Casting guide
Yarrow Stalk Method and Probabilities
The yarrow-stalk method is older, slower, and more weighted than coins. It creates the same four line types, but not with the same probabilities, which gives the reading a different rhythm.
Quick answer
What makes yarrow different
The yarrow-stalk method produces the same four line types as coins, but not with the same probabilities. Old yin is rarer, old yang is somewhat more common, and stable yin appears more often. That gives yarrow-style readings a different cadence and interpretive feel.
How one yarrow line is resolved
50 stalks total
One stalk is set aside. The working bundle for the line starts with 49 in play.
3 reductions
Each pass removes part of the working count. After 3 reductions, the remaining stalks divide by 4 to give 6, 7, 8, or 9.
6 · Old Yin
A rare changing yin line. The broken line is already turning toward yang.
Line meaning in reading
A changing yin line. In yarrow-style casting, this is the rarest outcome.
7 · Young Yang
A stable solid line. Other valid yarrow reduction sequences can also resolve to 7.
Line meaning in reading
A stable solid line. Less common than stable yin in the yarrow distribution.
8 · Young Yin
The most common yarrow result: a stable broken line.
Line meaning in reading
A stable broken line. This is the most common yarrow-style outcome.
9 · Old Yang
A changing yang line. The solid line is already turning toward yin.
Line meaning in reading
A changing solid line. More common than old yin in the yarrow distribution.
Why the probabilities matter
With coins, old yin and old yang are equally likely. With yarrow, they are not. That means repeated yarrow casts tend to produce a different pattern of movement over time. The difference is not “better” or “more accurate” by default; it is a different structure of chance.
Coins
Fast, simple, equal chance for old yin and old yang, good for repeated everyday consultation.
Yarrow
Slower, less even, more weighted toward stable yin and away from old yin, good when you want a more deliberate rhythm.
A simple view of the traditional process
- Begin with 50 stalks. One is set aside and the rest are divided and counted through repeated passes.
- Reduce the count three times. Each pass narrows the remaining number and determines one line value.
- Resolve the line. The final count yields 6, 7, 8, or 9, just as coins do.
- Repeat for six lines. The figure is still built from the bottom upward.
This site does not simulate the physical handling of fifty stalks directly. It preserves the yarrow-style probability pattern in digital form so the resulting line distribution remains faithful to the method.
When to choose yarrow
- When you want a slower pace that reinforces attention.
- When you care about the traditional probability pattern rather than the speed of coins.
- When you want the cast itself to feel like part of the reflective practice, not just a way to generate numbers.
Common yarrow mistakes
- Assuming yarrow and coins produce the same line distribution.
- Treating yarrow as automatically superior instead of simply different.
- Using a digital “yarrow” cast that ignores the traditional line probabilities.
- Choosing yarrow for prestige rather than because the slower rhythm actually helps your practice.
FAQ
Is the yarrow-stalk method older than the coin method?
Yes. It is generally treated as the older received casting method. Coins became popular because they are much faster and easier to use.
Do I need real yarrow stalks?
No. Real stalks support a tactile ritual, but a transparent digital yarrow-style method can still be structurally valid if it preserves the correct probabilities.
Does yarrow always produce fewer changing lines?
Not in a simple one-line sense. What changes is the distribution: old yin is rarer, old yang is more common than old yin, and stable yin is the most common result.
Is yarrow more accurate than coins?
That is too strong. Yarrow is different, not automatically better. A careful coin reading can be profound, and a rushed yarrow reading can still be shallow.
Related guides
How to Use the I Ching
Learn how to use the I Ching step by step: ask a clear question, cast six lines, read changing lines, and reflect on the relating hexagram.
Read guideYin & Yang
Learn what yin and yang mean in the I Ching, how broken and solid lines express them, and how they shape trigrams, hexagrams, and changing lines.
Read guideHow to Ask the I Ching
Learn how to ask the I Ching a good question, avoid forced yes-no framing, and shape questions that produce clearer readings.
Read guideChanging Lines Explained
Understand I Ching changing lines: what 6, 7, 8, and 9 mean, how old yin and old yang transform, and how to weight changing lines in a reading.
Read guideRelating Hexagram Guide
Learn what the relating hexagram means in an I Ching reading, how it differs from the primary hexagram, and how to use it without treating it as a simple future prediction.
Read guideThree-Coin Method
Learn how the three-coin I Ching method works, how to score 6, 7, 8, and 9, and how coin casts create changing lines and a relating hexagram.
Read guideEight Trigrams
Learn the eight I Ching trigrams — Heaven, Earth, Thunder, Wind, Water, Fire, Mountain, and Lake — and how they shape every hexagram.
Read guideI Ching Journal
Learn how to keep an I Ching journal, record questions, hexagrams, changing lines, reflections, outcomes, and patterns over time.
Read guide