Start your own worm farm: why every family should get worms

by Mia Cobb

Yes, worms. I honestly think you should start your own worm farm. It’s character building. Here’s why: worms break down organic matter and remove contaminants, leaving in their place a nutrient-rich, water-soluble, organic fertiliser and soil conditioner. Worm farms and living compost-specialist worms are available for purchase at most nurseries and hardware stores.

How it works

You set up the worm farm (I have one made of four tiers that the worms can choose to move around). You put in your worms (specific composting worms, not just regular earthworms – you’ll probably need 1000 to get started – they’re usually sold in boxes of 500 or 1000). You put in your scraps. The worms eat the scraps, then poo out magic castings that are like garden gold. As the tiers fill up, you add a new one and begin to fill it up with scraps.

can-o-worms2The worms move upward as they process your waste. Over time, you can take the lowest level tier, empty the castings for use around the garden (dig them in and/or dilute with water and sprinkle around via watering can), then add the now-empty tier to the top and begin filling again. In this way, the tiers rotate regularly and the worms are constantly moving through the system. Kids love the process of feeding the worms, seeing the worms, seeing the food waste break down and change because of the worms.


Doesn’t it stink?

A happy worm farm doesn’t smell much at all. Mine lives in my carport (to avoid excessive heat in summer) and we never notice it when getting in/out of the car.

What worms like

Raw fruit and vegetable scraps. Skins, cores, soggy/bruised/mouldy bits from the bottom of the school bag, fruit bowl, or fridge vegie drawer. Tea bags and coffee grinds from the plunger (I often wonder if this gives our worms a buzz?!). You can even throw pet hair in! Food, green and paper waste make up about 60 per cent of our household waste, so using a worm farm to process your organic waste can make a significant difference.


What they don’t like

Onions, tomatoes and citrus should be avoided (a tiny bit is okay, but these are acidic foods, so keep it to a minimum). Steer clear of meat, dairy products and bread (most likely to putrefy and attract insects, particularly flies).

Keep your worm farm out of direct sunlight/heat. They prefer (and are most active) when maintained at 15–25°C. Add green waste (such as lawn clippings) sparingly, as these are quite tough for the worms to process and more likely to overheat the worm farm.

Traps for young players

Keep the farm moist, especially in the early days. You may want to use six layers of newspaper or the side of a cardboard box that you’ve soaked in water to lay on top of the farm to reduce evaporation. The worms will eat these paper-based products, so this is also a good holiday strategy if you plan to be away for over 10 days.

Watch the acidity of the worm farm. Scattering crushed egg shells or a small handful of garden lime every 3-4 weeks will help to keep the worm farm at a happy pH level for the worms, reducing mould growth, and also deterring insects.


BONUS: Get worms for your dog

Believe it or not, a worm farm can even process all the poo of your family dog. There’s one caveat attached: you can’t feed them anything else. Actually, maybe there are two because you also can’t feed them ‘fresh fodder’ for 5 days after worming your dog (because you are routinely giving your dog something to control intestinal worms, aren’t you?).

In my experience, the worms do a great job on a dog-do-diet, provided the poo is moist (that is, collected at least every 48 hours and not left to dry out). It saves putting the dog poo in plastic and then adding both to landfill.

More info

Gardening Australia

Costa’s Garden Odyssey

Information from a worm farm company

Reduce Landfill

Written By

Carolyn is the editorial director of Champagne Cartel and a freelance writer. In her spare time she is a long-distance runner, peanut butter enthusiast, and single mum to three incredible humans.


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