sold, but plant identity matters little. The classic manuals were written for whatever was at hand — the discipline is in the counting, not the botany.

The Procedure for One Line (Three Stages)

First, set one stalk aside — it represents unity, the unchanging, and never participates. The remaining 49 do the work. For each line, three stages:

Stage 1 — Divide

Hold the 49 stalks. Without counting, split them into two bundles, left and right, at random. Take one stalk from the right bundle and set it between the little finger and ring finger of the left hand. (Traditional commentary reads meaning into every step: the split is the two primal forces; the single stalk, the “no-need” one.)

Stage 2 — Count by fours

Count the left bundle in groups of four, setting the groups aside. When fewer than four remain, place that remainder between the ring and middle fingers. Then count the right bundle the same way, placing its remainder between the middle and index fingers.

Stage 3 — Gather the remainder

The stalks now between your fingers — 1 (from stage 1) plus the two remainders — total either 5 or 9. Set them aside. Gather the counted stalks back together: 44 or 40 remain. This completes one “change” (变).

Repeat the whole three-stage procedure twice more on the remaining stalks. The second change leaves 40, 36, or 32; the third leaves 36, 32, 28, or 24. Now divide the final count by 4:

Draw that line at the bottom of your page. Then gather all 49 stalks again and repeat the entire three-stage cycle for the second line — and so on, six lines, bottom to top. A full cast: 18 cycles.

Yarrow vs. Coins: The Probability Question

The yarrow method is not just slow coins. Its probabilities per line, derived by counting all possible divisions:

Two differences matter to connoisseurs: yarrow makes old yang — the powerful, changing “nine” — genuinely rare, which suits the text’s caution about aggressive yang; and it weights the stable yin outcome highest, a certain stillness built into the method. Whether these weights were engineered deliberately or emerged from the procedure is debated — Song-dynasty scholars like Zhu Xi analyzed them painstakingly, and excavated Warring States divination records show yet other distributions in earlier practice.

For everyday practice, either method is legitimate. The honest distinction is experiential: coins answer quickly; yarrow makes you work toward the answer, line by line, for a quarter of an hour.

When the Slow Method Is Worth It

• Consequential, once-a-year questions — the big moves, the decade decisions. The ritual gravity fits the stakes.
• When you can’t stop re-asking. Fifteen minutes per cast is a superb cure for compulsive re-casting.
• Teaching the mechanics. Nothing teaches the changing-line logic like manipulating stalks through 18 cycles.
• Deepening an established practice. Many practitioners reserve yarrow for anniversaries, new years, and crossroads days.

And when it isn’t: daily questions, practice drills, time-pressed consultations. The three-coin method remains the sensible daily workhorse, and a sustainable routine that can include both is sketched in Building an I Ching Daily Practice That Sticks.

Frequently Asked Questions

Do the stalks need to be genuine yarrow?

No. Any 49 uniform sticks work — the counting procedure, not the plant, produces the hexagram. Skewers or stirrers are the practical modern choice; genuine yarrow is a pleasure, not a requirement.

I keep losing count mid-procedure. Any tips?

Two habits fix it: count groups of four with a deliberate rhythm rather than by sight, and always park the finger-held stalks in a fixed spot before starting the next bundle. Slowing down is the method working, not failing.

Can I do fewer than six lines to “speed it up”?

No — a partial cast is no cast. If 15 minutes is too long, use coins; that is what they are for.

Why does the Great Commentary say fifty stalks but forty-nine are used?

The text’s own gloss: the fiftieth represents the unity that never moves — the unused stalk is a standing reminder that the whole procedure operates within something larger. Mathematicians and mystics have added many further readings; the ritual point stands on its own.

Do yarrow readings “work better” than coin readings?

The texts are the same; the difference is in the practitioner. What the method changes is attention, and attention is what you bring to interpretation — the mechanics are covered in How to Read the I Ching, and they apply identically to both methods.

Related: the coin method step by step in The Three-Coin Method; how changing lines are decoded in Understanding Lines and Judgments.