Grain Buds

Meaning

Grain Buds, Xiaoman, is the eighth of the twenty-four solar terms: the Sun at 60°, about 21 May. Its name means “lesser fullness”: the ears of the summer wheat are swelling but not yet ripe, and in the south the early summer rains begin to fill the rivers and the rice fields.

The term is often read as a lesson. The calendar has a Minor Heat and a Major Heat, a Minor Snow and a Major Snow, a Minor Cold and a Major Cold, but no Major Fullness: the year stops at the small one, and the saying goes that a little short of full is the best place to be. Nothing is complete yet, and that is its promise.

It is a principal term, the middle of the Snake month, and it names the fourth lunar month. Its three pentads are the sow thistle in flower, the delicate grasses dying back in the heat, and the arrival of the wheat’s own autumn, its harvest time.

In practice

• In BaZi nothing turns at Grain Buds: the month pillar stays the Snake month’s until Mangzhong. A birth near it is no nearer a change of pillar.
• In the Chinese calendar it names the fourth lunar month.
• The Calendar marks it on its day, with the Sun at 0° Gemini, as the middle of the Snake month.
• In the zodiac and Feng Shui the month animal and the month’s star are those of the Snake month, from Lixia to Mangzhong.

Across traditions

• In Western astrology the Sun enters Gemini at this very moment, the last sign of spring in Western reckoning, the middle of the first summer month in the Chinese one.
• In ancient Greece the maxim carved at Delphi, nothing in excess, says what the Chinese read in this term: a measure kept short of the full.
• In Japan, Korea and Vietnam the term is shōman, soman and tiểu mãn, the same small fullness in three calendars.

Origin and history

The term’s name is in the Huainanzi’s list of twenty-four, in 139 BC, and its signs come from the old seasonal instructions; the Monthly Ordinances of the Book of Rites speak of this month as the time when the wheat is gathered in and the silkworms’ work is done. In the silk country of the lower Yangtze, the season belonged to the silkworms, and the days around Xiaoman were kept for them.

Bitter greens, the sow thistle of the first pentad, were eaten in this season for generations of farming families, a food of the gap before the harvest. The reading of the term as a lesson in moderation is a popular one, repeated in almanacs and proverbs rather than set down by a single author. The Book of Changes says something close in its hexagram of Abundance: the Sun at noon begins to decline, the full Moon begins to wane.

How Ulune calculates it

Ulune takes Grain Buds as the instant the Sun’s apparent longitude reaches 60°, from its table of the solar terms computed with the Swiss Ephemeris for 1800 to 2200. As a principal term it changes no pillar; the Calendar shows it on the reader’s own date. In 2026 it fell on 21 May at 00:36 UT.

Correspondences