HomeBuying GuidesLawn & GardenThe Best Worm Composters To Buy - Updated 2022

The Best Worm Composters To Buy – Updated 2022

What Is Worm Composting?

Worm composting is a lot faster and more efficient method of breaking down waste into compost than keeping a hot compost pile in your garden.

Essentially, you feed your waste to worms, and what comes out the other end is known as “worm casting” – simply worm faeces – which is rich in nutrients that your flowers and plants will appreciate.

Once you’ve formed a worm colony, you can just keep feeding them domestic garbage like fruit, vegetables, pasta, bread, coffee grounds, tea bags, eggshells, and even paper and cardboard. You can use the resulting castings as fertiliser once they’ve treated it.

Consider it a partnership: you give the worms a place to live, keep them warm, and feed them. In exchange, the worms will dispose of your trash and give you with high-quality fertiliser for your garden. That appears to be an excellent deal!

The Best Worm Composters To Buy

vidaXL Eco-friendly 4-Tray Worm Factory

vidaXL Eco-friendly 4-Tray Worm Factory Composter Waste Bin System Gardening
  • This eco-friendly 4-tray worm factory is an upward migrating composting worm bin system that uses worms to turn your kitchen scraps and junk mail into nutrient rich compost.
  • With our worm factory, the entire process becomes quicker and easier
  • Simply add a handful of worms and your organic waste to the bottom tray
  • The worms will start processing the food
  • Once the bottom tray is filled, add another tray

In terms of ease of use, compact size, composting capacity, and pricing, the VidaXL is without a doubt the best. It’s a stackable system that eliminates the majority of the issues that most DIY one-bin systems have.

How it works: After putting the kit together (which is simple and requires no equipment), the first tray is prepared to house the composting worms that come with the purchase.

Red wigglers or tiger worms, as well as European nightcrawlers, are  the best composting worms for the UK 

When temperatures are warm and conditions are favourable (soft decomposing food) and the temperature is between 20 and 25 degrees Celsius, worms can consume one-third to half of their body weight, or up to 250 grammes at first. Worms process less when it’s cooler.

You might perhaps fill the 100-litre space with garbage and worm castings, or utilise one of the trays for sifting or temporary storage. It also means that by the time you begin the fourth tray on top, the bottom tray will be full of fully processed worm compost ready for use on plants.

Be aware that lifting one tray full of worm compost requires some strength, since it can easily weigh 12–13 kg, making it unsuitable for people with back or joint difficulties.

What’s included in the VidaXL package?

The item is constructed from recycled plastic:

4 x Composting trays (43cm x 43cm x 17cm depth each). (about 100 ltr total volume)

1 × Drain Tap for Sump Tray

1 Unit of Base

2 wing nuts and bolts (no tools required)

a single lid

To get you started the kit contains:

There’s no need to look for a worm provider when you have 500g of mixed composting worms.

Coir block produces 9 litres of ph-neutral bedding, allowing worms to settle down fast and avoid escaping.

250g Worm food to get the worms off to a good start and to keep on hand in case you run out of food or are going on a long vacation and need your neighbour to take over.



Wormcity itself is relatively simple to use once the worms have settled in. Lift the lid 2-3 times a week to add food, then open the tap to drain the liquid. Lift the trays till you reach the lowest level to harvest the worm compost.

Capacity: The highest tray capacity offered is up to 25 ltr per tray. In actuality, it won’t be completely full by the time everything is composted, but you’ll still have a lot each tray.

Durability: The plastic is tough, and there are no moving parts to break.

Good value for money

It’s a good outdoor wormery composter for the money because of its enormous capacity and ease of use. Please keep in mind that it must be kept out of direct sunlight and protected from strong winds and rain, which could cause the lower trays to flood. For year-round worm composting, the worm bin must be kept at a temperature of at least 15 degrees Celsius.

Warranty period: 5 years


No venting holes — this necessitates more careful monitoring of the conditions in the top tray, which is the most dynamic due to bacteria attacking fresh food and fast depleting oxygen, and it can get uncomfortably, if not dangerously, hot for the worms inside the bin. There are a couple of methods around this: drill some holes in the side of the lid (no, worms won’t get out if the circumstances are perfect inside the bin) or put the lid with a gap.
When full of worm compost, trays might be difficult to lift.

WormBox : Wormery composter 3 Green Trays + Planter

WormBox : Wormery composter 3 Green Trays + Planter - 56 liters
  • 3 trays for a 3 to 4 person household 👩‍👩‍👦‍👦 + Planter for your plants - Volume of 56 liters - Interior use : kitchen, pantry, garage, ...
  • Ultra-strong : withstands a load of 100 kg 👍 - 15-year guarantee : Made in France - recycled plastic.
  • WARNING : Comes without the composting worms 🐛, you can order them from our Worm farm on Amazon, click on Moutta Farm on your right.
  • 📦 Package Contents : 1 lid + 3 green trays + 1 black planter + 1 liquid collector with tap + 1 base with 4 wheels + 1 booklet (in English) + 1 sticker (in English) for the lid.
  • ♻ Scalable : Order additional trays as your processing volume needs grow.

This stylish, circular two-tone stacking wormery by Recyworm is great for where space is at a premium and looks equally at home indoors or out. The solid lid can be used as a seat (maximum load 100 kg) or replaced with a tray so that plants can be grown on top. The wormery can be readily moved around because to the casters on the base, and the overlap on the trays makes it totally rainproof, so it doesn’t need to be placed under cover. Green, turquoise, raspberry, beige, and blue are just a few of the tray colours that contrast with the black lid and base. It should be kept out of direct sunlight, as with all wormeries, because the worms will die if it becomes too hot.

How easy is it to set up and use the WormBox wormery?

The WormBox can be put together without the use of tools, albeit having small hands helps with screwing on the washer that goes on the tap inside the sump. The trays include all-around grips for easier handling, and the worm liquid sump has a raised interior that acts as a shelter for any worms that fall through and drown in the liquid. The only minor difficulty we had with the WormBox is that the tap is close to the ground, necessitating the use of a shallow container while emptying the liquid.

Who is WormBox wormery most suitable for?

The smart and versatile design will be appreciated in any home where space is limited or where the wormery is prominently displayed. It can be placed in the corner of a room or outside on a patio or balcony, and it does not require weather protection. The 16-litre capacity trays process a decent quantity of waste: two trays are likely to be plenty for 1-2 people, but additional trays, up to a maximum of four trays, can be purchased for a bigger family.

Is the WormBox wormery good value for money and well-made?

The WormBox is built to last. The black components are made entirely of recycled plastic, and the price includes both worms and bedding. This isn’t the cheapest stacking wormery, but it’s also not the most expensive. However, because this product must currently be ordered from France, the price may likely fluctuate based on the euro exchange rate. It is covered by a 15-year warranty.

Green Tiger Rainbow Standard Wormery

Green Tiger Rainbow Standard Wormery 3 x Trays, Organic Compost, 5 year warranty
  • ▶ CREATE ORGANIC COMPOST - turns Kitchen Food Waste into Organic Natural Compost which is Ideal to Help Improve Garden Plant Growth
  • ▶ SAVE MONEY - forget buying expensive Organic Compost when you can create your own from left-over Food and Kitchen Waste
  • ▶ COMPLETE SET INCLUDED - includes everything you need to get started right away including: Tiger worms, coir bedding, lime mix and instructions
  • ▶ AFTERCARE SUPPORT - should you have any questions or issues, a team of Wormery Experts are just an Email, or a Phone call away
  • ▶ 5-YEAR GUARANTEE - includes Fast and Secure Shipping along with a 5-year Guarantee for your peace of mind

The Tiger wormery is a stackable wormery with a minimum of three and a maximum of four medium-sized trays. Six colours are available, ranging from muted terracotta and black to vibrant primary colours like red, blue, and purple. The wormery can be placed inside or outside, but it must be protected from rain because the stacking design allows water to enter, which can cause the compost to get too damp. It should be kept out of direct sunlight, as with all wormeries, because the worms will perish if it gets too hot.

The Tiger Wormery is simple to put up and requires no tools. The complete written and graphic instructions are easy to follow. The top features a lift-up handle that is useful for adding waste, and the trays’ grip handles, while not big, are enough for simple holding when filled. It makes good compost, but we discovered that the sump where the worm liquid accumulates needs to be emptied more regularly than the others, both because of its tiny size and because worms that fall through the smooth edges could drown. Although being close to the ground allows slugs to access the wormery, the square base ensures the wormery remains sturdy when in operation.

The Tiger wormery can be made up of as little as three trays for a household of two to three individuals, but four trays are likely to be required for a bigger family. This model is especially excellent as a gift because of the variety of products included in the starter pack. Children are drawn to primary colours that are bright and bold.

The Tiger Wormery is reasonably priced, and the wormery itself is solidly constructed, but the tap’s flip-over handle didn’t feel particularly sturdy. A 5-year warranty is included.

Maze Worm Farm

Maze worm farm
  • This stylish yet customisable wormery fits seamlessly into any area around your home.
  • Unlike other bulky wormeries, the Maze farm only requires a small space and is built to look amazing on your balcony, deck or garden whilst providing huge value
  • A great way to turn waste into beautiful compost to help give your plants and flowers some real nutrition to help with growth.
  • Features two working trays (to rotate when one is full), lid, base, liquid collection tray and coconut peat.Easy sliding worm tray.
  • The Maze Compost Tumbler includes: 2 x trays 1x lid 1 x base 1 x worm tray 1 x liquid collection tray 1 x coconut peat Dimensions: 381 x 381 x 279mm Weight: 3.6kg

This 3-cubic-foot composter includes two primary stacking trays that can be rotated as needed, as well as a cover with a handy internal hook that can be hung from the bin’s side as you add scraps. Because an open drip pan rests beneath the device to catch worm tea as it drains, it’s best used outside. A perforated “worm saver” tray is included with this bin to keep your wrigglers from escaping through the bottom. It’s produced of recycled plastic in Australia and comes with a one-year warranty.

This is a good introduction to what worm composters can do if you’re short on space.

Urban Worm Bag

Urban Worm Bag - Worm Composting Bin - Breathable Worm Farm is Perfect for Recycling Organic Waste in Your Home, School, or Office
  • Make plant fertiliser yourself â ² compost worms transform organic waste into soil activating worm humus
  • Worm farm: for balcony, garage, basement or garden shed
  • Feed at the top, harvest humus at any time, the gravity fills
  • Little work - Breathable surface regulates air and water balance
  • Detailed operating instructions - German/English/French are included

The creator of the urban worm bag wanted to take the benefits of continuous flow through worm farms (which are normally huge scale) and reduce them to a design that could fit in a regular garage, shed, or garden.

The result is a huge breathable plastic-fabric bag suspended from a solid metal frame with a zipped lid on top. It’s quite light and can be folded up when not in use, making shipping a breeze. This design has a number of benefits.

One of the most significant advantages of this design is its breathability. When someone isn’t attentive and pours too much wet food in, it allows surplus water to evaporate or drop down to the bottom, regulating moisture levels. Because moisture regulation occurs even when the bag is zipped shut, pests such as fruit flies are unable to enter.

Worm composting is even easier with the worm bag: On top, you place food and carbon-rich materials such as cardboard, and harvest from the bottom. This is fantastic news for anyone who has trouble moving big objects, albeit you will need to be able to stoop or bend down to harvest worm compost.

There are no size differences; it’s a one-size-fits-all method, with this size being XXL. The bag can handle 3-4lbs of kitchen trash PER DAY once the worm population has grown to a maximum of 6lbs or even more for the size of and circumstances in the bag (this will take a long depending on where it is located since temperatures play a significant impact as well as how many worms you start with).

The Best Worm Composters Buying Guide

Why Buy A Worm Compost Bin?

Worm castings are such a potent fertiliser that they are manufactured and marketed on a commercial scale — and they aren’t cheap. One of the benefits of retaining your prized worms is that you can make as much as you need for free.

Another benefit is that having the worms convert your trash into fertiliser rather than sending it all to a landfill is considerably better for the environment.

Finally, if getting free fertiliser and naturally breaking down your waste aren’t enough, many people find that worm composting is truly enjoyable. Although worms are not as cuddly as a cat or dog, people can develop attachments to their worm colony.

Features To Look For When Buying A Worm Compost Bin

Is It Expandable

One factor to consider is whether or not your composter can be expanded at a later date if you want to grow the size of your colony.

Many tower-style composters can be made larger by adding one or more more trays to the top. This could be handy if your family develops and you start producing more waste, or if you just need extra worms to deal with the waste you presently produce.

On the other hand, some composters are one-size-fits-all, and the only way to expand your composting operation is to purchase an additional composter. This means that when you buy, think about whether you’ll need to expand your capacity afterwards.

Ease Of Maintenance

Most worm composters are simple to set up; in fact, most of the time, all you have to do is lay down a layer of bedding, add the worms, and begin feeding them.

However, once your worms are established, you’ll need to know how much time and effort you’ll have to devote to caring for them each week.

With some models, all you have to do is toss your trash in the top and, when needed, remove the castings and leachate from the bottom.

Other models, particularly tower-style composters with many storeys, will require you to recycle the tower’s “floors” in a cycle. While this may not involve much effort at first, you may find it to be a chore once you’ve done it several times.

Ease Of Harvesting

The ease with which the castings and “worm tea” can be harvested is an essential consideration. Commercial composters have an advantage over basic home-made composters in a bin in this regard.

If you use a bin, you’ll have to empty it every time you want to get to the bottom castings. This will necessitate upsetting the worms and possibly manually sorting them out.

Commercial composters offer a significant advantage in this regard, as they are designed to make collecting castings and draining the “tea” considerably easier. Consider how the castings are harvested, how simple it is, and how little it disturbs the worms when purchasing one.


Drainage is also a critical component of the composter’s design. This is due to the ease with which the leachate can be syphoned off, as well as the manner in which the leachate is drained to maintain moisture levels.

The greatest composters include a unique tray at the bottom that collects this healthy “tea” and allows you to drain it fast and conveniently using a faucet that is specifically designed for this purpose. This is also something to think about while deciding which composter to buy.

It’s also important to remember that the optimum worm environment is moist but not soggy. The worms can drown if it’s too wet, but they won’t enjoy it if it’s too dry, and they might even die.


Another key thing to consider is the composter’s capacity, as well as whether or not it can be changed.

The majority of composters will inform you how many worms they can hold. Red wiggler worms can process half their body weight in waste per day, therefore a pound of worms can break down half a pound of leftovers every day.

You may calculate how much waste your household produces each day and how many worms you’ll need to cope with it all using this information. This should assist you in selecting the appropriate composter.

Depending on your needs, certain composters may hold varied volumes of worms and garbage. If you don’t need to dispose of big amounts of garbage, you could utilise simply two layers instead of all three or four in a tower-style composter.

Dimensions and footprint

The composter’s size is certainly a crucial factor to consider, especially if you want one for inside your home.

By stacking vertically, tower composters have a smaller footprint. If you have a small amount of room, this style may be the ideal option for you.

Are you going to be using it indoors or outdoors?

You must also decide whether you will do your worm composting inside or outside. Some are intended for use outdoors only, while others can be used both indoors and outdoors.

Worm Compost Bin FAQs

How many worms do I need to start my composting bin?

Most manufacturers specify how many worms to start with in each bin, but most composters require around 1 pound of worms, which is roughly 800 to 1,000 worms. Worm populations self-regulate based on available space and food, so you won’t have to do anything to keep them under control. In a worm bin, worms can live for up to a year. When they die, their bodies, which are composed primarily of water, will be composted.

Where should I put my worm composting bin?

If you have the space, you can put it indoors, but keep in mind that worms may escape from some types of composters if the conditions aren’t right, such as if it’s too damp or too dry. If you’re nervous about finding a few escaped composters on the floor (it’s not usually a mass exodus), store your composter outside or in the mud room. Keep curious pets away from the table to avoid it being knocked over.

What should you not put in a worm compost bin?

Worms, like you, prefer a diversified diet! Raw chopped fruits and vegetables, eggshells, coffee grounds and filters, napkins, tea bags, and shredded paper are all acceptable ingredients. To maintain a healthy ecosystem, worms require approximately 50% food scraps and 50% fibre and paper.

Never put rotting food in your garbage can since it attracts fruit flies (and worms dislike decomposing food). Fruit pits, lipids, dairy, and meat items should all be avoided. They also have trouble with rigid stems, onion’s papery outer layers, and too much citrus waste, such as orange peels (limit it to around 20% of what you add at any given time).

Do worm compost bins smell bad?

No, not if you do it correctly! They may have a mild earthy odour, but if they start to stink, you have a problem. To begin, bury your food in the bedding and keep it moist, but not sopping wet, like a damp sponge. If your worm bin appears to be dry, softly mist it with water. Also, don’t throw in more leftovers than the worms can use in a few days; it may take a few weeks to figure out how quickly they consume a handful of scraps.

Finally, large chunks of foul smelling vegetables like cabbage and onions, as well as full banana peels, may be unpleasant on their own; cut them into little pieces and use sparingly.

Troubleshooting worm composting problems

Fruit flies have infested your worm bin: If you’ve ever kept compost on your kitchen counter, you’re aware of how easily a fruit fly infestation may occur. Prevention is essential. Make sure the food waste is well covered under the bedding, that it is chopped up into little bits, and that nothing is left to rot in the bin.

If your composter begins to stink, dig through the bedding and remove any food waste that appears to be decomposing. The worms should consume everything before it moulds, but they may leave things to soften. For example, they are unlikely to consume an entire fresh banana peel until it begins to break down and soften. Cutting up larger chunks will allow them to process food more quickly. A foul odour can also indicate a moisture problem. Too much decomposing garbage can generate a lot of humidity, soaking the bin and making it a touch too damp for the worms. To help balance things out and return the bedding to a spongy moisture level, add some dry cardboard and paper bedding.

Worms are crawling out of the bin: It’s typical for a few worms to escape, but if you have a large number of escapees, you may have an environmental concern. Moisture, temperature, and potentially pests are all factors. Add some water if the bin is too dry. Add more bedding if it’s too moist. Examine the top layer of bedding for bug larvae or other problems.

There’s an infestation: Other creatures will occasionally enjoy the moist, dark atmosphere of the bin, even if it’s merely to lay their eggs. Take the bin outside if you see insects, eggs, or even hairy critters, and collect the castings. This is an excellent time to clean out the bin and dispose of any rotten food or old bedding. Begin again and reintroduce the worms to their environment. If you had a mouse invasion, use bungee cords or boulders to keep the lid in place.

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