Wednesday, November 3, 2021

Vermicompost Is Worm Poop

My dad recently pointed out that we're all basically worms.

Niches have filled and tissues have specialized, but the overall body plan is the same. Food goes in one hole, and comes out the other. Fatty outer casing. Bilateral symmetry. Fun sexy bits. Worms.

worm
This is you.

The body plan wouldn't work in two dimensions. How could you connect the inside parts to the outside parts without blocking either the mouth or the anus? Others have imagined a zipper-like mechanism where the flat animal is zipped shut except for in cavities of food that propagate backwards. I don't know whether nature could produce such an organ. I also don't know whether a universe could exist in two dimensions.

Fortunately, we live in at least three dimensions, and the food that comes out is called poop, except that when it comes out of a worm, it's called "castings." This is strange, because the "cast" left by the worm is the void in the soil due to the worm's having eaten through it, not the resulting poop. My guess is that it sounds better than "poop," and we can't call them "droppings," can we?

Compost

I tried composting, it's harder than it sounds.

  1. Put organic stuff in a pile.
  2. Keep the carbon to nitrogen ratio of the contents within certain bounds.
  3. Keep the pile aerated so that aerobic bacteria proliferate instead of the stinky stinky anaerobic bacteria.
  4. Keep animals away from the pile.
  5. Wait a long time. If there's a lot of stuff, it'll heat up and go faster.

(1) was a five gallon bucket on the roof. (4) was a loosely fit lid on the bucket. (5) wasn't a problem because I wasn't in a hurry.

(2) and (3) are the hard parts. I inoculated some used potting soil with over ten pounds of spent malted barley from a batch of beer that I had brewed. That's way too much nitrogen. The bacteria went apeshit, liquefied the organic mass, which then became compacted in the bucket, and so went anaerobic, i.e. septic.

I took a peek under the lid about a month later, and there were mushrooms sprouting from the surface. There were also hundreds of flies, wriggling maggots, and various crawling insects.

Yeah, I could have mixed in more shredded cardboard, and I could have stirred the pile regularly to keep it aerated, but who could be bothered? The roof is far.

It's been a good while since then, so that now the compost has mostly stabilized. It smells like ammonia, and the pH is way too high. Never again.

Vermicompost

I read an article online that said compost is for suckers. Vermicompost is where it's at.

The pitch goes like this. Why wait months for the simplest known organisms to microscopically chew away at your food scraps? Instead, get something with a real mouth to chew away at your food scraps, right now.

Think about it. It takes your body a couple of days to turn food into brown biomass. Days, not months. But your brown biomass is nasty. Primates are terrible. A red wiggler worm, on the other hand, puts out its entire body weight in poop every day, and the resulting "castings" have no foul odor.

It's not just randos on the internet, either.

Here's one of the bottles of liquid fertilizer that I bought:

Fox Farm Big Bloom fertilizer bottle

It's shouting right there on the bottle:

EARTHWORM CASTINGS & BAT GUANO

The company whose soil I'm using this season, Coast of Maine, also makes a special cannabis-specific potting soil called "Stonington Blend."

Coast of Maine Stonington Blend potting soil

This soil incorporates mycorrhizal fungi, kelp, fish bone and alfalfa meal, as well as worm castings, peat, coir and lobster compost. When growing in 15 gallon containers, there is no need for additional nutrients.

Fifteen gallons? I'm growing in a crawl space, people.

Finally, there's a company called Build a Soil that's become popular due in part to a YouTube channel hosted by the company's CEO, where he proselytizes for The Gospel of Organic No-Till Living Soil Cannabis Gardening. I grow in tiny pots of mediocre soil amended with chemical fertilizers, but his insight is still helpful. Here's what he has to say about adding solid organic fertilizer to the top of the soil:

There are many ways to approach top dressing a plant but here is a method that I really like.

For every 5 Gallons the plant is in I would add the following:

  1. 1 Tablespoons Kelp Meal
  2. 2 Tablespoons Fish Bone Meal
  3. 4 Tablespoons Gypsum
  4. Cover with up to 1/2" - 1" layer of worm castings across the whole container.
  5. Put the mulch back, or cover with fresh mulch etc.

These people love worm poop. It's all the rage. Let's make some.

Roommates

The LES Ecology Center will sell you some worms, just call (212)-477-4022 to order in advance and then pick up at one of their farmers' market tents in Union Square or Tomkins Square Park.

I called and they told me that the worms are done this year. Call back next Spring.

So, I ordered worms online. Uncle Jim's Worm Farm will ship you a drawstring bag of 500 worms from Pennsylvania for $45.

bag of worms

You can't just keep them in a bag, though. I bought some more five gallon plastic buckets from the local hardware store, and built a worm bin.

worm bin

worm bin taken apart

Here's the idea. One of the buckets has a bunch of holes in the bottom and along the rim. You line the bottom with some newspaper and fill it a few inches deep with wetted shredded paper and food scraps. The worms live in there. The lid goes on, itself with holes, and also I put a cut up t-shirt under the lid to discourage fruit flies. That bucket then stacks inside of a bucket without holes, to catch any liquid that gets through the newspaper and out the bottom holes.

Feed the worms at least once a week.

Here's the cool part. What about when you want to harvest the poop from the worms? Do you go digging through the poop, picking out worms with your hands like a barbarian?

No, you don't. Instead, you have another bucket with holes. You put fresh food and bedding into the new bucket and place it on top of the old. The worms, running out of food in their bucket, will wiggle their way up into the top bucket. After a few days, you harvest the castings from the first bucket, dump the contents of the new bucket (worms and all) back into the first bucket, and you're ready to make another batch of worm poop. Brilliant!

The worms arrived just this morning. Here they are squirming in their new home of shredded paper, trimmed cannabis leaves, and spent coffee grounds:

worms in the bin

Let the pooping begin.

Gardening