Build a Worm Tower

Host: Leonnie Shanahan. More info: www.ecofilms.com.au

Mrs. Homegrown here:

One of our commenters on the compost debate, Nick H., offered up a link to a great video about worm towers, so we thought we’d share. A worm tower is a wide (at least 50cm dia.) pipe sunk halfway into the ground, with access holes on the lower half to allow the worms to come and go. Food and bedding is dropped in the top, which is kept capped.

We happen to have worm & compost expert Nancy Klehm staying with us this weekend, and she explained to us that this particular technology makes a lot of sense for hot, dry climates (note the video comes from Australia), because it’s sunken and it allows the worms to distribute themselves in the cool soil during the day. Conversely, I can imagine this wouldn’t be such a great thing in rainy climates as it could easily flood.

Nancy told us the worm holes clog up, so you do have to remove the pipe for cleaning fairly regularly, and perhaps take that opportunity to reposition it. I imagine that’s when the casting harvest would occur, and harvest promises to be a pretty messy process. 

The video speaks of using PVC pipe for the tower. PVC is cheap and easy to work with, but it’s pretty well established that it leaches toxins as it degrades, so you might want to seek out pipe in other materials. As an aside, we used to use PVC pipe in our self-irrigating pots, still still have PVC in some of them, but are phasing it out in favor of metal or bamboo pipe. Yet we still have PVC lines as part of our irrigation system. This is something you have to weigh and decide for yourself. 

Once Erik dragged home a section of ceramic sewer pipe he found in the street. It lingered in our yard for years, and was finally returned to the street. Now we’re singing the pack rat’s lament (See! See what happens when you throw things away!), because it would have been perfect for this.

On first glance I’d characterize this system as a novel idea, one which is worm-friendly, and best suited to hot, dry climates. It looks convenient to set up and use, but probably not the best system to use if you’re primarily interested in the castings.

If we can find another length of sewer pipe we’ll try it out and report back.

So I had this dream

Here I am, with the soon-to-be-forgotten worms and a fantastic class of Waldorf kids

Mrs. Homegrown here:

So last night I had this dream that I was sitting at a kitchen table with someone (don’t know who it was) and I noticed something that looked like a dried out worm coiled on the edge of one of the dishes. I pointed it out to this other person, and she reached out and crushed it with her fingertip. It crumbled to pieces on the tabletop. I laughed and said, “I sure hope that’s not one of my worms!” She laughed, too, and mischievously blew the crumbs in my direction.

And thus does one’s subconscious work. I woke with a start, remembering that, after showing off my worms to class of visiting school kids, I’d left the bin out on the back porch for a night, and day, and half of another night. Usually the worms live in the kitchen. I jumped out of bed and brought them back in.

The problem with worms is that they’re so darn quiet.

The worms are fine. They’re tough, and our weather is mild. But I was a little worried about them  because they are house-worms, acclimated to room temperature, and I’d left them out in the open, on concrete, and in a shallow bin.

See, worms can take care of themselves just fine if given the room and resources they need to cool themselves down, warm themselves up, and regulate their moisture. However, when they’re in a shallow little bin, they just don’t have much latitude for adjustment. It’s our responsibility as worm keepers to regulate their environment.

Luckily for us and our forgotten worms, even though it was unseasonably warm yesterday,  the sun is low on the horizon, so our back porch wasn’t baking in the western sun, like it does most of the year. Otherwise, the worms, being unable to hide deep in the soil, might have steam cooked in the bin during that long, forgotten day. 

Of course, worms can be kept outdoors in all but the most extreme temperatures, but their bins need to be sited correctly–kept in nice shady spots, protected from the rain, and elevated from cold-conducting cement surfaces. (Maybe some of you folks who live in snow country could chime in on what you do with your worms when it’s freezing out?)


Wonderful Worms

 I’ve been composting with worms for many years now and I am continually impressed by how good they are at what they do- eat our garbage. 

For those who want to start a worm bin of their own you can either buy a bin or make your own. I must say the black, stacking bins made from recycled plastic work very well. They are well designed to allow for a lot of waste in a small footprint and provide good drainage, which is absolutely key for worms. I’ve also made my own bin and I’ll write about that in a separate post. Target has also come out with a fancy worm bin they call the MIO(I’m not sure how to make the link work so you’ll just have to look it up) . I’m incredibly jealous because I wanted to be the first to come out with a snazzy, hip worm compost bin. The Target bin is cute but unlike other prefab bins it is not made from recycled plastic. I still kind of want one. 
Mr. Homegrown has encouraged me to share my failures because apparently readers of this blog love to hear about projects gone awry. I’ve only had one problem with worms but it was a doozy. I had been composting with worms for several years without a glitch when I got overly enthusiastic and threw everything off. There is a local juice bar that doesn’t compost. All that lovely, ground up juicing waste just ends up in the trash. So I decided to take home a big bag- maybe twenty pounds of ground up carrots, wheatgrass, apples, kale and whatever for the worms. I spread it out as a layer in one of the bins. Several days later I noticed flies. I opened the bin and there were all of these hideous larvae crawling around. Now I love worms, but larvae are just gross. They were some kind of fly larvae. I screamed and jumped up and down shrieking for about 5 minutes. I closed the bin and decided to wait. Composting is all about balance. I knew I had thrown off the equilibrium of my worm composting system. After about five days of just letting the bin do its thing I started by slowly adding just my morning coffee grounds. I put down a thick layer of shredded newspaper to keep any more flies from getting in. After about two weeks I had restored the balance, the larvae were gone and the worms and I have lived happily ever after.

Worm Composting

Today’s tip comes from neo-country singer and South Pasadena-by-way-of-Texas resident Corey Travis (web site under development). Corey brings up the topic of worm composting, suggesting a book called “Worms Eat My Garbage” by Mary “Worm Woman” Applehof. Now we haven’t read this book, but having tried worm composting you will definitely need some advice either from the “internets” or from a book.

We tried worm composting here in the compound garden a few years ago and found the process somewhat difficult. Unlike our present lazy composting methods, worm composting requires a certain amount of time and effort. When you start a worm composting system you are acquiring pets – worm pets, that need just the right amount of water (too much and they’ll drown, too little and they will be unhappy), and food (if all your meals are at In and Out Burger they won’t get enough grub or if you are some kind of hippie vegan they won’t be able to keep up with the waste). You must also sift and separate the worm casings from the worms themselves from time to time. One advantage to worm composting is that you can theoretically locate the worms under your sink, providing a close destination for disposing of your kitchen scraps. However, you can find yourself with unpleasant smells and fruit flies if you add too many scraps for the little buggers to digest. We had problems maintaining the correct moisture level in the bin and ended up drowning a bunch of the hapless critters when we accidentally left the worm composter out in the rain. In the end we released our worms into our large compost pile, where they live very happily, occasionally humming the tune “Born Free.”

There’s been some grumbling that SuriviveLA has not offered any advice to our apartment livin’ brothers and sisters. Worm composting is an excellent an option for apartment dwellers looking to recycle their kitchen scraps. The whole set up is isolated in a plastic bin which can live in the kitchen or in a cool, shady spot on the balcony. The worm castings (poop, if you will) are odorless and make an outstanding fertilizer that you can use on your own potted plants or give to friends with gardens. Believe us, they will be very happy with your gift of worm poop. Do not let SurviveLA’s failure discourage you from giving this excellent technology a try. Just be sure to study up on it first.