Worm Farm Instructions

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Worm Farm Instructions

How To Care For Your Composting Worms

There are FREE Basic Written Instructions on this page

Just scroll down a little to see them

But first I would like to tell you a little about my FREE Guide that you can download

It has a LOT more information in it than what is on this page

FREE FAQ Guide To Worm Farming

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About This FAQ Guide:

This guide is FREE – OR “donation based”. (Donations are in US dollars)

Put your donation amount (or zero) in the price box, then click “I Want This”.

If you want to donate some money for a “cup of coffee”, that’s great – and thanks! Just put your donation amount in the payment box

If you want to take the guide for free, that’s ok too – just put the number zero in the payment field.

Free Worm Farming Instructions:

“The most common errors are over feeding, under bedding, not enough airflow and too much moisture.”


Temperature / Location Of Your Worm Farm:

*** MOST IMPORTANT: Worm farms MUST be kept in a cool shady spot – if the worms get too much sunlight or heat in a day you may kill the worms.

How to start off a multi level worm farm you bought from the shop:

Click Here To Watch My YouTube Video About This


Basically follow the manufacturers instructions to assemble it.

The only thing to question/ignore in their instructions is HOW MUCH to feed and HOW MUCH water to put into the farm.

Some of the systems aren’t giving good instructions.

Feeding – What to feed and what not to feed, how much and when and food preparation:

Click Here To Watch My YouTube Video About This


Amounts to feed:

Feed an amount of food equal to the weight of the worms ONCE A WEEK. Add new bedding (detailed below) underneath each feeding.

On the internet there are some wild claims about how much worms will eat. Some say they eat their weight every day, but this is in perfect climate controlled conditions, and includes the bedding they eat as well. Within reason you cant add too much “bedding”, and too much wont hurt them as such, but adding too much food WILL kill them. If in doubt, just put more “bedding” type stuff in occasionally, like leaves, old grass, torn up newspaper and cardboard etc. Worms actually feed on the bacteria and very small particles decomposing in the compost.


Where in the farm to feed:

Its a good practice to put the new food up one end of the tray, then the next time you feed them feed up the other end of the tray. Don’t feed again until the 1st lot of food is gone etc. This way you can keep an eye on when they finish the oldest food, to then feed again. Some rotate the feeds around the farm in a circle, some feed like the spots on the 5 on  dice. This rotation of food ensures the juices from the feeds are in different spots, not always soaking one area of bedding. Even when you SEE the food is gone, the worms will still be feasting on small particles and the juices that seep into the bedding.


How to feed:  

When feeding, scrape back a little of the bedding, put some new dry bedding in the hole (ALWAYS add new bedding under food) – put the food in, apply buffers (lime etc) and cover the food with the bedding that you scraped back at the start. This helps keep fruit/vinegar flies and other pests off the fresh food, helps reduce smells and aids the compost process too.


When to feed again:

Feed the worms once a week, but don’t feed again until you see the food from 2 weeks before is gone.


Preparing food:

Cut the food into smaller pieces – eg don’t put a whole apple in there, chop it into a few pieces to let the composting action start better. Some people like to freeze the scraps first then thaw them before they feed them. This breaks down the food quicker, but also kills fruit fly eggs that are in the skins – handy if you have the worm farm inside. Some blend the food to allow the worms to eat it quickly, but this is not necessary. I myself do not blend or chop scraps finely. At most I will split apples into 4, or cut a banana in 2 pieces to open the flesh to the worms.


Foods they LOVE:

Common kitchen scraps, raw and cooked, like pumpkin and watermelon (their 2 favorites hands down).

Fruit and vegetable scraps (look on the DO NOT FEED LIST)

Tthey love bananas and mangoes skins and all (but not citrus/pineapple), small amounts of cooked rice or pasta without sauce are ok. Bread is ok but needs soaking first as it goes dry and mouldy and takes a while to break down to where they will eat it. Foods to be careful of: Grains such as oats, wheat (incl. flour), rice and pasta, chicken feed etc need to be used sparingly – too much of these will cause sour crop disease and kill your worms. A lot of things WILL heat up when made wet and placed in the farm, so be careful of putting ANYTHING in large quantities in the farm. Moderation is best.


-meat/dairy – in a small farm it just causes too many issues – it attracts blow flies and it smells.

-onion, tomato, citrus – they contain things the worms don’t like and may cause issues if over fed in a small farm.

-especially not pineapple or pawpaw/papaya, as these contain enzymes which soften meat like in a marinade – it may kill your worms.

-I have heard that sometimes worms don’t like mushrooms (we don’t eat them so I don’t know)

-Pet manure. Its just yucky. The exception to this is if you set up a special pet manure composting farm(I can help with this) – but there are special considerations with this. Ask me if you’re interested.

– Animal manures – horse manure, despite what they say on the internet is now deemed unsafe for worms due to de-wormers. Chicken/bird manure is considered too hot for worms. There is also the danger of pathogens, especially if the manure hasn’t been properly hot-composted.

I would advise not to use ANY manures in a worm farm – I use NO manures.


Bedding: What to use and what NOT to use, why and how and when to use it:

Click Here To Watch My YouTube Video About This


Why do we add bedding to a worm farm:

Too many scraps alone will overload the system, and the worms need bedding as well as food. Paper and cardboard are GREAT bedding materials, and also breaks down into food, while the kitchen scraps are pure food. If in doubt feed more bedding, rather than food scraps. If you feed either end of the box in turn each week, you will get to see when they have finished the stuff you gave them 2 weeks ago and can feed more.


When to add bedding:

With every feeding. Try to feed paper products and leaves/grass in proportion to the kitchen scraps – as “bedding”, UNDERNEATH the kitchen scraps. Use it dry if your farm is ok for moisture, if your farm is a bit dry you can moisten the new bedding. If you forget one week, put more in the next week.

What to use as bedding:


Paper & Cardboard:

While there is a lot of info on the internet both ways, I prefer to never use glossy or waxed papers/cardboard in the worm farm. Only use newspaper, (it’s ok to use colored newspaper), non waxed non glossy cardboard, egg cartons, toilet rolls, etc. Newspaper can just be hand torn into strips, and cardboard only needs to be torn up to 10 to 15 cm square chunks.

Grass clippings:

Grass is almost a “food” too, so don’t add a whole bunch of it at once. You need to use old/dry grass, as fresh grass heats up too much as it dries out and starts to compost, and may kill the worms. I find in Bisbane, a pile of grass is usable for worms in about 2 to 4 weeks. Never COVER a farm in anything you add, as things CAN still heat up. Put new things at one end only and wait until the worms go into it themselves, then you can put some up the other end etc.


Coco Coir & Peat:

Again there are a lot of opinions out there. Personally I don’t like coco – it costs money and its hard to tell when it has turned to castings as it LOOKS like castings. Use the stuff you got with your farm if you bought one, just don’t buy any more. Peat is bad as it is quite acidic in nature, and can harm your worms unless you buffer the acidity well with lime etc. Peat also costs money and can’t be easily distinguished from castings. NEVER put European Night Crawlers in peat – these worms often dont recover from sour crop disease, so dont risk it.


Moisture & moisture control:

The bedding should be as moist as a wrung out sponge – you should be able to squeeze a handful of bedding and have 6 to 10 drops of water to a small trickle of water come out of it. Err on the side of too moist – it wont necessarily hurt them to be too moist but too dry will harm them as they need moist skin to absorb oxygen.

Adding too much moisture is bad. Also too much – some say ANY – leachate (“worm wee”) in the bottom of a worm farm is bad – it indicates you’re adding too much moisture.

Quite often (every 2 to 3 days at most in summer) check your farm, ensuring that the bedding is moist, and the carpet on top is moist/wet. Quite often the action of wetting the bedding cover (carpet/newspaper etc)  continually gives enough moisture to the bedding, but just check it.

Covering on top of worm farms (good in winter or when it’s dry – but can be bad in summer) 

Some farms come with a “blanket”. Some say to use an old piece of carpet. Some say to use a couple sheets of newspaper. All these are ok to help retain moisture in the farm, mist them with a spray bottle to keep moist. The worms like a covering on the farm where possible, it helps them stay at the surface, by keeping the light out and providing a feeling of security from surface predators. Eventually they eat the covering, even the threads on the bottom of carpets.



ANY coverings also retain heat in the farm, which is great in our winter, but when it gets hot in summer, i like to remove solid coverings – until the blazing hot high 30’s and 40’s (Celsius) I will substitute dry newspaper strips as a cover, which still provide covering but allow more air entry. When it gets really hot i remove all coverings.


Air and cooling the farm:

Worms need air to survive especially when hot. If you’ve made your own farm, often people don’t put enough air ways for the worms. I advise AT LEAST 2 holes 10 cm x 15 cm. Drilling small holes just doesn’t work.

Adding water to a farm only makes matters worse as it conducts heat and replaces air in the bedding. Two ways to cool a farm: other than placing it in a cooler spot are: -place a hessian bag over the farm, and moisten it. As the water evaporates it cools. You can also hang the bag into a bucket of water on the sides to keep it wicking water up and cooling while you’re not there. – freeze plastic bottles of water. Place them in the farm, rotating each day or as needed with a new one from the freezer.

Worm farm “conditioner” / Ph buffer / Lime – what does it do – and what IS it anyway?


Click Here To Watch My YouTube Video About This


Conditioner, sometimes called Ph buffer (usually a sort of “lime”, shell or rock dust), is added to control acidity in farms, supply grit to the worms to help digest their food, and add minerals to the worms diet. The decomposition process is acidic, and some foods are slightly acidic. This can build up in the farm and worms may die. They die from what is called “Sour Crop Disease” aka “String Of Pearls” aka “Protein Poisoning” (which has nothing to do with FEEDING the worms protein. Also, often a slightly acidic farm will attract and allow pests to breed, such as mites, pot worms, vinegar/fruit flies etc.

Ph buffers are a good preventative (i sell one of them in small amounts, in a handy shaker) – prevention is better than cure.

Types of buffers:

  1. Safe lime to use is called “Garden Lime” and is a ground stone – usually limestone or chalk.

    UNSAFE LIMES are slaked or hydrated limes – these will burn the worms.

  2. Dolomitic lime is also safe – but is higher in magnesium than garden lime. If your soil is already hard, the magnesium will make it harder. Avoid dolomite if so.
  3. Ground eggshells work great if you can get enough shells and can be bothered grinding them (the grinding increases the surface area)
  4. Oyster shell flour (ground up oyster shells)
  5. Rockdusts such as zeolite or azomite

(Click Here To Read More About Zeolite)


How to apply buffers:

I like using a home made shaker (i have these with the conditioner ready to go) – but you can just use your hands, but it is a little harder to control amounts.

Just put a light dusting of the buffer on the top of the bedding, as if you’re flouring a bench to roll dough – then water it in a little if you need to add moisture to the farm.

If you don’t need to add moisture, just mix the lime in a little with your hand or worming fork – if you leave dry buffer on the surface it may hurt the worms a little by drying out their skin etc.


PH Testers:

You may want to use a garden PH tester to see you’re in the ideal range of 6.5 to 7.5 (buffers increases the PH number, making it less acidic) The worms PREFER the bedding in this PH range and do best within it. You can buy a PH tester (pen type) for about $10 – but imho these are worthless. If youre spending less than $200 to $300 on a soil Ph tester, it probly wont give you accurate readings. Better to use on eof the old fashioned testers with the dye and white powder.


Precautions on flooding:

In store bought stacking worm farms, a common mistake is not emptying the liquid collection tray often enough. The farm then floods.

I prefer to leave the tap OPEN in such farms and leave a bucket under it so I know it’s not flooding without having to lift all the levels off to check etc.

Tools to use and which ones to avoid in your farm:

The best tool to dig around in your farm is one of the little gardening hand forks, the ones with 2 or 3 blunt prongs. A spade or hoe type will cut the worms up. (I also sell the little forks)



If you have any questions, please just call or email me, I am happy to help.

(Click Here To Go To My Contact Page)


I also sell complete worm farms, for different uses, such as raising bait worms, pet manure composting, or garden bed feeding stations to encourage worms into your gardens. These all have bedding included, but worms for these are priced separately. Please call me to ask about them.

(Click Here To Go To That Page)


Thanks and happy worm farming !!!




Brian Donaldson

[email protected]


0419 419 572



          Also Available:

+ Worm Farm Conditioner/PH Buffer – 750 grams in shaker $5

+ Worm Farm Mini Rake $5

+ Complete Worm Farms For:  -Compost Worms

 -Bait Worms

 -Worm Feeding Stations For IN The Garden

 -Pet Waste Composting









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