Bookmark and Share

Do’s and Don’ts of Composting Worms

By Kristina Mercedes Urquhart, Urban Farm contributor

worms in compost bin

Photo courtesy of iStockphoto/Thinkstock

Worms can be picky, too!

While your compost worms can survive on a limited diet, the larger variety of food you provide them, the more diverse and nutrient-rich their castings will be. Not to mention, they’ll be healthier, too. Follow these feeding do’s and don’ts for safe vermicomposting and happy worms.

DO keep your "greens” (nitrogen-based) and "browns” (carbon-based) in check. Much like traditional composting, you can give your worms kitchen scraps, coffee grounds, crushed egg shells, plant waste, tea leaves and bags and veggie peels and cores (all considered "greens”), but they will need some "browns” too, such as shredded newspaper, copy paper, egg cartons and cardboard.

DO add more "browns,” if the bin is too moist.

DON'T feed plastic, glass, metal, foil, glossy paper or grass clippings from lawns treated with pesticides (or anything treated with pesticides for that matter!).

DO chop up large pieces of fruits and vegetables for easy work for your worms and faster breakdown. The worms actually eat the bacteria and fungi in decomposing food, so the older the food and the more exposed to air, the faster it will break down and get "eaten.”

DON'T feed fresh (or "hot”) manure to your worms. The heat from uncomposted animal manure will create too hot of a climate for your worms.

DON'T feed your worms pet waste.

DO keep an eye on where you place certain food items in the bin and how long it takes for your worms to consume it. This will help you get into a rhythm and learn just how much they need and when. Mark it on the calendar, or keep a worm journal with your list of garden chores.

DON'T overload the bin with food. Start with a small amount (about 1 cup every two days) for the first four to six months, depending on the size of your bin. Check frequently until you know how much the worms need and if the growing population needs more.

DON'T feed your worms foods that are very salty, oily or highly acidic (like fresh pineapple), dairy/meat products or seeds. Dairy and meat products will begin to smell quite rancid, especially if yours is an indoor worm bin. Also, seeds take a very long time for the worms to break down and they often sprout in the meantime!

DON'T make a staple out of garlic, onion or citrus. These foods may not appeal to your worms, so feed in small amounts.

DO take a whiff. If the worm bin begins to smell bad, you may be feeding too much.

DON'T worry about other bugs, such as fruit flies or vinegar flies, as they assist in the decomposition process, too. If the population is overwhelming, you may be feeding too much; try reducing the amount of fruit you feed. Alternatively, you can bury the food scraps under soil or brown matter, such as newspaper shreds. Ants appearing in the bin may indicate that it is too dry.

DO try new foods in moderation to see what they like. Worms can be picky, too!


Give us your opinion on Do’s and Don’ts of Composting Worms.
Submit Comment »
These are great Do's and Don'ts...we are an eco-friendly startup that's converting food scrap waste into organic worm castings and also creating BloomPucks. If anyone has any questions on vermicomposting or composting, feel free to reach out to us http://www.earthwormtechnologies.com or http://www.facebook.com/earthwormtec.

Here are a couple more pointers:
1) If you compost first and then feed that compost to your worms then you could include things like garlic, onions and citrus foods and your food recycling.

2) If you see other insect populations going out of control especially springtails or mites, then typically your bin is too wet (too much food probably or you're adding to much moisture), dry it out by adding some carbon (newspaper, cardboard etc.)

3) create a top layer of shredded newspaper that you can pull back and add food under, this will help with yuck factor and smell containment

4) Keep a look out for red mites - those are bad news...they are carniverous and will go after your worms

5) A big problem with the bin system is lack of oxygen so shaking the bin a bit side to side to aerate the bin will help decompose the food faster and keep an oxygenated environment so things don't go anaerobic and smell.
Earthwormtec, Stamford, CT
Posted: 7/18/2014 9:20:55 AM
Happy to be back on-line!!
Miss not being able to log-on the last couple of weeks.
Dante, Hyde Park, MA
Posted: 5/10/2014 2:57:41 PM
I'm brand new to composting, and it still feels a little overwhelming learning browns vs. greens, etc. Is there a Composting for dummies article anyone can point me to?
Garet, Nashville, TN
Posted: 3/25/2014 5:08:06 AM
It's getting warm enough here in Ohio I may start experimenting with worm bins. I have a great source for fresh fruit, vegetable and leafy green mash every day.
Andrew, Columbus, OH
Posted: 3/23/2014 6:41:44 AM

Featured Product

Cooking with Heirlooms | More Info »

Related Articles

Advertiser Links

Top Products
Gold Standard

*Content generated by our loyal visitors, which includes comments and club postings, is free of constraints from our editors’ red pens, and therefore not governed by I-5 Publishing, LLC’s Gold Standard Quality Content, but instead allowed to follow the free form expression necessary for quick, inspired and spontaneous communication.

Would you like to receive Farmer in the City Newsletters?X Close Window
Please provide us with your email address in order to access this valuable sustainable-living content.
Fields marked with an asterisk * are required.
* Are you at least 13 years old?
* First Name:
* Last Name:
* Email:
* City:
* State/Province:
* Enter the code shown:

  Yes, I would like to get valuable information from UrbanFarmOnline.com.
In order to opt-out of our newsletters, you can click on the "unsubscribe" link in the bottom of the newsletter.
  Yes, I would like to get valuable information from UrbanFarmOnline.com partners.