The elders whisper the date like a prayer: 1829. That year, the great mandarin Nguyễn Công Trưng—a man with the vision of a poet and the will of a pioneer—led a daring reclamation. Under King Minh Mạng’s gaze, he tamed the wild marshes between the Càn and Đáy rivers. From that brackish void, the Kim Son region was born. And with it, a livelihood: sedge. The mandarin saw what others did not—that the saline soil could nurture carex, a grass as resilient as the settlers themselves. Generation after generation, the villagers pushed the coastline further out, carving hundreds of hectares of rich, silty earth for their precious crop.

In those early days, weaving was a humble affair. Mats. Baskets. Things for the floor, for the harvest. But time, as it does, refined the raw into the sublime. Today, the artisans of Kim Son are no longer mere craftsmen; they are alchemists of fibre. Lanterns that glow with a soft, earthly light. Trays that hold the memory of the fields. Handbags and hats that would not look out of place in a Saigon salon, and even children’s toys—each piece carrying the durability of the countryside and the elegance of a bygone age. In 2024, the craft was officially recognised as a National Intangible Cultural Heritage. A quiet coronation for centuries of silent devotion.

From Raw Stem to Refined Soul

To understand the object, one must first understand the ordeal. The journey begins at dawn, in the fields. Fresh sedge stems are sorted by length, then split and laid under a sky that knows no hurry. The old technique demands “three suns” and a week of dew-kissed nights, until the stem turns the colour of clotted cream—supple, resilient, and pure. Then comes the bath: one to two days submerged in water to ward off mould. Finally, the selection. Thick, long strands for the grand mats. Finer, smoother fibres for the delicate baskets and vases. Every choice is a promise of longevity.

But the true soul of the craft lies in the dyeing. Here, in the shaded courtyards of Kim Son, the weavers do not colour finished products. They dye the very fibres before the loom sings. It is a dance of chemistry and intuition. One must understand how each fibre drinks the pigment, how the weather whispers its demands, how the temperature shifts the hue.

I was granted a glimpse into these guarded secrets by Meritorious Artisan Nguyễn Ngọc Thạch, a third-generation weaver from Phat Diêm commune. His family’s method is an ode to old-world ingenuity. Rusted iron tools—cleaned and boiled—create a dark, potent solution. Natural dyes are added, and the sedge fibres are cooked within. The iron oxide locks the colour with a vibrancy that others cannot replicate. “My grandmother taught me,” he says, smiling. And you can see the centuries in his hands.

Thạch began weaving at six. Fifty years later, he speaks of the craft as a meditation. “The smoother side of the sedge must face inward,” he explains. “The thicker root end must be shaved until it is uniform.” He shows me a hidden join—invisible, strong, almost magical. It is this patience that elevates a basket to an heirloom.

The Language of Weave

The language of weaving is rich here: wavy, rice-grain, herringbone, eyelet. Plain weaves for solidity. Eyelet for breathability and shadow play. Twisted weaves for a contemporary edge—proof that a centuries-old craft can still flirt with the modern.

Natural Dyeing Secrets

The artisans of Kim Son guard their dye recipes like family treasures. Using rusted iron, indigo, turmeric, and areca nut extracts, they achieve hues that deepen with age. The iron-oxide method, perfected by the Thạch family, produces a deep, earthy black that never fades — a signature of authentic Kim Son sedge. Some weavers still use mud from the alluvial fields to fix colours, a technique whispered to be over a century old.

Where to Experience Kim Son Sedge Craft

The village of Phát Diệm (Kim Sơn district) is the epicentre of sedge weaving. Many households open their workshops to travellers. Visit the Kim Son Sedge Weaving Cooperative, where you can watch artisans at work, try your hand at a simple weave, and purchase authentic pieces directly from the makers. For a deeper immersion, arrange a half-day class with Meritorious Artisan Nguyễn Ngọc Thạch — his family welcomes small groups by prior appointment.

Best season: March to October offers sunny days ideal for seeing sedge fields and outdoor weaving. The harvest of sedge takes place twice yearly (around May-June and November-December), when the villages buzz with activity. For festival lovers, the Kim Son Traditional Craft Festival (held every two years, next in 2027) showcases competitions, parades, and live weaving demonstrations.

How to buy authentic pieces: Look for the “Kim Son sedge” label and signs of hand-weaving — slight irregularities in the weave and the natural, earthy scent of sun-dried fibres. Avoid machine-made imitations sold in tourist markets. The cooperative and artisan homes offer fair-trade prices; a medium handbag costs around 300,000–500,000 VND ($12–20 USD), while a large floor mat may be 1,000,000–2,000,000 VND ($40–80 USD).