木 Wood in a bazi chart
Two different questions get answered with the same word. The first is the governing element, 用神 — the phase a chart is short of or overrun by, which is what the colours, materials and numbers below are chosen for. The second is the phase the Day Master itself stands on, and how much of it the eight characters carry. Both are set out here.
- Character
- 木
- Romanisation
- mù
- Produced by
- 水 Water
- Produces
- 火 Fire
- Controlled by
- 金 Metal
- Controls
- 土 Earth
Where Wood is the governing element
Colours
Your governing element is 木 Wood, and the colours the tradition assigns to it are the colours of things still growing — green in its darker registers, and the blue-green the old texts call 青, a word English has no single equivalent for.
Principal — Forest #2F5D46 · Jade #4E8C6A · Deep Teal #1F4A50 Secondary — Sage #7A9E85 · Ink #14120F. Black is here because 水生木, Water generates Wood, and the classics treat the dark colours as what feeds the green rather than as an opposite to it. Sparing — Pearl White #D8D4CC · Silver #A9A9A6. 金剋木 — Metal cuts Wood. The texts do not forbid white; they observe that a room of it leaves Wood nothing to grow into.
《周禮·考工記》 fixes the correspondence in a line that has not changed in two thousand years: 東方謂之青 — "of the east it is said, 青." Wood's direction is east, and 青 is the colour of the east: not quite green, not quite blue, the shade of new bamboo before it hardens.
The practical form of this is narrower than a mood board. It means the wall you look at while working, the coat you reach for without thinking, the cover of the notebook you actually carry. The tradition is uninterested in what is in your wardrobe and interested in what is in your eye-line for six hours a day.
One caution the classics repeat: Wood's colours darken well and lighten badly. Deep green reads as growth; pale mint reads as nothing at all.
Materials
The materials the tradition assigns to 木 Wood are the ones that were alive, or that carry the colour of living things.
Stone — green jade 碧玉 · malachite 孔雀石 · green aventurine 東陵玉 Grown — bamboo 竹 · sandalwood 檀香 · camphor wood 樟木 Cloth — linen 亞麻
《尚書·洪範》 defines the phase in four characters: 木曰曲直 — "Wood is said to bend and to straighten." Not one or the other. The classical image is not a plank; it is a growing thing that can be pushed off course and will still arrive somewhere upright.
That is why the list runs to bamboo before it runs to hardwood. Bamboo bends further than any timber and does not break, and the old texts return to it constantly for that reason. Sandalwood and camphor are on the list for a second reason: both keep their scent for decades, and the tradition treats a material that goes on working after it has been cut as a different category from one that is merely made of the right substance.
A practical note on jade, since it is the material most people ask about. 碧玉 here means the green nephrite, not the pale white variety, which belongs to Metal. Colour decides the phase, not the mineral name.
What is worth avoiding is not any single material but a room made entirely of manufactured surface. Wood is the phase of the thing that grew, and a laminate that is printed to look like timber is, in this reading, simply not the substance in question.
Numbers
Your numbers are 3 and 8.
They come from the 河圖, the diagram the 繫辭 arithmetic is built on, which assigns every phase two numbers rather than one: 天三生木,地八成之 — "Heaven's three gives birth to Wood; Earth's eight completes it."
The distinction between the two is the useful part, and English-language sources almost never carry it. 3 is the 生數, the generating number — the seed, the beginning, the thing not yet formed. 8 is the 成數, the completing number — the same phase arrived at its worked shape. Every phase has one of each, and they are not interchangeable. The tradition uses 3 for anything being started and 8 for anything meant to last.
In practice the numbers are read where a number is unavoidable and chosen: a floor, a door, a plate, the last digit of a phone number, the count of things in a set. A third-floor flat and an eighth-floor flat both sit with Wood; the tradition would put a new venture on the third and a household meant to stay on the eighth.
Where a number cannot be chosen, the classical method is to reduce rather than to worry. A door numbered 38 carries both. A door numbered 47 carries neither, and the texts say only that it is not yours — not that it is against you.
The numbers the tradition marks as working against Wood are 4 and 9, which belong to Metal, and Metal cuts Wood.
A wood Day Master, and how much wood the chart carries
When wood is thin in the chart
Count the eight characters by phase and wood comes out thin. Your Day Master is wood, so the phase the whole reading is built on is the one with least material behind it in the chart.
Mechanically that means the Self is not self-supplying. Strength has to arrive from outside it — from water, which produces wood, or from other wood standing alongside. Where those are also thin, the chart is read as 身弱, a Self that leans, and the entire method of choosing a governing element changes because of it.
《五行大義》 takes its definition from 《尚書·洪範》: 「木曰曲直」 — wood is said to bend and to be straight. Both at once. A thin wood chart is the version of that where bending does most of the work, because there is not enough material to hold a line by mass alone.
This section counts. It does not judge. A thin phase is not a deficiency and the classics do not treat it as one — it is a shape, and the shape decides which lever the chart responds to.
What the missing phase means for you personally is a separate question, taken up further on.
When wood sits evenly among the rest
Counted by phase, your eight characters spread without a clear winner, and wood — your own phase — sits among the rest rather than above or below them.
An even distribution is the least dramatic result this section can produce and the most often misread. It does not mean a balanced person. It means the chart has no single dominant lever: nothing is so heavy that removing it would change everything, and nothing is so thin that supplying it would. Strength and weakness here are decided by the month rather than by the count, which is why the next section carries more weight than this one for you.
「木曰曲直」 — 《尚書·洪範》, quoted at the head of 《五行大義》 — wood bends and is straight. An even wood chart holds both readings genuinely open.
The practical consequence is that your governing element is chosen on climate rather than on rescue: not what is missing, but what the season calls for. That is the 調候 approach, and it is the harder of the two to do well.
Nothing here is a verdict. It is the shape of the material.
When wood dominates
By count, wood is the largest group in your chart, and wood is also your Day Master's own phase. The Self has more of itself than of anything else.
The classical reading of that is not simply strength. A phase in surplus needs somewhere to go, and the method looks first for an outlet — fire, which wood produces — and second for something that shapes it, which is metal. Without either, the surplus stays inside the chart and the reading is 身旺 with no release, which the tradition regards as a harder structure to work with than a thin one.
「木曰曲直」, from 《尚書·洪範》 by way of 《五行大義》: wood bends and is straight. Where wood is heavy, the straightness dominates and the bending becomes expensive.
Two cautions on reading this. A dominant phase is not a strong personality; it is a count. And a dominant Day Master phase is not automatically 身旺 — the month pillar can overrule the count entirely, which is the subject of the next section.
This section reports the distribution. What to do about it belongs to the governing element.
Cast the chart this page describes
The four pillars, the Day Master, the five-phase count, the day’s almanac read against the chart and the true solar time working — about 2,700 words — are free and need no account. The chart is computed in the browser; nothing about the birth is sent anywhere.