Bag Worm Composting Bin Version 2 - Easy Harvest with Fully Removable Zipper-Free Bottom

This is the gold standard of home composting—hands down. The Urban Worm Bag is not just a product, it’s a lifestyle shift. I’ve tried bins, totes, DIY systems—you name it—and nothing compares to this setup. From day one, I knew this thing was built with intention and quality. The fabric is strong, breathable, and holds moisture at the perfect level. The airflow is excellent, which means no smells, no overheating, and a healthy worm colony that’s thriving. The zipper access makes harvesting castings ridiculously easy—no mess, no stress. Just unzip, scoop, and boom: black gold. Setup was a breeze. Once you get your bedding layered right (shoutout to coir, shredded paper, and crushed eggshells!), the Urban Worm Bag basically runs itself. Add scraps, keep it moist, and the worms do all the magic. It's expandable, tidy, and looks good in any corner of the garage or porch—no gross plastic bins leaking mystery goo. This thing has become a core part of my garden ecosystem, my soil-building plan, and my daily rhythm. I check on my worms like a proud parent. If you're even thinking about vermicomposting—stop thinking. Get this bag. 10 out of 10. Would buy again. Will never need to. It’s that good.

Update 2021: I still love this thing. My worm population has grown substantially. The seam of my second bag split when I went to zip it up and while contemplating what to do next, the Facebook fan group said it was still under warranty. Amazing! I contacted Steve and he’s sending me the third version of the bag. In the meanwhile, I emptied my second bin (with much less worms as it takes that bin three or four times longer to process the same amount of food) into my first bin and now my first bin is full to the top. I’m thinking of leaving them there for maybe six months before splitting the bins again. When I emptied the bin, I put the contents into my first bin from the top, until I got to the layer that was more castings than bedding. I harvested two gallons of castings in this way. I normally harvest half a gallon from my first bin every three to six months (I started with only enough worms for a four gallon system). Worms are so expensive here in Hawai’i, there is no other item in my house that pays for itself like the Urban Worm Bag. While you can get away with not spending money on a worm bin, the time you save sifting castings is substantial and absolutely worth the time spent and strain on your body you mitigate. The volume of it considering is amazing, especially when you factor in the amount of space it uses. Let’s talk about Steve for a moment. Between his presence in the fan group, his blogs and YouTube channel, his quick response and excellent customer service, I can’t think of another owner that is so approachable, responsive and stands by his product. Considering that worm bins mitigate trash that could have ended up in a landfill and recycles valuable resources, I admire the guy quite a bit. On to practical advice. My little worm bins and my larger tote were all in plastic containers. The UWB is breathable cloth, so a new system (or a slow system, like my second bin that started with just 50 worms or so) is going to take some effort to maintain proper moisture. New bedding dried out faster than castings. I found my second bin would have dried spots of bedding in the corners, so I had to dig around and mix those spots frequently. My first bin got over the moisture issues much faster. This is the main reason I’m going to let my combined worms sit for several months before splitting. Feed in pockets and make sure to check the previous feeding sites (I feed using the clock to remember. 12, 3, 6 and 9). Feed when the previous site has a worm ball and the site before that is gone. Being cautious when feeding is important in a new bin, once the bin has been established (6-12 months), you can get more experimental. The bin should never smell anything but earthy. Any scents otherwise means you should cut back feeding. My worms were slaying their feedings, so I put a whole mini watermelon in there. Smelled awful in about a week. Only time that’s happened to me. I broke it apart and put some into my second bin and by the time I checked the following week, no smell. The first few harvests will contain worms. After that, it won’t. Just setting expectations. Why is this? You put bedding into the bin at first and it’s all at the same level of being processed. Worms wander around and leave cocoons. Those worms hatch and if the spot they’re at is moist enough, they’ll hang out. As the bedding is processed, you add another layer of fresh bedding with your food. Worms move up to follow the food. The higher layers are also larger and as they go down, they get compressed into a smaller area. So the layer you feed a few inches from the top will take a VERY long time to work it’s way to the bottom, unlike the first few harvests that started at the bottom. There just isn’t as much time for the worms to travel at first, but once the process starts, you’ll have worm free harvests. Especially if you open the bottom before you harvest and make sure it is running a little drier than the rest of the bin. I will absolutely buy a third one, at full price, once my other two are full. By that point, I’d be processing a LOT of produce and I’d probably be able to stop at three for my fruit loving household of four. Original 2019 review: I got my first worms two years ago. They are expensive here in Hawaii and illegal to import from out-of-state, so I got a handful from friends. I had visions of composting everything eventually, but my homemade tote was too big for the amount I had and other critters moved in. I scrapped that project and went down to a 1-gallon bucket. Easier to manage and I expanded to 3 buckets but harvesting was always a pain. I knew about CFTs and thought to make one myself. $30 for a sturdy enough garbage can, hopefully repurpose some pipes, but there's the time it takes, figuring out where to put it, when will I have time with two little kids.... Wheelie bins would have been ideal but ..... Anyway, as you can see, I've over thought the process for quite a while. And kicked myself for not jumping on the UWB2 when it was on sale for $89 on Prime day. Which is funny because there was an insane moment when I thought of getting the hungry bin two years ago. I think that's why I had it in my head to make my own. If I had known about the UWB, I would have thousands of worms already. So anyway, I ask Steve if he'll have another sale in a few weeks so I could be ready and he sent me a coupon. What a great guy. I bought it and it was so much bigger than I expected! So pleased! It was ridiculously easy to put together. In fact, turning it and pressing the joints in more over and over until they couldn't be pushed in anymore took longer than putting the pieces together. Also, I shred all the packaging to put in the worm bin, so no plastic waste. It's been going well. I live in a temperate area and I'm composting with blue worms. They're in the shade on my lanai. I followed the instructions for letting the moisture equalize for a couple of days before adding the worms, I Spritz the top every couple of days because the top bedding dries out in my location (did the same with the buckets, I don't get it since it's so humid here). I have no idea how hard or heavy it will be once there's castings to harvest, so I'll have to come back and edit once I've done that. But I'm looking forward to picking out as many worms as I do to harvest my little buckets. Oh, and this Prime Day (2019), it went down to $89 again PLUS an instant coupon. So, now I have two.

After my problems with the first version, the company quickly replaced my bag (excellent customer service) and I've been very pleased with the latest version (the 3.0, I think). Pros: *Sturdy stand (MUCH better than the original) *Very heavy duty bag material *Very roomy (I started the bin off with an existing 8 quart worm bin with about 2 pounds of worms and it just barely filled up the bottom couple inches) *The harvest panel is easy to access (the stand is about two inches taller than the original) and the liner keeps castings from getting in the zipper *The lid zips tightly and the double zippers make opening and closing easy Cons: None so far. The latest version is a huge improvement over the original, and the stand is nice and sturdy to hold the weight of the bag (I have it placed on a concrete floor and it does not wiggle when you zip and unzip the bag). The worms seem happy and, just like the previous version, there is tons of room for them to grow and multiply (the system can handle a LOT of worms!). Overall, with the new improvements I can definitely say that I recommend this sturdy, roomy, and well-designed new version for those who want to process a larger quantity of material. Original Review (Version 1.0): I’ve had my Urban Worm Bag version 1 for about six months now and I’ve harvested it twice. I had high hopes for this which were sadly not realized. Pros: * The construction of the bag itself is good and the bag is nice and sturdy and hangs from the frame evenly. * The top panel is easy to open and close which makes feeding easy and fast. * The surface area is great and provides lots of space for thousands of worms which process a lot of food scraps. Cons: * The construction of the frame is just plain cheap. Really, it was wobbly when I put it together and has only gotten worse as the bag has gotten more full and heavier. It has a distinct tilt to it now which is incredibly frustrating and disappointing. * Harvesting is a chore. It is very difficult to get the zipper open to harvest, and once it is open, harvesting requires crawling around on the floor to get your arm up in the bottom and get the castings out. Also, the space between the bottom of the bag and the floor is very small (less than six inches) so it’s hard to find a receptacle to harvest the castings into (I ended up purchasing a shallow litterbox to use for just this purpose). Also, due to the cheapness of the frame and its instability, you need to hold the top of the frame with one hand while you are trying to harvest out the bottom with the other which is not pleasant. Also, getting the harvest panel zipped again after harvest is nearly impossible. Overall, I have several other systems (storage bins, Worm Factor 360, etc.) and have kept worms for several years now and this is the only system I have so many problems with. It’s just not sturdy, and harvesting is a giant pain. This may be okay if you are are an experienced worm keeper AND are willing to upgrade the frame yourself, but for new worm keepers or those without the DIY skills necessary to alter the frame, I really cannot recommend this. Note: There is now a new version which supposedly has a different frame and harvest panel configuration, but I was not lucky enough to get one of those new models when I ordered.

I had seen this on a lot of American YouTubers videos and wasn't sure if it was sold in the UK but very much wanted one. I should have known that good old Amazon would have them. I was drawn to the idea of the simplicity of continuous flow worm farming and the compact design of the bag. I've been using a worm tower for about 18 months but found it a bit of a faff. Rotating the trays and the weight of the individual trays had become difficult due to health issues and took what seemed like forever to do to get castings plus the population of worms was increasing to the point that I had needed to use plastic storage boxes to house the overflow. After watching several worm farmers successfully use the worm bag and get good castings after a couple of months while never having to lift or move anything seemed like the perfect solution. I was surprised at how compact the box was when it arrived the day after ordering and on opening I was impressed at the quality of all the pieces. It comes with a helpful instruction booklet and there are many YouTube videos you can watch also on how to put together and use. It took me about 15 minutes to build on my own and although it's much bigger than a worm tower (about 4 times) it's still a compact design for a continuous flow system. I have mine in my conservatory as they are not suitable for outdoor UK weather but if you have a small house it would take up a lot of floor space and you might do better with a tower system. The worm bag has been running for a couple of weeks now and I'm really impressed with how easy it is to add bedding and scraps to. The worms seem to love it in there and make short work of whatever I add. I'm not expecting to get a usable harvest until next year and I have seen that a lot of people's first harvest can be full of unfinished stuff and worms but they just put most of it back in the top and the next harvest is proper castings because it is then running in top conditions with both microbial and worm activity in full swing. I'll finish off my waffling by saying that I would definitely recommend buying this wonderful piece of kit. It is well made and well thought out and I much more enjoy the process of creating goodness to add to my garden and allotment in this way. Top product!

The big surprise is the size. It doesn’t look too big and then you put in 1000 worms and some bedding and it barely covers the bottom. It seems to breathe well so the whole thing doesn’t get manky.

Es muy práctico y muy resistente!!

-Facil de armar -Buena calidad en los materiales

Arrived in expected time, easy to figure out how to install it. It has a good capacity, so far humidity etc has been easy to control. Am keeping Euros and Reds in the same one, they are both doing well. I freeze any vegies prior to adding to the bin to avoid introducing bugs such as fungus gnats or fruit flies that may have laid eggs. Make sure that you read up on vermicomposting prior to introducing any worms to your substrate.