瓜熟蒂落

Origin and story

Zhang Zuan's Liang-dynasty Fu on Melons follows the fruit from sowing and sprouting through flowering to maturity. Sheltered beneath leaves, the melon ripens and comes away from its stem, releasing its fragrance. The poem supplies an early version of the natural image, though not the exact modern four-character sequence.

The exact expression is documented in the Song Daoist anthology Yun Ji Qi Qian, volume 56, where ripening and separation illustrate completion at the proper time. Later uses include childbirth and the successful conclusion of something whose conditions have matured. The point is readiness, not that results arrive without preparation or effort.