Begin with the fabric, not the colour scheme

When you are dressing a window in a Georgian terrace or softening a bay in a Victorian semi, it is tempting to start with pattern and colour. But the fabric you choose decides how the curtain hangs, how it ages, and how often it needs replacing. A well-made linen curtain can last twenty years; a cheap synthetic one may sag and fade within three. That gap is where sustainability really lives, long before we talk about farming or recycling. The three fibres below — linen, organic cotton and recycled wool — all suit British homes beautifully, but they behave quite differently, and each asks something slightly different of you.

Linen: the quiet workhorse

Linen comes from flax, a plant that grows happily in poor soil with very little irrigation and few pesticides, and almost every part of it is used. That makes it one of the least thirsty fibres available. For curtains, look for a weight of around 200–260 gsm for a good drape; lighter weights suit Roman blinds and casual café curtains, while heavier, washed linen hangs in deep, generous folds.

Its reputation for creasing is fair, but it is a crease that softens into something lovely. Linen becomes more supple with every wash, and it handles the damp, fluctuating humidity of a British winter far better than many blends. It also filters light beautifully, giving a room that soft, honeyed glow.

• Durability: excellent, especially when lined; the fibres are strong even when wet.
• Care: machine wash at 30°C, line dry, press while slightly damp. Avoid tumble drying.
• Best for: living rooms, bedrooms and anywhere you want relaxed, lived-in elegance.

Organic cotton: soft, versatile, dependable

Cotton is the comfortable middle ground. It takes dye evenly, holds a print crisply, and feels gentle against the skin, which makes it ideal for cushions, seat pads and pelmets. The catch is water. Conventionally grown cotton is famously thirsty, so if you are buying new, look for certified organic cotton, which is grown without synthetic pesticides and uses notably less water.

Cotton velvet is a particular favourite for cushions: it brings a rich, light-catching depth to a plain sofa. For curtains, a cotton lining or a cotton-rich curtain fabric works well in smaller rooms where linen might feel too heavy. Do check whether the fabric is pre-shrunk, as untreated cotton can move by several per cent on the first wash, and that is enough to spoil a precisely made curtain hem.

• Durability: good, though it abrades faster than linen in high-traffic spots.
• Care: wash at 30°C, cool iron, and accept that pale shades will slowly soften in sunlight.
• Best for: cushions, blinds, children's rooms and bedrooms.

Recycled wool: warmth with a second life

Wool is the great British insulator. It regulates temperature and humidity, absorbs sound, and is naturally resistant to dirt and, to a degree, to flame. Recycled wool is usually made from post-consumer knitwear, blankets and tailoring offcuts, which are sorted by colour, shredded and re-spun. Nothing new is farmed, and much of the material would otherwise be discarded.

Pure recycled wool can be a little fragile, so it is often blended with a small proportion of recycled polyester for strength. That is a reasonable trade-off: the resulting cloth is durable, holds a beautiful tweed-like texture, and is perfect for interlining curtains or for winter cushions. Be aware that wool needs protection from moths — lavender bags and a good vacuuming behind the sofa go a long way.

• Durability: very good, particularly in blended weights.
• Care: wool cycle or hand wash cool, dry flat, never tumble dry, and store clean.
• Best for: interlining, draught-excluding door curtains and textured cushions.

Care is where sustainability is won or lost

The greenest curtain is the one already hanging. Whatever you choose, a few habits will add years to its life. Line your curtains — a cotton or wool lining protects the face fabric from sunlight, improves drape and adds insulation. Wash less often than you think necessary; airing and a soft brush will revive most fabrics. Repair a dropped hem or a frayed leading edge before it spreads, and keep a small bag of spare fabric and thread with the curtains when you store them.

Watch the small components too. Metal rings, hooks and weights outlast plastic, and a well-fitted wooden or metal pole can be re-used for decades. If you are replacing only the fabric, keep the hardware.

Mixing the three for a layered, lasting scheme

The most elegant British interiors rarely use a single fibre throughout. Try heavyweight linen curtains with wool interlining for warmth, cotton velvet cushions in a deeper tone, and a wool throw over the arm of a chair. Keep to a restrained palette — oatmeal, clay, deep green, faded indigo — and let texture do the talking.

Buy less, buy well, and choose fibres that will look better in five years than they do today. That is a quiet sort of luxury, and it suits these islands perfectly.