2013 NCSU Vermiculture Conference Notes

NCSU site of vermiculture conference attended by Red Wiggler SupplyJust getting an agenda and seat at the conference — it was a brisk but pretty walk to the hall. The introduction will be by Rhonda Sherman, from the Biological & Agricultural Engineering Department here at NC State University who organizes these conferences every year. This is the 14th year and participants are from 7 countries and all over the US. There are 130 people here.

First the participants were given an orientation — parking, facilities, location of recycling and compost bins — pretty important with this crowd. At lunch we’ll compost our paper plates, cups, and napkins of course. There will be a networking evening at the Brownstone Hotel. Conference materials will be posted online after the weekend. See the other posts in this blog for speaker notes.

NCSU Vermiculture Conference 2013: Live Blog!

Tomorrow Susan will be representing Red Wiggler Supply at the annual conference on the latest in vermiculture (worm composting) at North Carolina State University in Raleigh, North Carolina.

Description: “A conference about earthworm farming and commercial vermicomposting taught by industry experts. This conference is for beginners or seasoned earthworm farm operators.”

I’m very excited and will take notes during the presentations and post them throughout the day. The lineup of speakers is posted on their website under “Agenda”.

Setting up a worm composting habitat in an aquarium?

Question: I have an aquarium I’d like to use for a worm composting project in my classroom. Will this work and do you have any tips?

Great question. I’m not sure worm composting is the right project for an aquarium. I can see that you like the idea of being able to see the worms, as you would in an ant farm, however the reality is that worms don’t like light and won’t hang out in plain view. Also, they may try to escape the habitat at night. Drainage also might be an issue.

If you’d like to try it anyhow, you could start with lots of premoistened shredded cardboard in the aquarium — fill it most of the way full. Then add some established compost with the red wiggler worms and some kitchen scraps on top of the bedding. Then lay a thick damp section of newspaper or two on top folded to the size of the top of the aquarium. You’d lift this thick pad of paper up to add food to the tank.

Moisten the system only if the bedding is drying out. Most successful worm bins have drainage holes at the bottom so water doesn’t stagnate, so you’ll want to watch to make sure water’s not collecting at the bottom.

Let us know how it works out! Has anyone else tried an aquarium as a worm composting habitat?

Update: Week two and so far so good. The teacher taped black paper on the sides of the aquarium that the students can lift to see the worms.

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Best way to collect worm compost out of a simple box or rubber worm bin

Have a basic one layer box for a worm bin? There is an easy way to collect the compost — it just takes a bit of patience! You don’t even have to handle the worms (unless you want to of course!)

Red wiggler worms deposit most of the castings on the bottom, so if you dig down and the bedding has been turned into thick dark castings, it is probably time to harvest it. Here are the steps:

  1. With a small shovel, push the heavy old compost, worms and all, to one half of the bin.
  2. Add moistened fresh bedding — shredded newspaper or cardboard — to the bottom of the other half of the bin.
  3. Push any recently added, uncomposted food scraps, worms and all, over onto the fresh bedding.
  4. Add some fresh food scraps to the new bedding.
  5. Top off the new side with a layer of moistened newspaper or other bedding.
  6. Wait a month. the red wigglers will migrate from the old compost to the new bedding.
  7. Collect the finished worm-free compost.
  8. Fill the empty side with fresh bedding and add food scraps as needed.


Vermiculture Conference at NCSU in October, 2013 — Focus on composting with red wiggler worms

People interested in worm composting — from beginners to industry professionals — are invited to an annual conference at North Carolina State University Oct. 26-27. Speakers from around the world will be sharing their knowledge on vermicomposting practices.  Information is here: http://www.bae.ncsu.edu/workshops/worm_conference/. Stay tuned — we’ll post information we gather on the latest practices as they apply to home composting with red wigglers after the conference.

Adding excess fruit to your compost bin

If you’re into gardening, canning or preserving, you may have lots of overripe fruits, peels and cores to add to your worm compost. Keep in mind that adding too much of one item can upset the balance of your worm bin.

When adding acidic fruits such as apple, citrus, pineapple and tomato, put them in one corner of the bin so that worms can eat them when they’re ready!

Recycle cardboard into your worm composter

Shredded cardboard and paper in Worm Factory tray

Shredded cardboard and paper in a Worm Factory tray

Cardboard is a great bedding and addition to your compost bin. It adds a carbon-rich “brown” component, and worms love to eat it. The texture of the cardboard provides a rich microbial environment for the worms, as well as properties that hold moisture and promote airflow in the bedding. The worms may even get nutrition from the glues in corregated cardboard.

Cardboard can be added in sheets, but if it is torn up or shredded they’ll break it down faster. Added to the top of a tray or bin, it can keep in moisture, prevent odors from developing, and keep the fruit flies away.

Favorite foods of red wiggler worms

By observing your bin, you’ll see which foods they prefer over time. Here are some favorites:

  • Squash and pumpkin
  • Melon rinds and pulp
  • Avocado skins
  • Banana Peels
  • Mango

Foods they don’t like so much are:

  • raw potato peels
  • onions and garlic
  • acidic fruits like pineapples and citrus
  • hot chilies
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Grass clippings? Add with care

If you have a large outdoor worm compost bin, you may want to add grass clippings to the mix. One problem is that finely cut fresh grass often heats up to a temperature that is too hot for the worms! If you want to compost grass clippings, add them to one side of your bin so that worms can move away until they cool off. Another option is to precompost them in a separate pile before feeding them to the worms.

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Making worm compost tea

You can mix the worm castings from your bin with water to make a liquid fertilizer. This compost tea is an excellent fertilizer for both outdoor and indoor plants. It can also be sprayed on foliage to ward off insects and disease.

One common misconception is that liquid that drains from your compost bin is “tea”. This drained liquid is actually called “leachate” and should be used as a fertilizer with caution. If it comes from a mature worm bin, it is probably a fine fertilizer, but if your bin still has some uncomposted material or anaerobic areas, the leachate could contain unstable compounds that could harm your plants. If in doubt, use leachate on less sensitive areas of your garden.

Vacation care for red wigglers: 1 week to 2 months

Leaving your worm bin while you’re on vacation is fine — just prepare a comfortable environment for the worms:

  • Move bin to a cool, dry place, protected from sun and rain.
  • Make sure your bin has some airholes or cracks for ventilation.
  • Harvest excess castings from the bin and replace it with fresh bedding
  • Add food scraps to two corners of the bin and cover with fresh bedding.
  • Moisten the bedding, and help the bin retain moisture by adding a mat of wet newspaper on top.
  • Make sure there is no standing water in the bin and (empty the drainage reservoir if necessary).

The worms will break down the new food scraps and fresh bedding while you’re away. They will turn them into well processed castings if you leave them for an extended period of time. After they consume the bedding and food, they will not multiply as quickly or grow as fast. If left longer than two months, you should have someone add fresh food, bedding and moisture to the bin.