4-Tray Worm factory

In short, this isn’t actually a traditional compost bin, it is a wormery for vermicomposting. It made our list because it is just so good. It doesn’t produce traditional compost, but it produces vermicompost and leachate which is a mineral-rich supplement that is fantastic for the garden. Another reason I love this is that it also doubles as a great educational tool for kids.

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4-Tray Worm Factory

Best Small Indoor Compost Bin

Design – 3
Ease of Use – 4

Compost Quality – 5
Value for Money – 5

Overall Rating: 4.25

All ratings out of 5


  • Great source of leachate
  • Educational
  • Gets rid of food wastes that cannot be composted
  • Small and tidy
  • Modular design


  • Not too attractive
  • Can be a bit smelly so I would keep it in a shed or outbuilding
  • Not suitable for all traditional compostable items

4-Tray Worm Factory – Available at Amazon

Is the 4-Tray Worm Factory any Good?

Yes, the Worm Factory is a great way to recycle food scraps and reduce your waste output. It’s easy to set up and use, and it comes with a helpful guide that will show you how to get started. This wormery can hold up to 4 trays of worms, so it’s perfect for small households or apartments. Plus, the worms will help break down your food scraps into nutrient-rich compost with a side of liquid gold that you can use in your garden or flowerpots.

Does the 4-Tray Worm Factory Need any Maintenance?

Aside from cleaning the empty trays every once in a while, this wormery is ready to go! The worms will do all the work for you – just add your food scraps and watch as they turn them into rich, compost with castings that are about as good as it gets. Enjoy your fresh, organic fertiliser and feel good about reducing your waste output at the same time whilst your Worm Factory works its magic!

Is the 4-Tray Worm Factory Well Made?

The Worm Factory is built with standard quality moulded hard plastic. This means that it should hold up well over time with normal use, although large drops or sharp impacts may cause damage. Overall, it’s a well-made product that should give you many years of faithful service.

Is the 4-Tray Worm Factory Worth It?

Without a doubt. It’s not too expensive and the quality of the compost you get from it is among the finest you can get. Plus, it’s really easy to set up and use, so there’s no hassle whatsoever – as long as you don’t mind handling a few worms!

Does the 4-Tray Worm Factory Need any Extras?

To start off, you will need to purchase tiger worms and a coir block for bedding. You can also buy food pellets, but they are not necessary as long as you have food scraps ready to go. The Worm Factory comes with an instructional booklet that tells you how to set it up and get started.

Does the 4-Tray Worm Factory Work?

The Worm Factory works wonders! Not only does the Worm Factory produce high-quality compost (or “vermicompost”), but it also helps reduce kitchen waste. In fact, vermicompost is considered one of the best sources of soil conditioner available, and the castings can help improve drainage, aeration, and water retention in soils.


The worm factory is one of the best composters available. With a little help from your wriggly worms with a voracious appetite, you will soon have some top-quality fertilizer to treat your plants. If the Worm Factory doesn’t take your fancy, you can check out the other best composters available.


Trevor Wright is not just a seasoned horticulturist; he’s the esteemed Garden Doctor. With a BSc in Horticulture and years of hands-on experience in the soil, Trevor has become a trusted mentor for all things gardening. As the founder of Garden Doctor, he’s committed to clarifying the intricacies of gardening, offering straightforward advice that’s rooted in years of practice. His writing is a garden of how-tos, savvy insights, and comprehensive guides that enable individuals to nurture and grow their garden dreams. When he’s not knee-deep in garden beds, Trevor is at his keyboard passing on his green-thumbed wisdom to budding gardeners, ensuring that the legacy of sustainable and joyful gardening blossoms far and wide.

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