Free fibers from plants

Soak nettle or flax stems in water until the woody parts rot away and the long strong fibers come free.

takes patience⏳ two weekstradition — not yet hand-tested

Inside the stems of some common plants — stinging nettle, flax, hemp — run long, strong strands, like hidden string. They are what holds the plant upright. The trick to getting them out is called retting (say it like "wetting"): you soak the stems until the soft, gluey parts rot away, and the tough fibers are left behind. Rot does the hard work. You just wait.

These fibers spin into thread finer and stronger than most grass cordage, and thread becomes cloth. Every linen shirt in history started exactly this way: a wet bundle of stems, and patience.

You need

• Tall, straight plant stems — nettle or flax are best. Nettle grows wild almost everywhere; pick stems taller than your knee, ideally chest-high, in late summer when they start to yellow. Flax is a farmed plant with small blue flowers, pulled up whole, roots and all, when the stems turn yellow.
• Gloves or a thick cloth for nettles — the sting is in tiny hairs on the leaves and stem surface. It hurts but does no lasting harm.
• Still or slow water — a pond edge, a ditch, a barrel, or a big pot. Warm is faster than cold.
• Stones or logs to hold the bundles underwater.
• String to tie the bundles (you know how to make it — that is why this guide needs cordage first).
• A smooth stick or wooden mallet for breaking the dried stems later.

Steps

1. Cut or pull the stems and strip off all leaves and side branches.
   • For nettles, run a gloved hand from bottom to top; the leaves pop off.
2. Tie the bare stems into loose bundles about as thick as your wrist.
3. Sink the bundles fully underwater and weight them down with stones.
   • Warm summer water: check after 5–7 days. Cold water: it can take 2–3 weeks.
   • The water will go dark and smell bad. That is normal — it means the rot is working.
4. Test a stem every day or two after the first week: bend it and scrape it with your thumbnail.
   • Ready = the green outer skin and fibers slide off the woody core easily, and the core snaps clean.
   • Not ready = the fibers cling tight. Give it more days.
5. Pull the bundles out the moment they pass the test, rinse them in clean water, and spread them to dry fully — a few sunny days. Stems must be bone-dry before the next step.
6. Break the dry stems: lay a handful over a log edge and bend, crush, or tap them along their whole length with a stick.
   • The brittle woody core cracks into short bits; the fibers stay long and bendy.
7. Shake and scrape off the woody bits (this scraping is called scutching — just a word for cleaning). Draw the fiber over a blunt wooden edge until only soft strands remain.
8. Comb the strands through anything with teeth — a coarse comb, or nails driven through a board — to line them up straight and pull out short scraps.
   • You now have a smooth hank of fiber, like pale hair. It is ready to twist or spin.

Watch out

• Pulling the stems out too late rots the fibers themselves — they turn weak and crumbly. When in doubt, take them out a day early; slightly under-retted fiber is just harder to clean, not ruined.
• Pulling out too early means the fibers won't let go of the wood. You can put the bundle back in the water and keep soaking.
• The rot water is foul. Don't ret in drinking water, and don't dump the smelly water near a well or where animals drink. Wash your hands after handling it.
• Wet fiber left in a heap will molder. Dry it spread out and airy, never in a pile.
• Nettle stings: fresh nettles sting; retted ones don't. If stung, don't scratch — cool water helps, and it fades within hours.

How it works

The fibers are bundles of plant cells glued to the stem by a natural gum called pectin — the same stuff that sets jam. Bacteria in the water eat the pectin but leave the tough fiber almost untouched. Retting is simply letting the right rot happen, then stopping it in time.