Fernhill — Plant-based cleaning refills

We'd rather show our workingthan ask you to take our word.

Fernhill started in 2019 on a kitchen table in Stroud, Gloucestershire, when Ana and Tom Whitlock worked out that a bottle of spray cleaner is roughly 95% tap water. We now blend concentrates in a small unit two miles from that table, publish every ingredient with its source, and post them in sachets that rot down in a compost heap.

98%

Plant-derived, fully listed

Every concentrate is at least 98% plant-derived, and the full list sits on each product page. The other 2% is a food-grade preservative, and we name that too.

12 weeks

Sachets that rot

Our wood-pulp cellulose sachets break down in a home compost heap in about 12 weeks. They're certified OK compost HOME by TÜV Austria.

18×

The water stays at home

A sachet weighs 30g where a ready-mixed bottle weighs 540g. That means a delivery van carries about 18 times more cleaning per trip.

Four concentrates,one forever bottle each.

Every refill costs £2.20 to £2.90 and makes a full 500ml bottle. Subscribe for 10% off, choose your scents, and pause or skip whenever the cupboard is full.

Home compostable

All-Purpose Spray

Rosemary & eucalyptus

Key ingredients
Coco-glucoside, citric acid, rosemary and eucalyptus oils

Refill
25ml sachet makes 500ml

£2.40per sachet
Home compostable

Washing-Up Liquid

Lemon verbena & thyme

Key ingredients
Sugar-beet surfactant, sodium citrate, vegetable glycerin

Refill
100ml sachet makes 500ml

£2.90per sachet
Home compostable

Bathroom & Shower

Peppermint & tea tree

Key ingredients
Lactic acid from fermented beet sugar, decyl glucoside, peppermint oil

Refill
25ml sachet makes 500ml

£2.60per sachet
Home compostable

Glass & Mirror

Lavender & garden mint

Key ingredients
Plant-derived ethanol, decyl glucoside, lavender oil

Refill
15ml sachet makes 500ml

£2.20per sachet

What seven years of refillsactually add up to.

Since our first sachet left Stroud in 2019 we've counted every bottle that didn't need to be made. These are the running totals at 1 October 2026, and what each one means.

More than 1,284,000

Plastic bottles avoided

Every sachet poured into a forever bottle is one 500ml spray bottle that never got made.

= 48.8 tonnes of new plastic, at 38g a bottle

52,300

Refill packs posted

Each letterbox-sized pack holds twelve sachets and weighs 340g, so it travels flat and light.

= 627,600 sachets, every one home-compostable

186 tonnes

CO₂e saved

Measured against buying the same cleaner ready-mixed in a new bottle and shipping the water.

= 1.1 million km not driven in an average petrol car

Method: bottles avoided counts every sachet sold since 2019 (627,600 by post and 656,400 through 140 independent refill shops) as one 500ml bottle not bought. CO₂e comes from a cradle-to-grave lifecycle assessment by an independent consultancy in 2024, updated each quarter with our sales and shipping data.

Four steps,and nothing to throw away.

A refill takes about a minute at the kitchen sink. Here is the whole routine, from the bottle you keep to the sachet you compost.

1
Get a forever bottle

Our 500ml amber glass bottle comes with a silicone sleeve and a trigger rated for 10,000 sprays. Buy it once and refill it for years.
2
Sachets by post

Choose your scents and we post twelve sachets in a pack that fits through the letterbox. Pause, skip or change the mix any time.
3
Pour, fill, shake

Tip one sachet into the bottle and top up with 475ml of tap water. Shake for ten seconds and it's ready to use.
4
Compost the sachet

The empty sachet goes in your home compost or food-waste caddy. It's gone in about twelve weeks and leaves nothing behind.