Plant Fibres in Knitwear: Lyocell, Hemp, Ramie
Quick answer
Cotton dominates plant-fibre knitwear, and three others earn a place beside it for different reasons. Lyocell gives drape and a cool hand that cotton cannot match, which suits flowing knits. Hemp is durable, naturally antibacterial and has a dry linen-like texture, which suits relaxed summer pieces. Ramie is stiff, lustrous and extremely strong, best used in blends where its crispness is an asset. All three shrink and crease differently from cotton, so none of them can be specified from a cotton template.
Ask a mill for a plant-fibre knit and the answer is cotton, because cotton is what the machinery and the yarn supply are built around. That is a reasonable default and a limiting one. Lyocell, hemp and ramie each solve a problem cotton cannot — drape, durability, or a dry textural handle — and each brings a specific set of behaviours that a buyer has to plan for rather than discover.
What is lyocell, and why does it drape so well?
Lyocell is a regenerated cellulosic fibre: wood pulp dissolved in a solvent and spun into filament, then cut into staple for spinning. It is chemically related to viscose and modal, but produced in a closed-loop solvent process that recovers most of the solvent rather than discharging it — which is the source of most of its sustainability positioning. Our notes on recycled and organic fibres cover how that positioning is certified.
The reason it matters in knitwear is the combination of drape and a cool, smooth hand. A lyocell knit hangs heavily and softly, where a cotton knit of the same weight sits stiffer. That makes it useful for dresses, flowing tops and relaxed silhouettes — the category where cotton reads as casual and lyocell reads as considered. Our notes on knitted dresses cover the styles it suits.
The trade-offs are real. Lyocell is weaker when wet, so it needs gentler washing than cotton, and it can fibrillate — develop a surface fuzz — under abrasion in certain processing conditions. A competent spinner manages that, but the buyer should ask. It also shrinks more than cotton in the first wash unless the finishing controls it.
What does hemp bring to a knitted garment?
Hemp is a bast fibre from the stem of the plant, similar in character to linen. It is strong, durable and naturally resistant to mildew and odour, and it has a dry, slightly rough handle that reads as natural and unpolished.
In knitwear, pure hemp is uncommon because it is stiff and has little elasticity. It works best as a blend component — hemp with cotton for a dry summer knit, hemp with lyocell for drape plus texture, hemp with a small amount of wool for a rustic winter piece. Blended at twenty to forty percent, it contributes durability and texture without dominating the hand.
Two practical points. Hemp creases readily, which is either the point or a complaint depending on the customer. And it is difficult to dye to deep, bright shades — the fibre takes colour but tends toward muted, earthy results, which suits a natural-palette range and frustrates a brand chasing a vivid seasonal colour.
What is ramie, and why is it used in blends?
Ramie is another bast fibre, from a nettle-family plant, and it is one of the strongest natural fibres available. It has a natural lustre — almost silky in the right light — and a crisp, stiff handle that holds shape well.
Pure ramie knitwear is unusual because the fibre is brittle and inflexible, and it creases sharply. Its value is in blends: a small proportion adds lustre, strength and shape retention to a cotton or lyocell knit, and it can give a subtle crispness that reads as premium in lightweight summer pieces.
The processing point is that ramie requires degumming before it can be spun, which is an extra step and part of why it costs more than cotton despite being an agricultural fibre. Buyers should also expect some variability in the fibre, because ramie processing is less standardised than cotton.
How do they compare with cotton?
- Drape. Lyocell drapes most, ramie least. Cotton sits between, and hemp is closer to cotton but drier.
- Hand feel. Lyocell is smooth and cool; cotton is soft and familiar; hemp and ramie are dry and slightly rough. Our notes on hand feel explain how to specify this rather than describe it.
- Shrinkage. All three move more than a well-finished cotton, and lyocell in particular needs the finishing route specified. Our notes on shrinkage control cover the mechanism, and cotton sourcing gives the baseline to compare against.
- Dyeing. Cotton takes reactive dye well and holds bright shades; hemp and ramie tend muted; lyocell dyes well but with different depth behaviour. Our notes on colour fastness cover what to test.
- Cost. Cotton is the cheapest of the four at equivalent quality. Lyocell sits above it, hemp and ramie above that once processing is counted.
What goes wrong with plant-fibre knits?
Shrinkage surprises. The most common failure. A lyocell or hemp knit finished like a cotton one will move more than the buyer expects, and the return arrives as "it shrank". Specify a maximum shrinkage figure tested to a standard, as our notes on lab testing describe.
Creasing in wear. Hemp and ramie crease, and a customer who expected cotton behaviour will read it as a quality problem. It belongs in the product communication, a point our notes on product page copy cover.
Pilling and fibrillation. Lyocell can fibrillate under abrasion and blends can pill. Our notes on preventing pilling explain the mechanism and the tests.
Blend drift. Because these fibres are usually blend components, a supplier substituting a cheaper proportion changes the hand and the performance. Our notes on yarn substitution explain why that needs written approval.
How should a buyer specify them?
- State the blend percentages exactly, and require written approval for any change. A five percent shift in a hemp-cotton blend is a different garment.
- Name the finish, not just the fibre. Lyocell's drape and shrinkage both depend on how it is washed and relaxed, which our notes on dyeing and finishing cover.
- Set a shrinkage limit and test it. Non-negotiable for any of the three.
- Approve colour on the actual blend. These fibres dye differently from cotton, and a lab dip approved on cotton will not translate.
- Keep the knit structure simple with hemp and ramie. Their stiffness fights complex stitch work, and a cable in hemp reads as lumpy rather than defined.
- Check the care route. Lyocell in particular is weaker wet, and the care instructions should reflect that — our notes on care labelling cover the compliance side.
At YZR Sweaters we work with partner factories holding BSCI, SEDEX and Oeko-Tex certifications, welcome factory audits, and support third-party inspection through firms such as SGS and BV. On plant-fibre programmes we confirm the blend, the finishing route and the shrinkage limit before sampling, because lyocell, hemp and ramie all reward a buyer who specifies those three things and punish one who assumes cotton behaviour.
Looking at lyocell, hemp or ramie for a range and want to know how they will behave in the knit? Send us the styles and target hand feel and we will come back with the options.
Get a free quote Browse our knitwear rangeFrequently asked questions
Is lyocell a natural fibre?
It is a regenerated cellulosic fibre — the raw material is wood pulp, which is natural, but the fibre is manufactured by dissolving and re-spinning that pulp. That places it between natural and synthetic: plant-derived, but industrially produced, which is why its environmental credentials depend on the solvent recovery and the pulp sourcing rather than on the word natural.
Can hemp be used in a knitted sweater?
Rarely on its own, because it is stiff and has little elasticity. It works well as a blend component at twenty to forty percent with cotton, lyocell or a small proportion of wool, where it contributes durability and a dry texture without dominating the hand. Pure hemp knitwear exists but is a specialist product for a customer who wants that crispness.
Why does my lyocell knit shrink more than cotton?
Because lyocell has different shrinkage behaviour and needs its own finishing route to control it. A programme finished like a cotton knit will move more in the first wash. The fix is to specify a maximum shrinkage figure tested to a standard and to confirm the finishing route, rather than assuming cotton settings apply.