DIY Tumbling Compost Bin
I always wanted one of those fancy tumbling compost bins, but they cost a fortune – well over $300. Making compost shouldn’t cost that sort of money! There had to be a DIY option.
Quite a while ago (like, 8 years ago!), I was buying some lucerne for the garden at the feed store at Albion Park Rail and I noticed they had a few large PVC drums stacked in the corner. I asked about them and they were waiting to be recycled, so I bought one for $25.
It was a struggle to fit the barrel and the lucerne bales in my little hatchback car, but I managed to get the lot home. I drilled some holes around the barrel to let air in and water out. About 5 mm holes are pretty good – much bigger and you’ll get pests in there and compost will fall out.
Using the DIY tumbling compost bin is dead easy. You just fill it with lawn clippings, manure, stable sweepings, leaves, comfrey, and garden prunings put through a shredder. I don’t put strappy leaves or twigs or long grass in there, as they tend to tangle up into a ball and don’t break down very quickly. Chopped up or shredded, though, they do fine. I also get the waste coffee grounds from our coffee machine at work – these are high in nitrogen and excellent for the compost (plus it’s diverting them from the waste stream). Paper from the office shredder is a great carbon source, too.
It’s usually a good idea to add a bit of lime, blood and bone, and a shovel or two of fresh compost to seed the bacteria and micro-organisms. Then give the lot a good watering and seal the lid.
Every morning and evening, I roll the compost barrel around the yard a bit to mix up the contents, and add a little water if it’s getting too dry. It just sits in the sun all day. For the first week or so, the compost gets really hot – so much so that it often steams when you open it. This is great, as it kills off any seeds and pest eggs that happen to be in there.
The compost only takes a month or two to mature, depending upon the materials you started with. If you don’t get the carbon/nitrogen balance right, don’t keep it moist, don’t mix it up regularly, or don’t start with well-chopped ingredients it will take somewhat longer.
The thing I like most about the DIY tumbling compost bin is its portability. You roll it to where your ingredients are when filling it, and once it’s done you roll it to where you want to empty it and just tip it up.
I’m now busily trying to make as much rich compost as I can over the winter, so I can top up all the garden beds and be ready for spring. I’ve been using this compost barrel for about 8 years now (yes, the photo to the right is that old!), and it’s still going strong. I bet if I’d bought one of those $300 commercial tumbling compost bins it’d be broken by now!
One thing to note – if you’re going to use a drum or barrel to make compost like this, find out what it has been used for previously. Mine is an old olive barrel that had also been used to store horse feed. You definitely don’t want to use one that has been used to store chemicals, oil, or some other nasty substance.
Update: An Illawarra supplier of these types of barrels is Drum Master.
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Gardening is so relaxing and a wonderful way to spend time outdoors. It is one of my
favorite hobbies that I love to share with others online! Thanks for taking the time to
write this post, I always learn so much about gardening from many different sources online!
sounds amazing. I admit, I’m sceptical to think that it might work, but it seems it does! We just bought another rain barrel this morning; perhaps I’ll go and get another one to use as a tumbling composter!
Glad it’s working out for you.
@Mrs Green: Yep, it works well. It’s exactly the same as a tumbling composter, just without the frame for rotating it. I like it that way, though, as I can move it around the yard and it doesn’t take up as much space. I have seen people mount these or 44 gallon drums between posts so they’re more like the commercial tumblers, but then they’re pretty much in a permanent position.
Thanks for the detail! I’ll definately keep an eye out for a barrel like this and give it a go. Cheers, Tricia
G’Day Darren, I recently found your blog and have been reading through it with interest. I grew up around Wollongong/Shellharbour but now live around 3-4 hours west.
Your take on the tumbling compost bin seems to be a good cheap alternative to the commercial equivalents. I recall seeing some of those plastic drums for sale but can’t remember where.
I have two commercially bought plastic compost bins but have been very disappointed with the results. Part of the problem is probably my own incompetence in mixing the right ingredients, but I also find it hard to turn over the contents due to the height and the shape of the bins. It is also difficult to access what little compost IS produced through the little sliding doors at the bottom. There’s barely enough room to get the spade inside, so extracting it again with a quantity of compost is very difficult.
I am now considering using the current contents of the bin (even though it has not completely broken down) as the bottom layer in a no-dig garden; maybe even digging it into a trench. Hopefully that latter approach will help to partially deal with the heavy clay soil in my garden.
Regards Tim
What a great tip, I bought one of those tubs recently because it looked good for water storage but haven’t done anything with it. I think I will definitely turn it into a tumbler. Thanks Darren
BTW Enfield Produce in Sydney have them for about $18
@Tricia: Let me know how it goes if you try it!
@Tim: Great to meet you! There’s some good stuff going on locally here now. I have a couple of those traditional plastic compost bins as well. I tend to use them as a batch system, filling one up then letting it sit, while starting to fill the other. I’ve also got a metal corkscrew-type device that you screw down into the compost, then pull up to mix and aerate the contents. It’s fantastic, and really helps the heap mature properly. Without it, mine were just turning into a damp, smelly, slimy mess. They’re a lot better now.
@Deb: Thanks for the tip on where to get them! Should be good for Sydney readers. Post on your blog if you convert it into a compost bin – I’d be interested to hear your experiences.
Wicked Idea that all i would like to call this idea.Thanks for sharing with us . Regards Sudeep
Darren, I think you’re not only a vivid garderner/eco-greener, but you’re also a smart man, especially with it related with the money matter! Go figure, with the $300, you can buy 12 large PVC drums!
@Wilson: Thanks
. $300 buys a lot of plants for the garden!
[...] vulnerable to the chemicals in bath products and in the environment.” Darren Collins presents DIY Tumbling Compost Bin posted at Green-Change.com. Darren says, “Tumbling compost bins are a great, fast way to make [...]
Darren, I thought that worms were a key ingredient in any successful compost bin. This is the first year we’re giving it a sincere effort. We have a free standing compost bin that has been in our yard–empty–for 8 years, and want to do our part to “green up” our methods. Our house and the park across the street from us are the backdrop for many a wedding picture this time of year; we know we can do better if we’re recycling nourishment back into our soil.
@Johnnymac66: No, worms are not a key ingredient for composting, although they can be incorporated as an ingredient in some composting approaches. This particular method is hot-composting, where bacteria and microorganisms do the hard work breaking vegetable matter down for you. It’s rapid, but you need to keep the air, water, nitrogen and carbon ratios right for it to work, and the ingredients need to be chopped up small so each particle has large surface area and small volume. Using a worm farm is another effective approach, as is a cold compost pile that will likely involve worms eating some of the organic matter. These tend to take longer, though.
[...] speaking of gardening, read about their inexpensive do-it-yourself tumbling compost [...]
Hi Im new to gardening and am focusing on my garden staying organic, I would love to make a compost bin and like your idea, can you just have one barrel or do you need at least two so your not adding new produce to the already composting material? or do you just take whats composted on the bottom and put that on your garden? does it matter if you put heaps of grass clippings in there?
@amy: This type of compost bin is best to do in batches, preferably with the material shredded or chopped into fairly small pieces first (like lawn clippings, manure, shredded leaves and prunings, etc). That way it will heat up well and break down quickly. I use a normal cold composting bin for kitchen scraps, since we have a low volume but constant supply of them. That said, running two at once should work fine for what you’re after. I put all my grass clippings in – they’re high in nitrogen, so make sure you balance them with some carbon like dry leaves or sawdust.
Cool thanks Darren, Im looking forward to it
Very good Article! I will do the same! I might hoist the drum up on a framework, so that I can tumble the compost easier (with ballbearings). Lets see how much this will increase costs… Do you put any compost worms into the barrel or does it get too hot for compost worms?
@Philip: Go for it! I’ve seen people drill holes in either end of the barrel and put a pipe through so they can mount it horizontally off the ground between two posts (a bit like a pig on a spit). They then use a jigsaw to cut a square door out of the side of the barrel, and attach it back on with hinges and a catch. Looks good. No, I don’t put worms in the barrel – like you guessed, it gets too hot.
Darren, thanks for the feedback! I ordered the drum already and am in the prozess of researching the best/easiest framework. Maybe I’ll blog about it, when it finished…
@Philip: Let me know if you do! I’d be interested to see photos of what you end up with.
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