Making string in the forest comes down to finding fibrous plant material, separating the fibers, and twisting them together using a simple technique called reverse wrapping. With the right materials and a bit of practice, you can produce cordage strong enough to lash a shelter, rig a fishing line, or bind tools. The process works with dozens of common plants and trees, and the basic twisting method has been used for thousands of years.
Finding the Right Materials
The best cordage fibers come from three parts of plants: the inner bark of trees, the stems of fibrous plants, and the leaves of certain species. What you use depends on what grows in your region and what you need the string for.
For tree bark, cedar is one of the easiest and most reliable sources. The usable fiber sits in the inner bark layer, just beneath the rough outer bark. You can access it by scoring through the outer bark about an eighth to a quarter inch deep, then peeling away the stringy inner layer. Basswood (linden) works similarly, and in northern forests, paper birch bark can be torn into thin strips for lighter binding. In the Pacific Northwest, western red cedar has nearly 200 documented fiber uses among Indigenous peoples.
Fibrous plant stems are another strong option. Stinging nettle, dogbane, and milkweed all contain long, tough fibers running the length of their stalks. These are called bast fibers, and they sit between the outer skin and the woody core. Milkweed cordage twisted to just 1/16 inch in diameter can hold over 15 pounds, which is more than enough for a fishing line or snare.
Leaf fibers from yucca and cattail also make excellent cordage. Banana yucca is especially strong. Indigenous peoples historically soaked the leaves in water, then pounded them on flat rocks to expose individual fibers. If you’re in a grassland or arid area, yucca leaves can be split and twisted into rope, brushes, or cord.
Preparing the Fibers
Raw plant material usually needs some processing before you can twist it into string. The goal is to isolate the long, flexible fibers from the rest of the plant tissue.
For dead, dry stalks of plants like nettle or dogbane, you can often crack the woody core by bending the stalk and then peel the outer fiber strips away by hand. If the stalks are fresh and green, the fibers will be harder to separate. Soaking them in water for a few days helps. This is a simplified version of “retting,” where moisture and natural bacteria break down the material binding fibers to the stem. In traditional processing, plants are spread out on the ground and left for three to six weeks, but for basic forest cordage, even a day or two of soaking makes a noticeable difference.
For inner bark, peel it into the thinnest strips you can manage. Thinner strips twist more evenly and produce stronger string. If the bark feels stiff, soaking it briefly will make it more pliable.
Tree roots can also work as cordage, particularly spruce roots. Dig up roots near the surface, then peel off the reddish outer layer, which will rot if left on. Boiling the roots for about 15 minutes softens them enough to split lengthwise into fine, flexible strands. Let them dry for storage, then soak them again when you’re ready to use them.
The Reverse Wrap Technique
This is the core skill. Reverse wrapping turns loose fibers into a two-ply twisted string that holds its shape under tension. You don’t need any tools.
Start with a bundle of fibers roughly 18 to 24 inches long. Find the center point (or slightly off-center, which helps later when you need to add new fibers). Pinch the bundle at that point between the thumb and forefinger of your non-dominant hand, creating two legs hanging down.
Here’s the motion: take the leg closest to you and twist it away from your body (clockwise if you’re right-handed) using your dominant hand’s thumb and forefinger. Give it several tight twists. Then wrap that twisted leg toward you, crossing it over the other leg so their positions swap. Now pinch the twist point again to hold everything in place. Repeat with the new front leg: twist away, then wrap toward you. Each cycle locks the previous twist in place, and the opposing forces keep the string from unraveling.
It feels awkward for the first few inches. By the time you’ve done a foot of cordage, it becomes almost automatic.
Adding Length With Splices
Individual plant fibers are rarely more than a couple of feet long, so any useful piece of string requires adding new fibers as you go. The technique is straightforward: when one leg gets short (about two inches remaining), lay a new bundle of fibers alongside the short end, overlapping by at least an inch or two. Then continue twisting and wrapping as normal. The twist locks the new fibers into the cord, and the friction holds them in place.
Stagger your additions so both legs aren’t spliced at the same point. If both joints overlap in the same spot, that becomes a weak link. Offsetting them by several inches keeps consistent strength along the whole length.
Making Stronger Rope
Two-ply string made this way is good for light tasks like lashing, fishing line, or binding. For heavier jobs, you can twist two finished strings together into a four-ply cord using the same reverse wrap technique. Treat each completed string as a single “leg” and repeat the process. This roughly doubles the thickness and significantly increases the breaking strength.
The tightness of your twist matters. Loose twists make floppy, weak string. Tight twists produce cord that feels firm and holds knots well. If fibers start poking out at odd angles, you’re either twisting too loosely or your fiber bundles are too thick for the diameter you’re aiming for.
Animal-Based Alternatives
If you’ve harvested game, sinew makes some of the strongest natural cordage available. The easiest pieces to collect are the tendons from the lower legs and the silvery membrane along the backstrap of deer or similar animals. Cut these free with a sharp blade, scrape off any remaining meat, and let them dry for a few days in a sunny spot. Slicing them lengthwise before drying speeds the process.
Test for dryness by pounding. When the fibers separate and peel apart cleanly, they’re ready. Pound them with a smooth river cobble or the flat side of a tool handle. Avoid anything with a rough or gritty surface, which will cut the fibers instead of separating them. Once pounded apart, individual sinew strands resemble dental floss and can be twisted into cordage the same way as plant fibers, or used individually for sewing and binding.
Harvesting Responsibly
If you’re practicing this skill outside of an emergency, take only what you need. Stripping inner bark can kill or seriously damage a tree, so work with fallen trees, deadfall, or branches rather than live trunks when possible. For plants, harvest from abundant patches and leave most of the population intact.
Indigenous peoples across North America developed harvesting protocols over thousands of years of direct experience with these landscapes. These aren’t just ceremonial traditions. They’re practical systems for ensuring plant populations stay healthy. If you’re foraging on or near Indigenous lands, learning about local protocols is worth the effort. The USDA recommends connecting with local Indigenous communities to understand which practices best support both plant health and sustainability in a given area.