KatKin Scoop Planet: Plant-Based Biodegradable Cat Litter

Last updated: 27 August 2026

What it is made of

Scoop Planet is made from pea and millet, both by-products of the food industry, and KatKin states it is 100 per cent biodegradable. The pitch is straightforward: conventional clay litter is strip-mined, which causes habitat loss and erosion, and a plant-based litter avoids that entirely.

A 4.5kg bag holds 12.8 litres, which is worth knowing because plant litters are much lighter than clay for the same volume. Do not compare bag weights across the two types and assume you are getting less.

Key facts

• Made from: pea and millet, from food industry waste
• Biodegradable: 100 per cent, per KatKin
• Bag size: 4.5 kg / 12.8 litres
• Clumping: fast-clumping, which is what a sifting drum needs
• Tracking: lightweight and low-dust, so less spread around the house
• Odour: KatKin describes it as odour-eliminating through absorbency rather than added fragrance

Why it works in an automatic litter tray

This is the part worth dwelling on if you own a rotating-drum tray. These trays sift by turning, so the clump has to hold together as it tumbles. A litter that crumbles produces dust, jams and a drum that needs cleaning far more often.

Scoop Planet clumps quickly and holds, and the granules sit inside the size limits PETKIT specifies. We run it in a PETKIT Purobot Max 3 with the in-app litter-saving mode switched on and it has handled it without complaint. Our full review of that tray covers how the two work together.

What it costs

Checked 27 August 2026 and liable to move.

• Amazon UK: £17.99 for a 4.5kg bag, with Subscribe and Save available
• KatKin direct: sold through katkin.com, often with an introductory discount on a first order

Litter is the recurring cost that quietly matters more than the tray price once you are a year in, so the Subscribe and Save saving compounds.

Honest limitations

Plant-based litters are lighter than clay, which is good for carrying and less good for stability: a boisterous cat will kick it further. Being biodegradable does not mean you can compost used litter at home either. Cat waste cannot go into UK food waste collections, so in practice it goes in your general waste and the benefit is in what the litter is made from, not how it is thrown away.

It is also dearer per bag than budget clay. If your only criterion is price per kilo, this is not the cheapest option and we would not pretend otherwise.

Frequently asked questions

Is KatKin Scoop Planet good for automatic litter trays?

In our experience yes. It clumps fast and holds together in a rotating drum, and the granule size sits within PETKIT’s stated limits. Crystal and non-clumping litters are the ones to avoid in those trays.

How much does Scoop Planet cost?

£17.99 for a 4.5kg bag on Amazon UK as at 27 August 2026, with Subscribe and Save taking roughly 15 per cent off a monthly delivery. It is also sold direct by KatKin.

Is it actually biodegradable?

KatKin states it is 100 per cent biodegradable and it is made from pea and millet. That refers to the litter itself. Used cat litter still cannot go in UK food waste collections, so it will end up in general waste.

Does it track around the house?

Less than clay in our experience, because the pellets are light and low-dust. No litter tracks nothing at all, and a mat under the tray still earns its place.

Do you need to buy KatKin food to get the litter?

No, the litter is sold separately, including on Amazon. KatKin’s fresh food subscription is a different product entirely.

More things like this

• PETKIT Purobot Max 3: the self-cleaning tray we run this litter in.
• Toraphene caddy liners: compostable liners, so the whole tray is not sealed into plastic.
• The new cat toolkit: everything worth buying before a cat arrives.
• Gifts for cat lovers: our full cat gift guide.
• SureFeed microchip feeder review: the feeder that stops one cat eating the other one’s dinner.

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